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Author |
Carlomagno, J.P.; Gomez Dumm, D.; Izzo Villafañe, M.F.; Noguera, S.; Scoccola, N.N. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Charged pseudoscalar and vector meson masses in strong magnetic fields in an extended NJL model |
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Journal Article |
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Year ![sorted by Year field, descending order (down)](img/sort_desc.gif) |
2022 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
106 |
Issue |
9 |
Pages |
094035 - 17pp |
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Abstract |
The mass spectrum of pi(+) and rho(+) mesons in the presence of a static uniform magnetic field (B) over right arrow is studied within a two-flavor Nambu-Jona-Lasinio-like model. We improve previous calculations, taking into account the effect of Schwinger phases carried by quark propagators and using an expansion of meson fields in terms of the solutions of the corresponding equations of motion for nonzero B. It is shown that the meson polarization functions are diagonal in this basis. Our numerical results for the rho(+) meson spectrum are found to disfavor the existence of a meson condensate induced by the magnetic field. In the case of the pi(+) meson, pi-rho mixing effects are analyzed for the meson lowest-energy state. The predictions of the model are compared with available lattice QCD results. |
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Address |
[Carlomagno, J. P.; Dumm, D. Gomez] Univ Nacl La Plata, IFLP, CONICET, Dept Fis,Fac Cs Exactas, CC 67, RA-1900 La Plata, Argentina |
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Amer Physical Soc |
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2470-0010 |
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WOS:000917769000013 |
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no |
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yes |
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yes |
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Call Number |
IFIC @ pastor @ |
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5470 |
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Author |
Middeldorf-Wygas, M.M.; Oldengott, I.M.; Bödeker, D.; Schwarz, D.J. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Cosmic QCD transition for large lepton flavor asymmetries |
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Journal Article |
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Year ![sorted by Year field, descending order (down)](img/sort_desc.gif) |
2022 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
105 |
Issue |
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Pages |
123533 - 10pp |
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Abstract |
We study the impact of large lepton flavor asymmetries on the cosmic QCD transition. Scenarios of unequal lepton flavor asymmetries are observationally almost unconstrained and therefore open up a whole new parameter space for the cosmic QCD transition. We find that for large asymmetries, the formation of a Bose-Einstein condensate of pions can occur and identify the corresponding parameter space. In the vicinity of the QCD transition scale, we express the pressure in terms of a Taylor expansion with respect to the complete set of chemical potentials. The Taylor coefficients rely on input from lattice QCD calculations from the literature. The domain of applicability of this method is discussed. |
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yes |
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IFIC @ pastor @ |
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5497 |
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Author |
Parashar, S.; Karan, A.; Avnish; Bandyopadhyay, P.; Ghosh, K. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Phenomenology of scalar leptoquarks at the LHC in explaining the radiative neutrino masses, muon g-2, and lepton flavor violating observables |
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Journal Article |
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Year ![sorted by Year field, descending order (down)](img/sort_desc.gif) |
2022 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
106 |
Issue |
9 |
Pages |
095040 - 34pp |
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We study the phenomenology of a particular leptoquark extension of the Standard Model (SM), namely the doublet-singlet scalar leptoquark extension of the SM (DSL-SM). Besides generating Majorana mass for neutrinos, these leptoquarks contribute to muon and electron (g – 2) and various lepton flavor violating processes. Collider signatures of the benchmark points (BPs), consistent with the neutrino oscillation data, anomalous muon/electron magnetic moments, experimental bounds on the charged lepton flavor violation observables, etc., are studied at the LHC/FCC with center-of-mass energies of 14, 27 and 100 TeV. While the two -1=3 charged colored scalars from the singlet and the doublet leptoquark mix with each other, the charge 2=3 colored scalar from the doublet leptoquark remains pure. With a near-degenerate mass spectrum, the pure and mixed leptoquark states are shown to be distinguishable from multiple final states, while discerning between the two mixed states remains very challenging. |
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Address |
[Parashar, Snehashis; Bandyopadhyay, Priyotosh] Indian Inst Technol Hyderabad, Sangareddy 502284, Telangana, India, Email: ph20resch11006@iith.ac.in; |
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Amer Physical Soc |
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2470-0010 |
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WOS:000956618800005 |
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no |
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yes |
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yes |
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Call Number |
IFIC @ pastor @ |
Serial |
5506 |
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Author |
LHCb Collaboration (Aaij, R. et al); Henry, L.; Jashal, B.K.; Martinez-Vidal, F.; Oyanguren, A.; Remon Alepuz, C.; Ruiz Vidal, J. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Observation of a new Xi(0)(b) state |
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Journal Article |
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Year ![sorted by Year field, descending order (down)](img/sort_desc.gif) |
2021 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
103 |
Issue |
1 |
Pages |
012004 - 17pp |
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Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb(-1), the observation of a new excited Xi(0)(b) resonance decaying to the Xi(-)(b)pi(+) final state is presented. The state, referred to as Xi(b) (6227)(0), has a measured mass and natural width of m(Xi(b)(6227)(0)) = 6227.1(-1.5)(+1.4) +/- 0.5 MeV and Gamma(Xi(b)(6227)(0)) = 18.6(-4.1)(+5.0) +/- 1.4 MeV, where the uncertainties are statistical and systematic. The production rate of the Xi(b)(6227)(0) state relative to that of the Xi(-)(b) baryon in the kinematic region 2 < eta < 5 and p(T) < 30 GeV is measured to be f(Xi b(6227)0)/f(Xi b)(-) B(Xi(b)(6227)(0) -> Xi(-)(b)pi(+)) = 0.045 +/- 0.008 +/- 0.004, where B(Xi(b)(6227)(0) -> Xi(-)(b)pi(+)) is the branching fraction of the decay, and f(Xi b(6227)0) and f(Xi b-) represent fragmentation fractions. Improved measurements of the mass and natural width of the previously observedf Xi(b)(6227)(-) state, along with the mass of the Xi(-)(b) baryon, are also reported. Both measurements are significantly more precise than, and consistent with, previously reported values. |
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Address |
[Leite, J. Baptista; Bediaga, I; Torres, M. Cruz; De Miranda, J. M.; dos Reis, A. C.; Gomes, A.; Massafferri, A.; Machado, D. Torres] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil |
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Amer Physical Soc |
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2470-0010 |
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WOS:000605120700001 |
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no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
4684 |
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Author |
Linster, M.; Lopez-Pavon, J.; Ziegler, R. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Neutrino observables from a U(2) flavor symmetry |
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Journal Article |
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Year ![sorted by Year field, descending order (down)](img/sort_desc.gif) |
2021 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
103 |
Issue |
1 |
Pages |
015020 - 9pp |
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Abstract |
We study the predictions for CP phases and absolute neutrino mass scale for broad classes of models with a U(2)-like flavor symmetry. For this purpose we consider the same special textures in neutrino and charged lepton mass matrices that are successful in the quark sector. While in the neutrino sector the U(2) structure enforces two texture zeros, the contribution of the charged lepton sector to the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) matrix can be parametrized by two rotation angles. Restricting to the cases where at least one of these angles is small, we obtain three representative scenarios. In all scenarios we obtain a narrow prediction for the sum of neutrino masses in the range of 60-75 meV, possibly in the reach of upcoming galaxy survey experiments. All scenarios can be excluded if near-future experimental date provide evidence for either neutrinoless double-beta decay or inverted neutrino mass ordering. |
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[Linster, Matthias; Ziegler, Robert] Karlsruhe Inst Technol, Inst Theoret Teilchenphys, D-76131 Karlsruhe, Germany |
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Amer Physical Soc |
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2470-0010 |
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WOS:000609014300006 |
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no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
4689 |
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Author |
T2K Collaboration (Abe, K. et al); Antonova, M.; Cervera-Villanueva, A. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
T2K measurements of muon neutrino and antineutrino disappearance using 3.13 x 10(21) protons on target |
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Journal Article |
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2021 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
103 |
Issue |
1 |
Pages |
L011101 - 9pp |
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Abstract |
We report measurements by the T2K experiment of the parameters theta(23) and Delta m(32)(2), which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNS neutrino oscillation model at T2K's neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. Data taken from 1.49 x 10(21) protons on target (POT) in neutrino mode and 1.64 x 10(21) POT in antineutrino mode are used. The best-fit values obtained by T2K were sin(2)(theta(23)) = 0.51(-0.07)(+0.06) (0.43(-0.05)(+0.21)) and Delta m(32)(2) = 2.47(-0.09)(+0.08) (2.50(-0.13)(+0.18)) x 10(-3) eV(2)/c(4) for neutrinos (antineutrinos). No significant differences between the values of the parameters describing the disappearance of muon neutrinos and antineutrinos were observed. An analysis using an effective two-flavor neutrino oscillation model where the sine of the mixing angle is allowed to take nonphysical values larger than 1 is also performed to check the consistency of our data with the three-flavor model. Our data were found to be consistent with a physical value for the mixing angle. |
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[Berguno, D. Bravo; Labarga, L.] Univ Autonoma Madrid, Dept Theoret Phys, E-28049 Madrid, Spain |
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Amer Physical Soc |
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2470-0010 |
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WOS:000612138600005 |
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no |
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yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
4734 |
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Author |
Han, C.; Lopez-Ibañez, M.L.; Melis, A.; Vives, O.; Yang, J.M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Anomaly-free leptophilic axionlike particle and its flavor violating tests |
Type |
Journal Article |
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Year ![sorted by Year field, descending order (down)](img/sort_desc.gif) |
2021 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
103 |
Issue |
3 |
Pages |
035028 - 7pp |
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Abstract |
Motivated by the recent Xenon1T result, we study a leptophilic flavor-dependent anomaly-free axionlike particle (ALP) and its effects on charged-lepton flavor violation. We present two representative models. The first one considers that the ALP origins from the flavon that generates the charged-lepton masses. The second model assumes a larger flavor symmetry such that more general mixings in the charged-lepton are possible, while maintaining flavor-dependent ALP couplings. We find that a keV ALP explaining the Xenon1T result is still viable for lepton flavor violation and stellar cooling astrophysical limits. On the other hand, if the Xenon1T result is confirmed, future charged-lepton flavor violation measurements can be complementary to probe such a possibility. |
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Address |
[Han, C.] Sun Yat Sen Univ, Sch Phys, Guangzhou 510275, Guangdong, Peoples R China, Email: hanchch@mail.sysu.edu.cn; |
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Amer Physical Soc |
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2470-0010 |
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WOS:000621593200009 |
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no |
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yes |
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yes |
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Call Number |
IFIC @ pastor @ |
Serial |
4739 |
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Author |
Roca, L.; Oset, E. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Scalar resonances in the D+ -> K-K+K+ decay |
Type |
Journal Article |
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2021 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
103 |
Issue |
3 |
Pages |
034020 - 9pp |
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Abstract |
We study theoretically the resonant structure of the double Cabibbo suppressed D+ -> K-K+K+ decay. We start from an elementary production diagram, considered subleading in previous approaches, which cannot produce a final K-K+ pair at the tree level but which we show to be able to provide the strength of the decay through final meson-meson state interaction. The different meson-meson elementary productions are related through SU(3), and the final rescattering is implemented from a suitable implementation of unitary extensions of chiral perturbation theory, which generate dynamically the scalar resonances1 f(0)(980) and a(0)(980). We obtain a good agreement with recent experimental data from the LHCb Collaboration with a minimal freedom in the fit and show the dominance of the a(0)(980) contribution close to the threshold of the K-K+ spectrum. |
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[Roca, L.] Univ Murcia, Dept Fis, E-30071 Murcia, Spain, Email: luisroca@um.es; |
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Amer Physical Soc |
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2470-0010 |
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WOS:000621332000004 |
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no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
4742 |
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Author |
Wang, E.; Li, H.S.; Liang, W.H.; Oset, E. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Analysis of the gamma gamma -> D(D)over-bar reaction and the D(D)over-bar bound state |
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Journal Article |
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2021 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
103 |
Issue |
5 |
Pages |
054008 - 10pp |
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Abstract |
In this work, we investigate the reaction of gamma gamma -> D (D) over bar, taking into account the S-wave D (D) over bar final state interaction. By fitting to the D (D) over bar, invariant mass distributions measured by the Belle and BABAR Collaborations, we obtain a good reproduction of the data by means of a D (D) over bar, amplitude that produces a bound D (D) over bar, statewith isospin I = 0 close to threshold. The error bands of the fits indicate, however, that more precise data on this reaction are needed to be more assertive about the position and width of such a state. |
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Address |
[Wang, En; Li, Hong-Shen] Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Henan, Peoples R China, Email: wangen@zzu.edu.cn; |
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Amer Physical Soc |
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2470-0010 |
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WOS:000627574000002 |
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no |
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yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
4759 |
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Author |
Bodeker, D.; Kuhnel, F.; Oldengott, I.M.; Schwarz, D.J. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Lepton flavor asymmetries and the mass spectrum of primordial black holes |
Type |
Journal Article |
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Year ![sorted by Year field, descending order (down)](img/sort_desc.gif) |
2021 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
103 |
Issue |
6 |
Pages |
063506 - 6pp |
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Abstract |
We study the influence of lepton flavor asymmetries on the formation and the mass spectrum of primordial black holes. We estimate the detectability of their mergers with LIGO/Virgo and show that the currently published gravitational wave events may actually be described by a primordial black hole spectrum from nonzero asymmetries. We suggest to use gravitational-wave astronomy as a novel tool to probe how lepton flavor asymmetric the Universe has been before the onset of neutrino oscillations. |
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Address |
[Boedeker, Dietrich; Schwarz, Dominik J.] Univ Bielefeld, Fak Phys, Postfach 100131, D-33501 Bielefeld, Germany, Email: bodeker@physik.uni-bielefeld.de; |
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Amer Physical Soc |
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2470-0010 |
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Notes |
WOS:000627581200003 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
4761 |
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Permanent link to this record |