Статті в журналах: "Flavour oscillations"

1

Schubert, Klaus R. "Flavour oscillations." Progress in Particle and Nuclear Physics 21 (January 1988): 3–31. http://dx.doi.org/10.1016/0146-6410(88)90030-0.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Pal, B. K. "Flavour mixing neutrino oscillations." Il Nuovo Cimento A 103, no. 8 (August 1990): 1113–20. http://dx.doi.org/10.1007/bf02820538.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Filip, Peter. "Flavour Oscillations in Dense Baryonic Matter." Journal of Physics: Conference Series 779 (January 2017): 012047. http://dx.doi.org/10.1088/1742-6596/779/1/012047.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Mangano, Gianpiero, Gennaro Miele, Sergio Pastor, Teguayco Pinto, Ofelia Pisanti, and Pasquale D. Serpico. "Relic neutrino decoupling including flavour oscillations." Nuclear Physics B 729, no. 1-2 (November 2005): 221–34. http://dx.doi.org/10.1016/j.nuclphysb.2005.09.041.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

5

de Salas, Pablo F., and Sergio Pastor. "Relic neutrino decoupling with flavour oscillations revisited." Journal of Cosmology and Astroparticle Physics 2016, no. 07 (July 28, 2016): 051. http://dx.doi.org/10.1088/1475-7516/2016/07/051.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Osland, P., and G. Vigdel. "Solar-neutrino oscillations and third-flavour admixture." Physics Letters B 438, no. 1-2 (October 1998): 129–35. http://dx.doi.org/10.1016/s0370-2693(98)00973-3.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Neubert, Matthias. "Nonleptonic weak decays, flavour oscillations, and diquarks." Nuclear Physics B - Proceedings Supplements 21 (June 1991): 351–58. http://dx.doi.org/10.1016/0920-5632(91)90276-k.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Gluza, J., and M. Zrałek. "Parameters' domain in three flavour neutrino oscillations." Physics Letters B 517, no. 1-2 (September 2001): 158–66. http://dx.doi.org/10.1016/s0370-2693(01)00962-5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Abdullaeva, Umsalimat, Vadim Shakhov, Alexander Studenikin, and Alexander Tsvirov. "Dirac and Majorana neutrino oscillations in magnetized moving and polarized matter." Journal of Physics: Conference Series 2156, no. 1 (December 1, 2021): 012229. http://dx.doi.org/10.1088/1742-6596/2156/1/012229.

Повний текст джерела

Анотація:

Abstract In the present paper we develop the quantum theory of neutrino spin and spin-flavour oscillations in moving magnetized matter with a special focus on the effects of matter polarization. We derive an effective neutrino evolution Hamiltonian and corresponding expressions for the neutrino oscillation probabilities. Both the case of Dirac and Majorana neutrinos are considered. From the comparison of the neutrino spin oscillation probabilities in the transversally moving matter for the Dirac and Majorana neutrinos it follows that the oscillation patterns is different for theses two cases. In particular, the conditions for the resonances in these two cases are realized at different densities of matter.

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Boriero, Daniel, Dominik J. Schwarz, and Hermano Velten. "Flavour Composition and Entropy Increase of Cosmological Neutrinos After Decoherence." Universe 5, no. 10 (September 25, 2019): 203. http://dx.doi.org/10.3390/universe5100203.

Повний текст джерела

Анотація:

We propose that gravitational interactions of cosmic neutrinos with the statistically homogeneous and isotropic fluctuations of space-time lead to decoherence. This working hypothesis, which we describe by means of a Lindblad operator, is applied to the system of two- and three-flavour neutrinos undergoing vacuum oscillations and the consequences are investigated. As a result of this decoherence we find that the neutrino entropy would increase as a function of initial spectral distortions, mixing angles and charge-parity (CP)-violation phase. Subsequently we discuss the chances to discover such an increase observationally (in principle). We also present the expected flavour composition of the cosmic neutrino background after decoherence is completed. The physics of two- or three-flavour oscillation of cosmological neutrinos resembles in many aspects two- or three-level systems in atomic clocks, which were recently proposed by Weinberg for the study of decoherence phenomena.

Стилі APA, Harvard, Vancouver, ISO та ін.

11

HULSBERGEN, WOUTER. "CONSTRAINING NEW PHYSICS IN $B_{s}^0$ MESON MIXING." Modern Physics Letters A 28, no. 27 (August 26, 2013): 1330023. http://dx.doi.org/10.1142/s0217732313300231.

Повний текст джерела

Анотація:

Neutral mesons exhibit a phenomenon called flavour mixing. As a consequence of a second order weak process the flavour eigenstates corresponding to the meson and its anti-meson are superpositions of two mass eigenstates. A meson produced in a flavour state changes into an anti-meson and back again as a function of time. Such flavour oscillations are considered sensitive probes of physics beyond the Standard Model. In this brief review I summarize the status of experimental constraints on mixing parameters in the [Formula: see text] meson system.

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Froustey, Julien, Cyril Pitrou, and Maria Cristina Volpe. "Neutrino decoupling including flavour oscillations and primordial nucleosynthesis." Journal of Cosmology and Astroparticle Physics 2020, no. 12 (December 4, 2020): 015. http://dx.doi.org/10.1088/1475-7516/2020/12/015.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

13

Simone, Andrea De, and Antonio Riotto. "On the impact of flavour oscillations in leptogenesis." Journal of Cosmology and Astroparticle Physics 2007, no. 02 (February 5, 2007): 005. http://dx.doi.org/10.1088/1475-7516/2007/02/005.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Barone, M. "The LSND results and three-flavour neutrino oscillations." Nuclear Physics B - Proceedings Supplements 85, no. 1-3 (May 2000): 172–76. http://dx.doi.org/10.1016/s0920-5632(00)00502-8.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Ahluwalia, Dharam Vir, and Cheng-Yang Lee. "A QFT-induced phase in neutrino flavour oscillations." EPL (Europhysics Letters) 119, no. 6 (September 1, 2017): 61001. http://dx.doi.org/10.1209/0295-5075/119/61001.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Baki, P. "Letter: Lorentz Non-Invariance Effect in Flavour Oscillations." General Relativity and Gravitation 35, no. 5 (May 2003): 891–98. http://dx.doi.org/10.1023/a:1022955422886.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Aad, G., B. Abbott, D. C. Abbott, A. Abed Abud, K. Abeling, D. K. Abhayasinghe, S. H. Abidi, et al. "Search for charged-lepton-flavour violation in Z-boson decays with the ATLAS detector." Nature Physics 17, no. 7 (July 2021): 819–25. http://dx.doi.org/10.1038/s41567-021-01225-z.

Повний текст джерела

Анотація:

AbstractLeptons with essentially the same properties apart from their mass are grouped into three families (or flavours). The number of leptons of each flavour is conserved in interactions, but this is not imposed by fundamental principles. Since the formulation of the standard model of particle physics, the observation of flavour oscillations among neutrinos has shown that lepton flavour is not conserved in neutrino weak interactions. So far, there has been no experimental evidence that this also occurs in interactions between charged leptons. Such an observation would be a sign of undiscovered particles or a yet unknown type of interaction. Here the ATLAS experiment at the Large Hadron Collider at CERN reports a constraint on lepton-flavour-violating effects in weak interactions, searching for Z-boson decays into a τ lepton and another lepton of different flavour with opposite electric charge. The branching fractions for these decays are measured to be less than 8.1 × 10−6 (eτ) and 9.5 × 10−6 (μτ) at the 95% confidence level using 139 fb−1 of proton–proton collision data at a centre-of-mass energy of $$\sqrt{s}=13\,{\rm{TeV}}$$ s = 13 TeV and 20.3 fb−1 at $$\sqrt{s}=8\,{\rm{TeV}}.$$ s = 8 TeV . These results supersede the limits from the Large Electron–Positron Collider experiments conducted more than two decades ago.

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Shakhov, Vadim, Konstantin Stankevich, and Alexander Studenikin. "Spin and spin-flavor oscillations due to neutrino charge radii interaction with an external environment." Journal of Physics: Conference Series 2156, no. 1 (December 1, 2021): 012241. http://dx.doi.org/10.1088/1742-6596/2156/1/012241.

Повний текст джерела

Анотація:

Abstract We derive the effective neutrino evolution Hamiltonian and corresponding expressions for the neutrino flavour and spin-flavour oscillation probabilities accounting for the neutrino interactions with an external electric current though the neutrino charge radius and anapole moment. The obtained results are of interest for neutrino astrophysical applications.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Pascoli, Silvia, and Thomas Schwetz. "Prospects for Neutrino Oscillation Physics." Advances in High Energy Physics 2013 (2013): 1–29. http://dx.doi.org/10.1155/2013/503401.

Повний текст джерела

Анотація:

Recently the last unknown lepton mixing angleθ13has been determined to be relatively large, not too far from its previous upper bound. This opens exciting possibilities for upcoming neutrino oscillation experiments towards addressing fundamental questions, among them the type of the neutrino mass hierarchy and the search for CP violation in the lepton sector. In this paper we review the phenomenology of neutrino oscillations, focusing on subleading effects, which will be the key towards these goals. Starting from a discussion of the present determination of three-flavour oscillation parameters, we give an outlook on the potential of near-term oscillation physics as well as on the long-term program towards possible future precision oscillation facilities. We discuss accelerator-driven long-baseline experiments as well as nonaccelerator possibilities from atmospheric and reactor neutrinos.

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Giunti, Carlo. "Neutrino flavour states and the quantum theory of neutrino oscillations." Journal of Physics G: Nuclear and Particle Physics 34, no. 2 (January 9, 2007): R93—R109. http://dx.doi.org/10.1088/0954-3899/34/2/r02.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Choubey, Sandhya, Debasish Majumdar, and Kamales Kar. "Effect of flavour oscillations on the detection of supernova neutrinos." Journal of Physics G: Nuclear and Particle Physics 25, no. 5 (January 1, 1999): 1001–8. http://dx.doi.org/10.1088/0954-3899/25/5/305.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Mohapatra, R. N., and A. Pérez-Lorenzana. "Three flavour neutrino oscillations in models with large extra dimensions." Nuclear Physics B 593, no. 3 (January 2001): 451–70. http://dx.doi.org/10.1016/s0550-3213(00)00634-9.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Grigoriev, A., A. Lobanov, and A. Studenikin. "Effect of matter motion and polarization in neutrino flavour oscillations." Physics Letters B 535, no. 1-4 (May 2002): 187–92. http://dx.doi.org/10.1016/s0370-2693(02)01776-8.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Goryachev, Boris I. "The Model of Neutrino Vacuum Flavour Oscillations and Quantum Mechanics." Journal of Modern Physics 06, no. 13 (2015): 1942–49. http://dx.doi.org/10.4236/jmp.2015.613200.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Azimov, Y. I. "Phenomenology of neutral D-meson decays and double-flavour oscillations." European Physical Journal A 4, no. 1 (January 1999): 21–31. http://dx.doi.org/10.1007/s100500050200.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Simonov, Kyrylo, and Beatrix C. Hiesmayr. "Can a spontaneous collapse in flavour oscillations be tested at KLOE?" EPJ Web of Conferences 166 (2018): 00006. http://dx.doi.org/10.1051/epjconf/201816600006.

Повний текст джерела

Анотація:

Why do we never see a table in a superposition of here and there? This problem gets a solution by so called collapse models assuming the collapse as a genuinely physical process. Here we consider two specific collapse models and apply them to systems at high energies, i.e. flavour oscillating neutral meson systems. We find on one hand a potentially new interpretation of the decay rates introduced by hand in the standard formalism and on the other hand that these systems at high energies constrain by experimental data the possible collapse scenarios.

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Akhmedov, E. Kh. "Three-Flavour Effects and CP- and T-Violation in Neutrino Oscillations." Physica Scripta T121 (January 1, 2005): 65–71. http://dx.doi.org/10.1088/0031-8949/2005/t121/009.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Bhupal Dev, P. S., Peter Millington, Apostolos Pilaftsis, and Daniele Teresi. "Kadanoff–Baym approach to flavour mixing and oscillations in resonant leptogenesis." Nuclear Physics B 891 (February 2015): 128–58. http://dx.doi.org/10.1016/j.nuclphysb.2014.12.003.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Ahmed, K., and M. Anwar Mughal. "Matter-induced spin-flavour neutrino oscillations at finite temperature and density." Nuclear Physics B 388, no. 2 (December 1992): 509–20. http://dx.doi.org/10.1016/0550-3213(92)90624-k.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Fogli, G. L., E. Lisi, and D. Montanino. "A consistent three-flavour approach to possible evidence of neutrino oscillations." Astroparticle Physics 4, no. 2 (December 1995): 177–88. http://dx.doi.org/10.1016/0927-6505(95)00024-7.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

31

RAYCHAUDHURI, AMITAVA. "NEUTRINO MASS: PEEPING BEYOND THE STANDARD MODEL." International Journal of Modern Physics B 14, no. 19n20 (August 10, 2000): 2051–61. http://dx.doi.org/10.1142/s0217979200001199.

Повний текст джерела

Анотація:

Evidence in support of a nonzero neutrino mass, through the phenomenon of oscillations, is steadily becoming more compelling. A pedagogic introduction to vacuum neutrino oscillations and resonant flavour conversion is presented in this paper, prefaced by a thumbnail sketch of the relevant properties of the neutrino as embodied in the Standard Model of particle physics. The recent results from solar and atmospheric neutrinos are summarised and their combined implications on neutrino properties are outlined. Some attempts to incorporate a nonzero neutrino mass in extensions of the Standard Model are briefly discussed.

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Segarra, Alejandro, and Thomas Schwetz. "Model-independent test of T violation in neutrino oscillations." Journal of Physics: Conference Series 2156, no. 1 (December 1, 2021): 012124. http://dx.doi.org/10.1088/1742-6596/2156/1/012124.

Повний текст джерела

Анотація:

Abstract We propose a method to establish time reversal symmetry violation at future neutrino oscillation experiments in a largely model-independent way. We introduce a general parametrization of flavour transition probabilities which holds under weak assumptions and covers a large class of new-physics scenarios. This can be used to search for the presence of T-odd components in the transition probabilities by comparing data at different baselines but at the same neutrino energies. We show that this test can be performed already with experiments at three different baselines and might be feasible with experiments under preparation/consideration.

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Studenikin, Alexander. "Neutrino spin and spin-flavour oscillations in transversally moving or polarized matter." Journal of Physics: Conference Series 888 (September 2017): 012221. http://dx.doi.org/10.1088/1742-6596/888/1/012221.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Lambiase, G. "Pulsar kicks induced by spin flavour oscillations of neutrinos in gravitational fields." Monthly Notices of the Royal Astronomical Society 362, no. 3 (September 21, 2005): 867–71. http://dx.doi.org/10.1111/j.1365-2966.2005.09317.x.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Bijnens, Johan. "ChPT loops for the lattice: pion mass and decay constant, HVP at finite volume and nn̅-oscillations." EPJ Web of Conferences 175 (2018): 06011. http://dx.doi.org/10.1051/epjconf/201817506011.

Повний текст джерела

Анотація:

I present higher loop order results for several calculations in Chiral perturbation Theory. 1) Two-loop results at finite volume for hadronic vacuum polarization. 2) A three-loop calculation of the pion mass and decay constant in two-flavour ChPT. For the pion mass all needed auxiliary parameters can be determined from lattice calculations of ππ-scattering. 3) Chiral corrections to neutron-anti-neutron oscillations.

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Alexandre, J. "Lorentz-symmetry violating gauge field as regulator and origin of dynamical flavour oscillations." Journal of Physics: Conference Series 490 (March 11, 2014): 012157. http://dx.doi.org/10.1088/1742-6596/490/1/012157.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Koranga, Bipin Singh, Mohan Narayan, and S. Uma Sankar. "Do Two Flavour Oscillations Explain both KamLAND Data and the Solar Neutrino Spectrum?" International Journal of Theoretical Physics 50, no. 5 (January 8, 2011): 1515–21. http://dx.doi.org/10.1007/s10773-010-0660-3.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Harrison, P. F., W. G. Scott, and T. J. Weiler. "Real invariant matrices and flavour-symmetric mixing variables with emphasis on neutrino oscillations." Physics Letters B 641, no. 5 (October 2006): 372–80. http://dx.doi.org/10.1016/j.physletb.2006.09.005.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Chakraborty, Madhurima. "Dense neutrino oscillations : beyond two flavor." Journal of Physics: Conference Series 2156, no. 1 (December 1, 2021): 012106. http://dx.doi.org/10.1088/1742-6596/2156/1/012106.

Повний текст джерела

Анотація:

Abstract In a dense supernova environment, neutrinos can undergo flavor conversions known as the collective oscillations. These self induced neutrino flavor conversions (collective oscillations) are almost exclusively studied in the standard two flavor scenario. We study these oscillations in the complete three flavor scenario. The ‘fast’ conversions are fascinating distinctions of the dense neutrino systems. In the fast modes the collective oscillation dynamics are independent of the neutrino mass, growing at the scale of the large neutrino-neutrino interaction strength (105 km−1 ) of the dense core. This is extremely fast, as compared to the usual ‘slow’ collective modes driven by much smaller vacuum oscillation frequencies (100 km−1). We perform the first non-linear simulations of fast conversions in the presence of three neutrino flavors which is motivated from the recent supernova simulations with muon production. We relax the standard ν μ , τ = ν ¯ μ , τ (two-flavor) assumption. Our results show the significance of muon and tau lepton number angular distributions, together with the traditional electron lepton number ones and thus explain the need for a complete three flavor analysis.

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Lichkunov, Alexey, Konstantin Stankevich, Alexander Studenikin, and Maxim Vyalkov. "Neutrino quantum decoherence engendered by neutrino decay to photons, familons and gravitons." Journal of Physics: Conference Series 2156, no. 1 (December 1, 2021): 012240. http://dx.doi.org/10.1088/1742-6596/2156/1/012240.

Повний текст джерела

Анотація:

Abstract We developed the previously proposed theoretical framework based on the quantum field theory of open systems applied to neutrinos. Within this framework we have considered the neutrino evolution and neutrino flavour oscillations taking into account for the decay of a heavier neutrino state to a lighter neutrino state and to a massless particle, namely photons, dark photons, axion-like particles and gravitons. We have shown that the neutrino evolution accounting for the decays will be governed by the Lindblad master equation, in which the decoherence parameters are proportional to the neutrino decay rate.

Стилі APA, Harvard, Vancouver, ISO та ін.

41

GNINENKO, S. N., M. M. KIRSANOV, N. V. KRASNIKOV та V. A. MATVEEV. "PROBING LEPTON FLAVOUR VIOLATION IN νμ + N → τ + ⋯ SCATTERING AND μ → τ CONVERSION ON NUCLEONS". Modern Physics Letters A 17, № 22 (20 липня 2002): 1407–17. http://dx.doi.org/10.1142/s0217732302007855.

Повний текст джерела

Анотація:

We study lepton flavour-violating interactions which could result in the τ-lepton production in the νμN scattering or in μ → τ conversion on nucleons at high energies. Phenomenological bounds on the strength of [Formula: see text] interactions are extracted from the combined result of the NOMAD and CHORUS experiments on searching for νμ - ντ oscillations. Some of these bounds supersede limits from rare decays. We also propose a "missing energy" type experiment searching for μ → τ conversion on nucleons. The experiment can be performed at a present accelerator or at a future neutrino factory.

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Jaramillo, Carlos. "Reviving keV sterile neutrino dark matter." Journal of Cosmology and Astroparticle Physics 2022, no. 10 (October 1, 2022): 093. http://dx.doi.org/10.1088/1475-7516/2022/10/093.

Повний текст джерела

Анотація:

Abstract We propose a new production mechanism for keV sterile neutrino dark matter which relies neither on the oscillations between sterile and active neutrinos nor on the decay of additional heavier particles. The dark matter neutrinos are instead produced by thermal freeze-out, much like a typical WIMP. The challenge consists in balancing a large Yukawa coupling so that the sterile neutrinos thermalize in the early universe on the one hand, and a small enough Yukawa coupling such that they are stable on cosmological scales on the other. We solve this problem by implementing varying Yukawa couplings. We achieve this by using a three-sterile neutrino seesaw extension to the SM and embedding it in a Froggatt-Nielsen model with a single flavon. Because the vev of the flavon changes during the electroweak phase transition, the effective Yukawa couplings of the fermions have different values before and after the phase transition, thus allowing for successful dark matter genesis. Additionally, the hierarchy in the flavour structure is alleviated and the origin of the light neutrino masses is explained by the interplay of the seesaw and Froggatt-Nielsen mechanisms.

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Martínez-Miravé, Pablo. "Cosmological radiation density with non-standard neutrino-electron interactions." Journal of Physics: Conference Series 2156, no. 1 (December 1, 2021): 012011. http://dx.doi.org/10.1088/1742-6596/2156/1/012011.

Повний текст джерела

Анотація:

Abstract Non-standard interactions (NSI) between neutrinos and electrons can significantly modify the decoupling of neutrinos from the plasma. These interactions have two effects on the overall picture: (i) they alter neutrino oscillations though matter effects and (ii) they modify the scattering and annihilation processes involving neutrinos and electrons and positrons. We study the role of non-universal and flavour-changing NSI in the decoupling and how they impact the determination of the effective number of neutrinos, N eff. We examine the degeneracies between NSI parameters and we compare the expected sensitivity from future cosmological surveys with the current limits from terrestrial experiments. We outline the complementarity between both approaches.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Field, J. H. "A covariant path amplitude description of flavour oscillations: the Gribov-Pontecorvo phasefor neutrino vacuum propagation is right." European Physical Journal C 30, no. 3 (October 2003): 305–25. http://dx.doi.org/10.1140/epjc/s2003-01283-4.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

45

CAMPBELL, SARAH C., SARAH R. NUSS-WARREN, LORETTA M. JOHNSON, and DOUGLAS W. MCKAY. "NEUTRINO FLAVOR AND CP/T VIOLATION." International Journal of Modern Physics A 16, supp01b (September 2001): 767–69. http://dx.doi.org/10.1142/s0217751x01008047.

Повний текст джерела

Анотація:

We investigate the implications of direct flavor-violating interactions in addition to neutrino oscillations for neutrino oscillations for neutrino oscillation experiments. We show that MINOS and neutrino factories could achieve at least order of magnitude improvements in constraining neutrino flavor-violating parameters.

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Bernabeu, Jose. "Symmetries and Their Breaking in the Fundamental Laws of Physics." Symmetry 12, no. 8 (August 6, 2020): 1316. http://dx.doi.org/10.3390/sym12081316.

Повний текст джерела

Анотація:

Symmetries in the Physical Laws of Nature lead to observable effects. Beyond the regularities and conserved magnitudes, the last few decades in particle physics have seen the identification of symmetries, and their well-defined breaking, as the guiding principle for the elementary constituents of matter and their interactions. Flavour SU(3) symmetry of hadrons led to the Quark Model and the antisymmetric requirement under exchange of identical fermions led to the colour degree of freedom. Colour became the generating charge for flavour-independent strong interactions of quarks and gluons in the exact colour SU(3) local gauge symmetry. Parity Violation in weak interactions led us to consider the chiral fields of fermions as the objects with definite transformation properties under the weak isospin SU(2) gauge group of the Unifying Electro-Weak SU(2) × U(1) symmetry, which predicted novel weak neutral current interactions. CP-Violation led to three families of quarks opening the field of Flavour Physics. Time-reversal violation has recently been observed with entangled neutral mesons, compatible with CPT-invariance. The cancellation of gauge anomalies, which would invalidate the gauge symmetry of the quantum field theory, led to Quark–Lepton Symmetry. Neutrinos were postulated in order to save the conservation laws of energy and angular momentum in nuclear beta decay. After the ups and downs of their mass, neutrino oscillations were discovered in 1998, opening a new era about their origin of mass, mixing, discrete symmetries and the possibility of global lepton-number violation through Majorana mass terms and Leptogenesis as the source of the matter–antimatter asymmetry in the universe. The experimental discovery of quarks and leptons and the mediators of their interactions, with physical observables in spectacular agreement with this Standard Theory, is the triumph of Symmetries. The gauge symmetry is exact only when the particles are massless. One needs a subtle breaking of the symmetry, providing the origin of mass without affecting the excellent description of the interactions. This is the Brout–Englert–Higgs Mechanism, which produces the Higgs Boson as a remnant, discovered at CERN in 2012. Open present problems are addressed with by searching the New Physics Beyond-the-Standard-Model.

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Khatun, Amina, Adam Smetana, and Fedor Šimkovic. "Three Flavor Quasi-Dirac Neutrino Mixing, Oscillations and Neutrinoless Double Beta Decay." Symmetry 12, no. 8 (August 5, 2020): 1310. http://dx.doi.org/10.3390/sym12081310.

Повний текст джерела

Анотація:

The extension of the Standard model by three right-handed neutrino fields exhibit appealing symmetry between left-handed and right-handed sectors, which is only violated by interactions. It can accommodate three flavor quasi-Dirac neutrino mixing scheme, which allows processes with violation of both lepton flavor and total lepton number symmetries. We propose a 6×6 unitary matrix for parameterizing the mixing among three flavors of quasi-Dirac neutrino. This mixing matrix is constructed by two 3×3 unitary matrices that diagonalizes the Dirac mass term in the Lagrangian. By only assuming the Standard Model V−A weak interaction, it is found that probabilities of neutrino oscillations among active flavor states and effective masses measured by single beta decay, by neutrinoless double-beta decay and by cosmology only depend on single 3×3 unitary matrix relevant to mixing of active neutrino flavors. Further, by considering 1σ and 3σ uncertainties in the measured oscillation probability of electron antineutrino from reactor, derivation of the constraint on the Majorana neutrino mass component is demonstrated. The consequence for effective Majorana neutrino mass governing the neutrinoless double-beta decay is discussed.

Стилі APA, Harvard, Vancouver, ISO та ін.

48

BERNARDINI, A. E., and M. M. GUZZO. "INFLUENCE OF SECOND-ORDER CORRECTIONS TO THE ENERGY-DEPENDENCE OF NEUTRINO FLAVOR CONVERSION FORMULAS." Modern Physics Letters A 23, no. 23 (July 30, 2008): 1949–60. http://dx.doi.org/10.1142/s0217732308026066.

Повний текст джерела

Анотація:

We discuss the intermediate wave-packet formalism for analytically quantifying the energy dependence of the two-flavor conversion formula that is usually considered for analyzing neutrino oscillations and adjusting the focusing horn, target position and/or detector location of some flavor conversion experiments. Following a sequence of analytical approximations where we consider the second-order corrections in a power series expansion of the energy, we point out a residual time-dependent phase which, in addition to some well-known wave-packet effects, can subtly modify the oscillation parameters and limits. In the present precision era of neutrino oscillation experiments where higher precision measurements are required, we quantify some small corrections in neutrino flavor conversion formulas which lead to a modified energy-dependence for νμ ↔ νe oscillations.

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Waxman, Eli. "Neutrino astronomy and gamma-ray bursts." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 365, no. 1854 (February 9, 2007): 1323–34. http://dx.doi.org/10.1098/rsta.2006.1995.

Повний текст джерела

Анотація:

The construction of large-volume detectors of high energy, greater than 1 TeV, neutrinos is mainly driven by the search for extragalactic neutrino sources. The existence of such sources is implied by the observations of ultra-high-energy, greater than or equal to 10 19 eV, cosmic rays, the origin of which is a mystery. In this lecture, I briefly discuss the expected extragalactic neutrino signal and the current state of the experimental efforts. Neutrino emission from gamma-ray bursts (GRBs), which are probably sources of both high-energy protons and neutrinos, is discussed in some detail. The detection of the predicted GRB neutrino signal, which may become possible in the coming few years, will allow one to identify the sources of ultra-high-energy cosmic rays and to resolve open questions related to the underlying physics of GRB models. Moreover, detection of GRB neutrinos will allow one to test for neutrino properties (e.g. flavour oscillations and coupling to gravity) with an accuracy many orders of magnitude better than is currently possible.

Стилі APA, Harvard, Vancouver, ISO та ін.

50

DE LEO, STEFANO, GISELE DUCAT, and PIETRO ROTELLI. "REMARKS UPON THE MASS OSCILLATION FORMULAS." Modern Physics Letters A 15, no. 33 (October 30, 2000): 2057–68. http://dx.doi.org/10.1142/s0217732300002395.

Повний текст джерела

Анотація:

The standard formula for mass oscillations is often based upon the approximation t≈L and the hypotheses that neutrinos have been produced with a definite momentum p or, alternatively, with definite energy E. This represents an inconsistent scenario and gives an unjustified reduction by a factor of two in the mass oscillation formulas. Such an ambiguity has been a matter of speculations and mistakes in discussing flavor oscillations. We present a series of results and show how the problem of the factor two in the oscillation length is not a consequence of Gedanken experiments, i.e. oscillations in time. The common velocity scenario yields the maximum simplicity.

Стилі APA, Harvard, Vancouver, ISO та ін.

Статті в журналах з теми "Flavour oscillations"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями