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Academic literature on the topic 'Pion masses'

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Published: 6 September 2023

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Journal articles on the topic "Pion masses"

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LEBIEDOWICZ, PIOTR, and ANTONI SZCZUREK. "EXCLUSIVE PRODUCTION OF π+π- PAIRS IN PROTON-PROTON AND PROTON-ANTIPROTON COLLISIONS." International Journal of Modern Physics A 26, no. 03n04 (February 10, 2011): 748–50. http://dx.doi.org/10.1142/s0217751x11052724.

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We report on a detailed investigation of four-body pp → ppπ+π- and [Formula: see text] reactions which constitute an irreducible background to three-body processes pp → ppM, where M is a broad resonance in the π+π- channel, e.g. M = σ, ρ0, f0(980), f2(1275), f0(1500). We include double-diffractive contribution (both pomeron and reggeon exchanges) as well as the pion-pion rescattering contributions. The first process dominates at higher energies and small pion-pion invariant masses while the second becomes important at lower energies and higher pion-pion invariant masses. We compare our results with the experimental data. We make predictions for future experiments at PANDA, RHIC, Tevatron and LHC energies. The two-dimensional distribution in rapidity space of pions (yπ+, yπ-) is particularly interesting. The higher the incident energy, the higher preference for the same-hemisphere emission of pions. The processes considered constitute a sizeable contribution to the total nucleon-nucleon cross section as well as to pion inclusive cross section.
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Dominguez, C. A., M. Loewe, and M. Lushozi. "Scalar Form Factor of the Pion in the Kroll-Lee-Zumino Field Theory." Advances in High Energy Physics 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/803232.

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The renormalizable Kroll-Lee-Zumino field theory of pions and a neutral rho-meson is used to determine the scalar form factor of the pion in the space-like region at next-to-leading order. Perturbative calculations in this framework are parameter-free, as the masses and the rho-pion-pion coupling are known from experiment. Results compare favorably with lattice QCD calculations.
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Friedrich, Jan. "Chiral symmetry breaking: Current experimental status and prospects." EPJ Web of Conferences 282 (2023): 01007. http://dx.doi.org/10.1051/epjconf/202328201007.

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Chiral symmetry, linked to the smallness of the quark masses compared to the QCD bound states, and its breaking pattern are exploited in effective field theory to describe a multitude of phenomena by a few low-energy constants. Those concern light-meson dynamics and decays, their couplings to photons and meson-nucleon interactions. Special emphasis is given to the pion properties, in terms of pion-pion low-energy scattering, the pion polarizability and the chiral anomaly, which describes the coupling of three pions to a photon. These properties are studied by the COMPASS collaboration at CERN since first data taking with pion beams in the year 2004, and several following campaigns. In the framework of the upcoming AMBER collaboration, it is planned to extend the studies to the kaon sector.
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Bussone, Andrea, Michele Della Morte, and Tadeusz Janowski. "Electromagnetic corrections to the hadronic vacuum polarization of the photon within QEDL and QEDM." EPJ Web of Conferences 175 (2018): 06005. http://dx.doi.org/10.1051/epjconf/201817506005.

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We compute the leading QED corrections to the hadronic vacuum polarization (HVP) of the photon, relevant for the determination of leptonic anomalous magnetic moments, al. We work in the electroquenched approximation and use dynamical QCD configurations generated by the CLS initiative with two degenerate flavors of nonperturbatively O(a)-improved Wilson fermions. We consider QEDL and QEDM to deal with the finite-volume zero modes. We compare results for the Wilson loops with exact analytical determinations. In addition we make sure that the volumes and photon masses used in QEDM are such that the correct dispersion relation is reproduced by the energy levels extracted from the charged pions two-point functions. Finally we compare results for pion masses and the HVP between QEDL and QEDM. For the vacuum polarization, corrections with respect to the pure QCD case, at fixed pion masses, turn out to be at the percent level.
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Cahill, Reginald T., and Susan M. Gunner. "The Pion Mass Formula." Australian Journal of Physics 51, no. 3 (1998): 509. http://dx.doi.org/10.1071/p96110.

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The often used Gell-Mann–Oakes–Renner (GMOR) mass formula for Nambu-Goldstone (NG) bosons in QCD, such as the pions, involves the condensate ·q q Ò fp and the quark current masses. Within the context of the Global Colour Model (GCM) for QCD a manifestly different formula was recently found. Remarkably, Langfeld and Kettner have shown the two formulae to be equivalent. Here we note that the above recent analyses refer to the constituent pion and not the exact pion, even within the GCM. Further we generalise the Langfeld-Kettner identity to include the full response of the constituent quark correlators to the presence of a non-zero (and momentum dependent) quark current mass. Results are reported using an effective gluon correlator from meson data fitting.
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Sanchis-Alepuz, Hèlios, Christian S. Fischer, and Stanislav Kubrak. "Pion cloud effects on baryon masses." Physics Letters B 733 (June 2014): 151–57. http://dx.doi.org/10.1016/j.physletb.2014.04.031.

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Nam, Soonkeon, and Ron L. Workman. "Generalized Skyrme model with pion masses." Physical Review D 41, no. 7 (April 1, 1990): 2323–26. http://dx.doi.org/10.1103/physrevd.41.2323.

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SAHU, SARIRA, and S. C. PHATAK. "NUCLEON PROPERTIES IN CHIRAL COLOR DIELECTRIC MODEL." Modern Physics Letters A 07, no. 08 (March 14, 1992): 709–21. http://dx.doi.org/10.1142/s0217732392000689.

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The chiral extension of color dielectric model has been used to study the static properties of nucleon. In this calculation we have treated the gluon and the pion fields perturbatively. It is found that the neutron charge rms radius and the pion-nucleon coupling constant are almost insensitive to the parameters used and are in excellent agreement with the experimental values. For better fitting the proton charge rms radius, nucleon magnetic moments and axial coupling constant prefer large quark masses (~100 MeV) and small glueball masses (<1100 MeV). The strong coupling constant is found to be very sensitive to the quark and glueball masses.
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Pasupathy, J. "PCAC and Modifications in Hadron Properties in Nuclear Medium." Modern Physics Letters A 12, no. 26 (August 30, 1997): 1943–49. http://dx.doi.org/10.1142/s0217732397001989.

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It is known that the Adler zero condition when imposed on pion amplitudes leads to several relations between hadron masses through the dual resonance formula of Lovelace, Shapiro and Veneziano. In particular the Lovelace quantization condition leads to the relation [Formula: see text] which is well satisfied experimentally. The Regge slope parameter α′ can be related to the gluon condensate. The latter is modified in the nuclear medium as compared to its value in the QCD vacuum. Combining the PCAC hypothesis with changes in gluon condensate leads to lowering of vector masses in the nuclear medium. It also leads to predictions regarding, nucleon isobar mass differences, pion decay constant in the medium, pion amplitudes and transverse momentum distribution of secondaries in heavy ion collisions.
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Sasaki, Chihiro, David Blaschke, Pok Man Lo, Michał Marczenko, Kenji Morita, and Krzysztof Redlich. "Parity Doubling in QCD Thermodynamics." Proceedings 13, no. 1 (June 24, 2019): 7. http://dx.doi.org/10.3390/proceedings2019013007.

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Motivated by the recent lattice study by FASTSUM collaboration, effective masses of the baryon parity-doublers are shown for various pion masses. A general trend of the nucleon and delta parity-doublers is consistent with the lattice Quantum Chromodynamics (QCD) observation, whereas the hyperon masses exhibit a qualitatively different behavior, traced back to the lattice set-up with the heavy pion comparable to the kaon. As an application to hot QCD, we demonstrate the fluctuations and correlations involving baryon number in hot hadronic matter with modified masses of negative-parity baryons, in the context of the hadron resonance gas. Confronting the baryon number susceptibility, baryon–charge and baryon–strangeness correlations as well as their ratios with the lattice QCD data for the physical pion mass, we find that the strong downward mass shift in the hyperons can accidentally reproduce some correlation ratios, however it also tends to overshoot the individual fluctuations and correlations of lattice simulations. Another application of nucleon parity doubling is the physics of neutron stars. Under beta equilibrium and charge neutrality, hadronic matter with unbroken chiral symmetry can be favored in the core of the neutron stars.
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Dissertations / Theses on the topic "Pion masses"

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Tsang, Justus Tobias. "Continuum limit of D and Ds decay constants with Moebius domain wall fermions at physical pion masses." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/405419/.

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The inclusion of heavy quarks, such as the charm quark, poses difficulties in Lattice QCD simulations. These need to be overcome in order to make predictions of hadronic observables including a charm quark such as the decay constants fD and fDs. We first establish the region of validity of simulating heavy quarks with domain wall fermions (DWFs) in a feasibility study. We then carry out dynamical simulations with RBC/UKQCD’s Nf = 2+1f ensembles at three lattice spacings (a −1 = 1.73 − 2.77 GeV) including two physical pion mass ensembles. From this we make a prediction for the decay constants fD and fDs and, using experimental input, the corresponding CKM matrix elements. In the first part of this work we investigate the suitability of domain wall fermions (DWF) as a lattice regularisation for heavy quarks. We generate four quenched QCD gauge ensembles with the tree-level improved Symanzik gauge action and inverse lattice spacings in the range 2.0 − 5.7 GeV. On these we carry out an exploratory study to identify a region in the DWF parameter space that displays minimal cut-off effects. We find this region for the domain wall height M5 = 1.6 allowing for bare heavy quark masses satisfying amh <∼ 0.4, independent of the lattice spacing. Below this limit we maintain desirable features of DWF such as approximate chiral symmetry and O(a)-improvement. Based on this, we carry out a detailed scaling study of the decay constants of heavy-strange pseudoscalar mesons and the dispersion relation of heavy-heavy and heavy-strange pseudoscalar mesons. We find mild a2 discretisation effects for the heavy-strange decay constants and the heavy-strange dispersion relation. The cut-off effects for the heavy-heavy pseudoscalar dispersion relation are somewhat more pronounced. On our ensembles we find a 4 effects for heavy masses beyond the charm quark mass and large momenta (|p| ∼ 1.6 GeV). The findings of the pilot study establish the basis for simulations of charm quarks with domain wall fermions. In the second part of the presented work we simulate heavy-light and heavy-strange pseudoscalar mesons on RBC/UKQCD’s 2 + 1f ensembles with pion masses as low as 139 MeV and inverse lattice spacings ranging from 1.73 GeV to 2.77 GeV. From this data we extract the decay constants fD and fDs. We devise two different fit ansatze to process this data and carry out a full systematic error analysis. We find fD = 208.7(2.8)stat (+2.1−1.8)sys MeV, fDs = 246.4(1.9)stat (+1.3−1.9)sys MeV and fDs/fD = 1.1667(77)stat (+60−46)sys. Finally, using experimental input we extract the corresponding CKM matrix elements. We find |V|cd = 0.2185(50)exp. (+35−37)lat and |V |cs = 1.011(16)exp. (+11− 9)lat where the first error comes from the experimental input and the second from our determination of the decay constants. We compare our results with the existing literature and find good agreement between our central values and competitive errors. This work constitutes the basis of RBC/UKQCD’s wider charm physics program.
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Sharkey, Kieran James. "An investigation of the running coupling and meson masses in lattice QCD." Thesis, University of Liverpool, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343926.

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Sandoz, Henri. "Recherches taxonomiques, biogéographiques et phytoécologiques sur les principaux conifères subalpins des Alpes : mélèze d'Europe, pin cembro, pin à crochets et pin mugho : Etudes de terrain centrées sur les Alpes maritimes et ligures (Région du Parc national du Mercantour)." Aix-Marseille 3, 1987. http://www.theses.fr/1987AIX30017.

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Les recherches présentés dans ce travail ont pour objectif majeur d'arriver à une meilleure connaissance bio-écologique des principales essences subalpines de conifères des Alpes et des écosystèmes qu'elles constituent : mélèze (larix europaea DC. = larix decidua mill. ), pin cembro (pinus cembra l. ), pin à crochets (pinus uncinata Ramond) et pin mugho (pinus mughus Scopoli). Les études de terrain ont été principalement centrées sur un secteur très privilégié des Alpes : les Alpes Maritimes et ligures. Des recherches historiques, taxonomiques et chronologiques sur les principaux pins dits "de montagne" ont abouti, en particulier, à la clarification de leur nomenclature, à une nouvelle clé de détermination et à un schéma de leur phylogénie. Des investigations phytoécologiques ont été effectuées dans les groupements subalpins les plus importants. La dynamique des formations sylvatiques a été largement envisagée de même que le problème de leur régénération. Les conclusions d'études pédologiques et microclimatiques réalisées dans des stations subalpines types concourent à préciser les exigneces écologiques des diverses essences. . .
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Michel, Denis Paul. "Transferts de chaleur et de masse dans un bois résineux : application au séchage du pin maritime." Bordeaux 1, 1985. http://www.theses.fr/1985BOR10536.

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Dalstein-Richier, Laurence. "Etat phytosanitaire des cembraies du Mercantour et du Queyras en liaison avec la pollution atmosphérique et les facteurs écologiques." Aix-Marseille 3, 1997. http://www.theses.fr/1997AIX30042.

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Le pin cembro ou arolle est une essence subalpine bien presente dans le vallon de mollieres (parc national du mercantour). Ce pin repute tres robuste entre en competition en altitude, vers 2000m, avec le meleze, l'epicea et le pin a crochets. Depuis un peu plus d'une dizaine d'annees, l'etat phytosanitaire de pinus cembra l. Se degrade. Ses aiguilles les plus anciennes presentent des symptomes de jaunissement d'une ampleur anormale qui precedent leur chute. Les jeunes aiguilles quant a elles offrent des taches chlorotiques. Dans d'autres secteurs des alpes du sud, comme le queyras, ce phenomene est moins developpe. Les facteurs biotiques (ravageurs entomologiques et cryptogamiques) n'etant pas determinants dans ce processus, ce sont d'autres hypotheses qui sont envisagees et testees par une analyse comparative de peuplements peu affectes (queyras) et tres affectes (mercantour) : - parametres naturels : perturbation climatique, carence nutritionelle. - facteurs anthropiques : pollution acide humide ou pollution gazeuse, ozonique en particulier dont le role est loin d'etre negligeable. Plusieurs types d'etudes sont menees pour confirmer cette hypothese : dendrologie et devenir de la flore herbacee permettant d'aborder l'histoire et l'evolution du stress, analyse microstructurale tissulaire et recherche des marqueurs de stress tel que l'acide abcissique.
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El-Khoury, Pascal. "Spectroscopie de précision des atomes pioniques et antiprotoniques." Phd thesis, Université Pierre et Marie Curie - Paris VI, 1998. http://tel.archives-ouvertes.fr/tel-00011776.

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L'étude des atomes exotiques, où un électron de l'atome est remplacé par une autre particule de charge négative (π-, μ-, p , K-, Σ-, ...) peut fournir des informations sur la particule ou sur le noyau, ou encore sur l'interaction entre la particule et le noyau. Au cours de ce travail, nous nous sommes intéressés, d'une part, aux atomes pioniques (π-14 N) dans le but de déterminer la masse du pion négatif avec une très bonne précision (4 ppm), et d'autre part, aux atomes antiprotoniques ( pp ) pour étudier l'interaction forte entre un nucléon et un antinucléon. A cet égard, un spectromètre de Bragg de haute résolution et une trappe cyclotron ont été utilisés. Avec sa capacité de fabriquer en grande quantité les atomes exotiques, la trappe cyclotron a fourni une source intense de rayons-X. Les cristaux courbes du spectromètre focalisant les rayons-X ont assuré un gain considérable en intensité. Grâce à leur résolution spatiale, les CCD utilisés comme détecteurs ont permis une détermination précise de l'angle de Bragg correspondant à la transition à mesurer. L'utilisation d'un milieu gazeux pour arrêter les pions a résolu l'ambiguité provenant de l'hypothèse sur le nombre d'électrons K recapturés de la cible. D'un autre côté, nous avons réalisé la première mesure directe du décalage et de l'élargissement hadroniques du niveau 2p dans l'hydrogène antiprotonique.
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Avice, Bertrand. "L'écotourisme sur la façade orientale du massif du Piton de la Fournaise, Île de la Réunion-océan Indien : définition, enjeu et stratégie d'aménagement dans le cadre d'un développement durable." La Réunion, 2001. http://elgebar.univ-reunion.fr/login?url=http://thesesenligne.univ.run/01_02_Avice.pdf.

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La charte réunionnaise de l'environnement (1995) stipule que La Réunion (sud-ouest de l'océan Indien) doit se doter d'un label écotouristique fort. Le terme écotourisme est très peu utilisé à La Réunion, ce qui a valu une mise au point terminologique et une proposition de définition. Si celle-ci devait être portée et défendue par les acteurs de la politique, elle permettrait de tendre vers une nouvelle culture de la nature et une approche durable de découverte ou de redécouverte du patrimoine naturel pour les résidents et non résidents de La Réunion. Le changement d'échelle géographique, l'accompagnement pédagogique et le guidage seraient utiles pour y parvenir. L’écotourisme pourrait se fonder sur les richesses naturelles uniques et encore bien préservées sur la façade orientale du massif de la Fournaise. Une stratégie politique préventive serait nécessaire pour gérer et préserver des sites très attractifs (indice d'attractivité). Des aménagements et un guide géographique de découverte écotouristique sont proposés. La construction d'un écosite pourrait être le pôle structurant de l'organisation spatiale de l'écotourisme. Les activités touristiques liées à l'utilisation des ressources écologiques augmentent parallèlement à la population résidente de La Réunion. L'écotourisme serait une démarche globale permettant la préservation de l'environnement naturel et engendrant des ressources économiques. Son évolution pourrait représenter un véritable développement durable pour la façade orientale du massif de la Fournaise et serait en adéquation avec le schéma d'aménagement régional (1995).
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Trassinelli, Martino. "Tests d'Électrodynamique Quantique et Étalons de Rayons-X à l'Aide des Atomes Pioniques et des Ions Multichargés." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00067768.

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L'objet de cette thèse est de présenter une nouvelle mesure de la masse du pion en utilisant la spectroscopie X de l'hydrogène pionique et des résultats de spectroscopie de l'argon et du soufre héliumoïdes. La nouvelle masse du pion a été mesurée avec une précision 30% supérieure à la moyenne mondiale actuelle, c'est-à-dire égale à 1.7 ppm. Elle a été obtenue par spectroscopie de Bragg des transitions 5 -> 4 de l'azote pionique en utilisant les prédictions théoriques de QED. Je présente le calcul de la structure hyperfine et celui de la correction de recul du noyau pour les atomes pioniques au moyen d'une nouvelle méthode de perturbation de l'équation Klein-Gordon.Le spectromètre utilisé pour cette mesure a été caractérisé grâce aux transitions relativistes des atomes héliumoïdes produits dans un nouveau type de source d'ions à résonance cyclotronique des électrons. Les spectres haute statistique de ces ions permettent de mesurer les énergies de transition avec une précision de quelques ppm, ce qui permet de tester, avec un degré de précision jamais atteint, les prédictions théoriques. L'émission de rayons-X des atomes pioniques et des ions multichargés peut ainsi être utilisée pour la définition de nouveaux étalons de rayons-X de quelques keV.
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Shater, Zuheir. "Diversité végétale et sylviculture : effet de la plantation et de la gestion d'espèces forestières introduites sur la diversité végétale : étude du cas d'anciennes châtaigneraies des Cévennes-Midi de la France." Aix-Marseille 3, 2001. http://www.theses.fr/2001AIX30074.

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La plantation et la gestion d'essences forestières introduites ont des conséquences considérables sur la biodiversité. C'est pourquoi les gestionnaires sollicitent de plus en plus de recherche leur permettant de mieux comprendre ces conséquences et de respecter ainsi la biodiversité dans leurs actions. Dans ce cadre général, l'objectif de cette thèse a consisté dans un premier temps à analyser l'effet, sur la diversité végétale, de l'implantation de trois essences forestières introduites (pseudotsuga menziesii, pinus laricio, cedrus atlantica) et de la présence du châtaignier (castanea sativa) dans le sous bois en mélange avec ces essences. Ce travail a été réalisé dans la région des Cévennes où des surfaces considérables de ces essences ont été plantées dans ces dernières décennies. Dans un deuxième temps, la relation entre la diversité végétale et certains paramètres, liés ou non à la sylviculture de ces plantations, tels que les caractéristiques dendrométriques du peuplement, l'indice de surface (leaf area index, LAI), l'état de surface du sol et la flore de la station a été analysée
Afforestation and management of introduced forest tree species have considerable consequences on the biodiversity. The managers require more scientific research to better understand these consequences and to enhance the biodiversity in their actions. Our objective is to analyse the effect (i) of the afforestation, on plant species diversity, by three introduced forest tree species (Pseudotsuga menziesii, Pinus Laricio, Cedrus atlantica) and (ii) of the chesnut presence (Castanea sativa) in the understory mixed with these species. This work was carried out in the Cevennes region where considerable surfaces of these species have been planted in the last decades. Afterwards, the relation between plant species diversity and certain parameters, related or not to the silviculture of these species, such as stand dendrometric characteristics, Leaf Area Index (LAI), soil surface state and the flora of the station, was analyzed. .
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Antoine, Raphaël. "Exploration et modélisation de la circulation d'air dans le Piton de la Fournaise et Cerberus Fossae (Mars)." Toulouse 3, 2009. http://thesesups.ups-tlse.fr/748/.

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Au Piton de La Fournaise, aucune manifestation de surface du système hydrothermal n'est observée entre les éruptions. Ce phénomène a été expliqué par un refroidissement du volcan induit par l'importante quantité d'eau de pluie s'infiltrant dans l'édifice. Dans la présente étude, nous proposons que ce volcan très perméable soit le siège d'une convection d'air intense. Pour étayer cette hypothèse, nous étudions la circulation d'air dans un cône inactif de 50 m de diamètre situé sur les flancs du volcan à partir de mesures de thermographie infrarouge, thermiques et anémométriques de subsurface, gravimétriques et radar. En particulier, nous établissons les relations existant entre le champ thermique et le champ électrique induits par la circulation d'air dans le cône. Enfin, nous utilisons ces relations pour démontrer que l'ensemble du volcan est refroidit par la convection d'air. Cette découverte possède des implications fortes pour la structure volcaniques d'autres planètes. Sur Mars, nous utilisons les données infrarouge THEMIS pour étudier la circulation d'air dans les zones de fractures perméables de Cerberus
At Piton de La Fournaise, there is no obvious surface manifestations of the hydrothermal system between éruptions. This phenomenon has been explained by the cooling of the volcano, induced by the important rain infiltrations within the structure. In this study, we propose that this highly permeable volcano is cooled by an intense air convection. To support this hypothesis, we study the air flow within a 50 m-large cone located on the volcano from infrared, subsurface temperature, anemometric, gravimetric and ground penetrating radar data. In particular, we determine the relationships between the thermal field and the electric field induced by the air flow within the cone. Finally, these relationships are used to propose that the entire volcano is cooled by air convection. This discovery has important implications for the volcanic structure of other planets. On Mars, we use THEMIS-IR data to study the convective air flow within the permeable soil of Cerberus fractures
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Books on the topic "Pion masses"

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Ye, Cui, ed. Wu wei du de ai: EMBA de tian kong. Shanghai: Shanghai ren min chu ban she, 2006.

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Beecher, Stowe Harriet. Uncle Tom's cabin, or, Life among the lowly. Peterborough, Ont: Broadview Press, 2009.

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Beecher, Stowe Harriet. Uncle Tom's cabin, or, Life among the lowly. Peterborough, Ont: Broadview Press, 2009.

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Beecher, Stowe Harriet. Tang mu shu shu de xiao wu: Uncle Tom's cabin. Beijing: Mei tan gong ye chu ban she, 2016.

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Beecher, Stowe Harriet. Uncle Tom's cabin. Oxford: Oxford University Press, 2008.

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Beecher, Stowe Harriet. Uncle Tom's cabin. New York: Modern Library, 1996.

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Beecher, Stowe Harriet. Uncle Tom's cabin, or, Life among the lowly. 2nd ed. New York: Modern Library, 2001.

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Beecher, Stowe Harriet. Uncle Tom's Cabin. Mineola, New York: Dover Pubublications, Inc., 2011.

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Beecher, Stowe Harriet. Uncle Tom's cabin. London: Bloomsbury, 1994.

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Beecher, Stowe Harriet. Uncle Tom's cabin. New York: Dover Publications, 2005.

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Book chapters on the topic "Pion masses"

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Henley, E. M., R. Su, M. Li, and S. Kuyucak. "Meson masses in a quark model with self-consistent pion couplings." In Springer Tracts in Modern Physics, 139–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/bfb0041270.

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Plessas, Willibald, and Regina A. Schmidt. "Pion Effects in N and $$\varDelta $$ Masses and Strong Form Factors." In Recent Progress in Few-Body Physics, 685–90. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-32357-8_109.

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Borchert, G. L., B. Manil, D. Anagnostopoulos, J. P. Egger, D. Gotta, M. Hennebach, P. Indelicato, Y. W. Liu, N. Nelms, and L. M. Simons. "Precision Measurement of the Charged Pion Mass by High Resolution X-Ray Spectroscopy." In Atomic Physics at Accelerators: Mass Spectrometry, 195–207. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-1270-1_15.

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"Quark masses in two-flavor QCD." In From Quarks to Pions, 131–43. WORLD SCIENTIFIC, 2018. http://dx.doi.org/10.1142/9789813229242_0015.

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Behn, Aphra. "96. On a Pin that hurt Aminta's Eye." In The Pickering Masters: The Works of Aphra Behn, Vol. 1: Poetry, edited by Janet Todd, 360. Pickering & Chatto, 1992. http://dx.doi.org/10.1093/oseo/instance.00212604.

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Aragão, José Aderval, Matheus Jhonnata Santos Mota, Victor Petersen Dantas Moreno, Iapunira Catarina Sant’Anna Aragão, Felipe Matheus Sant’Anna Aragão, Bárbara Costa Lourenço, Vera Lúcia Correa Feitosa, and Francisco Prado Reis. "Hérnia diafragmática congênita: uma breve revisão da literatura." In Ciências da Saúde: Atualização de Área - janeiro e fevereiro de 2023. Centro de Pesquisa, 2023. http://dx.doi.org/10.32749/nucleodoconhecimento.com.br/livros/1770.

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Abstract:
A Hérnia Diafragmática Congênita (em inglês – Congenital Diaphragmatic Hernia, doravante simbolizada pela sigla CDH) pode ser entendida como um abaulamento de parte do conteúdo abdominal para a cavidade torácica como resultado de um distúrbio no desenvolvimento embriológico do diafragma. Apresenta topografia variável e a Hérnia de Bochdalek, em região póstero-lateral, é a mais comum. A herniação do intestino grosso é a mais prevalente, sendo responsável por até 75% dos casos, seguida por omento maior com 65%, intestino delgado, estômago e fígado (SVETANOFF e RENTEA, 2021). Pode estar isolada em 50 a 60% dos casos ou associado a anomalias de outros órgãos incluindo coração, encéfalo, rins e genitálias (QI et al., 2018), com incidência de 34 a 50% (SVETANOFF e RENTEA, 2021). O prognóstico é pior na presença de hérnias hepáticas, prematuridade, baixo peso ao nascer e outras anomalias congênitas (YAMOTO et al., 2016). A mortalidade pode ser agravada por alterações pulmonares, como ramificação broncoalveolar diminuída, perda de massa pulmonar e vasculopatia pulmonar. Isso resulta em hipoplasia e hipertensão pulmonar, uma das maiores causas de morte na CDH (AL BAROUDI et al., 2020). Com efeito, a hipertensão pulmonar persistente do neonato (PPHN – sigla em inglês) pode ocorrer como consequência da hipoplasia pulmonar e se caracteriza por aumento da resistência vascular que persiste após o nascimento, o que causa mistura veno-arterial entre os lados do coração (GIEN e KINSELLA, 2016). Há alguns estudos promissores para a prevenção da PPHN. Desse modo, a triagem pela ultrassonografia (USG) pré-natal permite a detecção precoce de malformações e massas que ocupam a cavidade torácica, sendo dentre várias causas tumores e órgãos da cavidade abdominal na CDH (SCHIERZ et al., 2018). Com essa detecção precoce é possível melhorar o prognóstico do paciente e prevenir a PPHN. O presente trabalho teve como objetivo revisar os aspectos epidemiológicos, etiológicos, embriológicos, assim como a fisiopatologia, classificação, principais manifestações clínicas, diagnóstico e tratamento das hérnias diafragmáticas congênitas.
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Conference papers on the topic "Pion masses"

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Hoying, Daniel S. "Pion-pion scattering with physical quark masses." In The 36th Annual International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.334.0064.

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Chelnokov, Volodymyr, Bastian Brandt, Francesca Cuteri, and Gergely Endrodi. "Pion condensation at lower than physical quark masses." In The 39th International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2023. http://dx.doi.org/10.22323/1.430.0146.

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Pickavance, Jenny, F. Farchioni, K. Jansen, Craig McNeile, Chris Michael, I. Montvay, Kei-ichi Nagai, et al. "Twisted mass fermions: neutral pion masses from disconnected contributions." In XXIIIrd International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2005. http://dx.doi.org/10.22323/1.020.0033.

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Aoki, Sinya, and Michael Creutz. "Pion masses in 2-flavor QCD with $¥eta$ condensation." In The 32nd International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2015. http://dx.doi.org/10.22323/1.214.0316.

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Zhou, Ran. "Isospin symmetry breaking effects in the pion and nucleon masses." In The XXVI International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.066.0131.

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Tsang, Justus Tobias, Peter A. Boyle, Luigi Del Debbio, Andreas Juttner, Ava Khamseh, Francesco Sanfilippo, and Oliver Witzel. "Charm Physics with Domain Wall Fermions and Physical Pion Masses." In 34th annual International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.256.0278.

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Scadron, Michael D., Frieder Kleefeld, and George Rupp. "Pion and Kaon Masses and Pion Form Factors from Dynamical Chiral-Symmetry Breaking with Light Constituent Quarks." In QUARK CONFINEMENT AND THE HADRON SPECTRUM VII: 7th Conference on Quark Confinement and the Hadron Spectrum - QCHS7. AIP, 2007. http://dx.doi.org/10.1063/1.2714398.

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Kim, H. J., Jon Bailey, and Weonjong Lee. "Non-Goldstone pion masses with NLO in Staggered Chiral Perturbation Theory." In XXIX International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.139.0105.

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Baru, Vadim, Evgeny Epelbaum, Arseniy Filin, and Jambul Gegelia. "Application of low-energy theorems to NN scattering at unphysical pion masses." In The 8th International Workshop on Chiral Dynamics. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.253.0094.

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Bernard, Claude, Alexei Bazavov, Subhasish Basak, Carleton DeTar, Elizabeth Freeland, Justin Foley, Steven Gottlieb, et al. "Finite volume effects and the electromagnetic contributions to kaon and pion masses." In The 32nd International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2015. http://dx.doi.org/10.22323/1.214.0116.

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Reports on the topic "Pion masses"

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Chacon, A. D. Pion correlations as a function of atomic mass in heavy ion collisions. Office of Scientific and Technical Information (OSTI), November 1989. http://dx.doi.org/10.2172/5091759.

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Brown, David Shaw. A Comparison of High Transverse Momentum Direct Photon and Neutral Pion Events in Negative Pion and Proton - Nucleus Collisions at 31.5-GeV Center-of-Mass Energy. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/1425809.

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Avery, R. E. Bose-Einstein correlations of pions in e/sup +/e/sup minus/ annihilation at 29 GeV center-of-mass energy. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/6398651.

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Alexopoulos, Theodoros. A Measurement of the Bose-Einstein Correlation for the Two Pions in $p\bar{p}$ Collisions at Center-of-Mass Energy 1.8-TEV. Office of Scientific and Technical Information (OSTI), January 1991. http://dx.doi.org/10.2172/1426701.

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