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Добірка наукової літератури з теми "Strange D meson"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Strange D meson"

1

Du, Meng-Lin. "Implication of chiral symmetry on charm meson spectroscopy." EPJ Web of Conferences 202 (2019): 06003. http://dx.doi.org/10.1051/epjconf/201920206003.

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Анотація:
It is demonstrated that, if the lightest positive parity charm mesons are assumed to owe their existence to non-perturbative Goldstone boson-D/D∗ scattering, various puzzles in the charm meson spectrum get resolved. Most importantly the ordering of the lightest strange and non-strange scalars becomes natural. Furthermore, it is demonstrated that the amplitudes for Goldstone boson-D/D∗ scattering are fully consistent with the high quality data on decay B−→ D+π−π− provided by LHCb. It implies that the lowest positive-parity charm mesons are dynamically generated rather than quark-antiquark states.
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2

Debernardis, Francesco. "Spectroscopy of the excited Ds mesons." EPJ Web of Conferences 270 (2022): 00013. http://dx.doi.org/10.1051/epjconf/202227000013.

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Анотація:
The discoveries of the Ds0*(2317)+ and Ds1(2460)+ mesons challenge our understanding of quantum chromodynamics. After almost 20 years, the nature of these hadrons is still subject of debate and many models have been proposed to explain their unexpected masses: standard charmed-strange mesons, DK molecules and tetraquarks. The LHCb experiment has studied the production of excited Ds+ meson in prompt proton-proton collisions and from b-hadron decays. Precise measurement of their properties and observation of new Ds+ states have been reported. The latest results on the spectroscopy of the charmed-strange mesons and the prospect to investigate their nature will be presented.
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3

Grosa, Fabrizio. "Measurement of the D-meson nuclear modification factor and elliptic flow in Pb–Pb collisions at √SNN = 5.02 TeV with ALICE at the LHC." EPJ Web of Conferences 171 (2018): 18007. http://dx.doi.org/10.1051/epjconf/201817118007.

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Анотація:
Heavy-flavour hadrons are recognised as a powerful probe for the characterisation of the deconfined medium created in heavy-ion collisions, the Quark-Gluon Plasma (QGP). The ALICE Collaboration measured the production of D0, D+, D*+ and [see formula in PDF] mesons in Pb–Pb collisions at [see formula in PDF] = 5.02 TeV. The measurement of the nuclear modification factor (RAA) provides a strong evidence of the in-medium parton energy loss. The comparison between the [see formula in PDF] and the non-strange D-meson RAA can help to study the hadronisation mechanism of the charm quark in the QGP. In mid-central collisions, the measurement of the D-meson elliptic flow v2 at low transverse momentum (pT) gives insight into the participation of the charm quark into the collective motion of the system, while at high pT it constrains the path-length dependence of the energy loss. The [see formula in PDF] v2, measured for the first time at the LHC, is found to be compatible to that of non-strange D mesons and positive with a significance of about 2.6 σ. The coupling of the charm quark to the light quarks in the underlying medium is further investigated for the first time with the application of the Event-Shape Engineering (ESE) technique to D-meson elliptic flow.
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4

BENUSSI, LUIGI. "MEASUREMENTS OF MASSES AND WIDTHS OF EXCITED CHARM MESONS $D_2^*$, EVIDENCE FOR BROAD STATES AND OBSERVATION OF $D_S^+(2317)$ FROM FOCUS EXPERIMENT." International Journal of Modern Physics A 20, no. 02n03 (January 30, 2005): 549–53. http://dx.doi.org/10.1142/s0217751x05021750.

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Анотація:
I report three new results from photoproduction experiment FOCUS on L=1 excited meson spectroscopy: precise measurements of the masses and widths of the [Formula: see text] and [Formula: see text] mesons, evidence for broad states decaying to D+π-, D0π+ (the first such evidence in D0π+), and confirmation of the recently observed [Formula: see text] charmed-strange state.
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5

SEGOVIA, J., D. R. ENTEM, F. FERNANDEZ, and E. HERNANDEZ. "CONSTITUENT QUARK MODEL DESCRIPTION OF CHARMONIUM PHENOMENOLOGY." International Journal of Modern Physics E 22, no. 10 (October 2013): 1330026. http://dx.doi.org/10.1142/s0218301313300269.

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Анотація:
We review how quark models are able to describe the phenomenology of the charm meson sector. The spectroscopy and decays of charmonium and open charm mesons are described in a particular quark model and compared with the data and the results of other existing models in the literature. A quite reasonable global description of the heavy meson spectra is reached. A new assignment of the ψ(4415) resonance as a 3D state leaving aside the 4S state to the X(4360) is tested through the analysis of the resonance structure in e+e- exclusive reactions around the ψ(4415) energy region. We make tentative assignments of some of the XYZ mesons. To elucidate the structure of the 1+cs states, i.e., Ds1(2460) and Ds1(2536), we study the strong decay properties of the Ds1(2536) meson. We also perform a calculation of the branching fractions for the semileptonic decays of B and Bs mesons into final states containing orbitally excited charmed and charmed-strange mesons, which have become a very important source of information about the structure of heavy mesons. Analysis of the nonleptonic B-meson decays into D(*)DsJ are also included.
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6

Jaelani, Syaefudin. "Measurement of the D-meson Nuclear Modification Factor and Elliptic Flow in Pb–Pb Collisions at sNN = 5.02 TeV with ALICE at the LHC." International Journal of Modern Physics: Conference Series 46 (January 2018): 1860018. http://dx.doi.org/10.1142/s2010194518600182.

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Анотація:
Heavy-flavour hadrons are effective probes to study the Quark-Gluon Plasma (QGP) formed in ultra-relativistic heavy-ion collisions. The ALICE Collaboration measured the D-mesons (D0, D[Formula: see text], D*[Formula: see text] and D[Formula: see text]) production in Pb–Pb collisions at [Formula: see text] = 5.02 TeV. The in-medium energy loss can be studied by means of the nuclear modification factor ([Formula: see text]). The comparison between the D[Formula: see text] and the non-strange D-meson [Formula: see text] can help to study the hadronisation mechanism of the charm quark in the QGP. In semi-central collisions the measurement of the D-meson elliptic flow, [Formula: see text], at low [Formula: see text] allows to investigate the participation of the heavy quarks in the collective expansion of the system while at high [Formula: see text] it constrains the path-length dependence of the energy loss. Furthermore the Event-Shape Engineering (ESE) technique is used to measure D-meson elliptic flow in order to study the coupling of the charm quarks to the light quarks of the underlying medium.
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7

Ma, Li. "Double heavy tri-hadron bound state with strange flavor." EPJ Web of Conferences 202 (2019): 06007. http://dx.doi.org/10.1051/epjconf/201920206007.

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Анотація:
Through the Born-Oppenheimer Approximation, we have performed a comprehensive investigation of the DD∗K, D$ \overline D $*K, BB∗$ \overline K $ and B$ \overline B $*$ \overline K $ molecular states. In the framework of One-Pion Exchange model as well as the treatments of the coupled-channel effects and S-D wave mixing, we find a loosely bound tri-meson molecular state these systems with the isospin configuration |0,$ {1 \over 2} $, ±$ {1 \over 2} $> and quantum number I(JP) = 1/2(1−), where the, $ {1 \over 2} $ is the total isospin of the three-body system, the 0 is the isospin of the D∗K, $ \overline D $*K, B∗$ \overline K $ and $ \overline B $∗$ \overline K $. With the estimated error, the mass of the DD∗K or D$ \overline D $∗K molecule is $ 4317.92_{ - 4.32}^{ + 3.66} $ MeV or $ 4317.92_{ - 6.55}^{ + 6.13} $MeV. We also extend our calculations to the bottom sector and find tri-meson bound states for the BB∗$ \overline K $ and B$ \overline B $*$ \overline K $ with the mass $ 11013.65_{ - 8.84}^{ + 8.49} $ MeV and $ 11013.65_{ - 9.02}^{ + 8.68} $MeV respectively.
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8

Russ, James S. "First Observation of the DsJ(2632) Meson." International Journal of Modern Physics A 20, no. 16 (June 30, 2005): 3675–76. http://dx.doi.org/10.1142/s0217751x05027278.

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Анотація:
The SELEX Collaboration has announced the first observation of a massive, narrow resonance in the charm-strange system. Seen both in D S η and D 0 K + final states, the meson is unusual both in that it is very narrow despite being far above the strong decay threshold and also in that the [Formula: see text]. Production is also unusual, with a large asymmetry favoring [Formula: see text] over [Formula: see text] production from the Σ- beam.
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9

Ortega, P. G., J. Segovia, D. R. Entem, and F. Fernández. "Threshold effects in hadron spectrum: a new spectroscopy?" EPJ Web of Conferences 182 (2018): 02094. http://dx.doi.org/10.1051/epjconf/201818202094.

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Анотація:
The exploration of energies above the open-flavor threshold in the meson spectra has led to the appearance of unexpected states difficult to accommodate in the naive picture of a bound state of a quark and an antiquark. Many of such states are located close to meson-meson thresholds, which suggests that molecular structures may be a relevant component in the total wave function of such resonances. In this work, the state of meson-meson molecules calculations is reviewed, using a nonrelativistic constituent quark model that has been applied to a wide range of hadronic observables, and therefore all model parameters are completely constrained. The model has been able to reproduce, among others, the properties of the X(3872), described as a mixture of cc and DD* states, or the spectrum of the P-wave charm-strange mesons, which are well reproduced only if DK and D*K structures are taken into account. We show that such constituent quark model, which is able to describe the ordinary heavy meson spectra, is also capable of providing a good description of many new states recently reported.
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10

Acharya, Shreyasi. "Heavy-flavour production in small systems and evolution with multiplicity with ALICE." EPJ Web of Conferences 259 (2022): 12012. http://dx.doi.org/10.1051/epjconf/202225912012.

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Анотація:
In this report, highlights on the multiplicity-dependent measurements of heavy-flavour hadrons performed by the ALICE experiment, are presented. The heavy-flavour baryon-to-meson Λc0/D0 and strange-to-non-strange D meson DS+/D0 ratios in different charged-particle multiplicity intervals are discussed. Recent measurements of heavy-flavour self-normalised yields as a function of the self-normalised charged-particle multiplicity in pp collisions at √S = 13 TeV are also reported. Measurement of jets containing heavy-flavour hadrons in pp and p–Pb collisions at √SNN = 5.02 TeV and the recent measurements of azimuthal correlations of heavy-flavour hadron decay electrons and charged hadrons in pp collisions at √S = 5.02 TeV are presented.
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Дисертації з теми "Strange D meson"

1

Zacchi, Andreas [Verfasser], Carsten [Akademischer Betreuer] [Gutachter] Greiner, and Jürgen [Gutachter] Schaffner-Bielich. "Thermal evolution of massive compact strange objects in a SU(3) chiral Quark Meson Model / Andreas Zacchi ; Gutachter: Jürgen Schaffner-Bielich, Carsten Greiner ; Betreuer: Carsten Greiner." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2017. http://d-nb.info/113827688X/34.

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2

Wirth, Joana Katharina [Verfasser], Laura [Akademischer Betreuer] Fabbietti, Peter [Gutachter] Fierlinger, and Laura [Gutachter] Fabbietti. "(Strange) Meson Production in Pion-Nucleus Collisions at 1.7 GeV/c : Strong Absorption of Hadrons with Hidden and Open Strangeness / Joana Katharina Wirth ; Gutachter: Peter Fierlinger, Laura Fabbietti ; Betreuer: Laura Fabbietti." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1200099036/34.

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3

Oswald, Christian [Verfasser]. "Semileptonic Decays of Strange Beauty Mesons at Belle / Christian Oswald." Bonn : Universitäts- und Landesbibliothek Bonn, 2015. http://d-nb.info/1077290225/34.

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4

DETTORI, FRANCESCO. "Measurement of strange hadron production and perspectives for the search of D⁰→ µ⁺µ⁻ decay at LHCb." Doctoral thesis, Università degli Studi di Cagliari, 2011. http://hdl.handle.net/11584/266256.

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The study of V⁰ particles in pp collisions is important for the comprehension of soft processes involved in strange quark production. Baryon asymmetry, measured as the ⊼/Λ production ratio, is crucial to understand the mechanism with which the baryon number information of the initial state is transported to the final state. Strange baryon over meson suppression, measured as the ⊼/K⁰s production ratio, is an important probe of the hadronisation mechanisms in high energy collisions. In this dissertation we report measurements of ⊼/Λ and ⊼/K⁰s production ratios as obtained by the LHCb experiment in pp collisions at √s = 0.9 and 7 TeV. Some theoretical aspects, the analysis procedure and results are presented and compared with phenomenological models using predictions based on Monte Carlo simulations. We also present a measurement of the transverse polarisation of Λ baryons, which is important to understand the role of spin in high energy collisions. Furthermore a preliminary outlook of the search of the very rare D⁰→ µ⁺µ⁻ decay is reported. This process involving flavour changing neutral currents is sensitive to contributions from different new physics scenarios. A selection for this decay and its possible background contributions are presented as obtained from the study of pp collisions at √s = 7 TeV. We present the results and discuss the prospects for the detection of this decay and the possibility to constraint the parameters of new physics scenarios.---------------------------- Lo studio di particelle V⁰ in collisioni pp è importante per la comprensione dei processi soffici coinvolti nella produzioni di quark strange. L'asimmetria barionica, misurata come il rapporto di produzione ⊼/Λ, è cruciale per capire il meccanismo con cui l'informazione sul numero barionico è trasportata dallo stato iniziale a quello finale. La soppressione dei barioni rispetto ai mesoni, misurata come il rapporto di produzione ⊼/K⁰s, è un'importante indicazione sui meccanismi di adronizzazione in collisioni ad alta energia. In questa dissertazione riportiamo misure dei rapporti di produzione ⊼/Λ e ⊼/K⁰s ottenute dall'esperimento LHCb in collisioni pp a √s = 0.9 e 7 TeV. Alcuni aspetti teorici, le procedure di analisi e i risultati sono presentati e confrontati a modelli fenomenologici usando predizioni basate su simulazioni Monte Carlo. Presentiamo inoltre una misura della polarizzazione trasversa dei barioni Λ, importante per capire il ruolo degli effetti di spin in collisioni ad alta energia. Infine riportiamo studi preliminari per la ricerca del decadimento estremamente raro D⁰→ µ⁺µ⁻. Questo processo, che coinvolge cambi di sapore in correnti neutre, è sensibile a contributi dovuti a scenari di nuova fisica. Vengono presentati una selezione per questo decadimento e il suo possibile fondo ottenuti dallo studio di collisioni pp a √s = 7 TeV. Presentiamo i risultati e discutiamo le prospettive per la rivelazione di questo decadimento e i possibili vincoli ponibili ai parametri degli scenari di nuova fisica.
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Книги з теми "Strange D meson"

1

Grosa, Fabrizio. Strange and Non-Strange D-meson Production in pp, p-Pb, and Pb-Pb Collisions with ALICE at the LHC. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71131-3.

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2

Grosa, Fabrizio. Strange and Non-Strange d-Meson Production in Pp, P-Pb, and Pb-Pb Collisions with ALICE at the LHC. Springer International Publishing AG, 2022.

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3

Grosa, Fabrizio. Strange and Non-Strange d-Meson Production in Pp, P-Pb, and Pb-Pb Collisions with ALICE at the LHC. Springer International Publishing AG, 2021.

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Частини книг з теми "Strange D meson"

1

Jaelani, Syaefudin. "Measurement of Non-strange D-Meson Production and Azimuthal Anisotropy in Pb–Pb Collisions with ALICE at the LHC." In Springer Proceedings in Physics, 103–7. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53448-6_14.

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Тези доповідей конференцій з теми "Strange D meson"

1

Suzuki, Kei, Philipp Gubler, and Makoto Oka. "D Meson Properties in Nuclear Medium from QCD Sum Rules." In Proceedings of the 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015). Journal of the Physical Society of Japan, 2017. http://dx.doi.org/10.7566/jpscp.17.112007.

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2

Sudoh, Kazutaka. "D Meson Production in Neutrino DIS as a Probe of Polarized Strange Quark Distribution." In SPIN 2002: 15th International Spin Physics Symposium and Workshop on Polarized Electron Sources and Polarimeters. AIP, 2003. http://dx.doi.org/10.1063/1.1607161.

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3

Gong, Ming, Anyi Li, Andrei Alexandru, Ying Chen, Terrence Draper, and Keh-Fei Liu. "Study of the scalar charmed-strange meson D\ast s0(2317) with chiral fermions." In The XXVIII International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2011. http://dx.doi.org/10.22323/1.105.0106.

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4

Ratcliff, B. N., D. Aston, N. Awaji, T. Bienz, F. Bird, J. D’Amore, W. Dunwoodie та ін. "Spectroscopy of the D-wave qq̄ system; evidence for two JP=2− strange meson states decaying to K−ω∗". У Proceedings of the XXVI international conference on high energy physics. AIP, 1992. http://dx.doi.org/10.1063/1.43382.

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5

Grosa, Fabrizio. "Study of $R_{\rm AA}$ and $v_{2}$ of non-strange D mesons and D-jet production in $\rm Pb-Pb$ collisions with ALICE." In European Physical Society Conference on High Energy Physics. Trieste, Italy: Sissa Medialab, 2020. http://dx.doi.org/10.22323/1.364.0280.

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Звіти організацій з теми "Strange D meson"

1

Kaya, Mithat. D(s) charm strange meson production and asymmetry. Office of Scientific and Technical Information (OSTI), January 2000. http://dx.doi.org/10.2172/1421433.

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