Results 41 to 50 of about 68,795 (225)

Interpreting hints for lepton flavor universality violation [PDF]

, 2017
We interpret the recent hints for lepton flavor universality violation in rare $B$ meson decays. Based on a model-independent effective Hamiltonian approach, we determine regions of new physics parameter space that give a good description of the ...
W. Altmannshofer, P. Stangl, D. Straub
semanticscholar   +1 more source

The global geometrical property of jet events in high-energy nuclear collisions

European Physical Journal C: Particles and Fields, 2020
We present the first theoretical study of medium modifications of the global geometrical pattern, i.e., transverse sphericity ( $$S_{\perp }$$ S ⊥ ) distribution of jet events with parton energy loss in relativistic heavy-ion collisions.
Shi-Yong Chen, Wei Dai, Shan-Liang Zhang, Qing Zhang, Ben-Wei Zhang   +4 more
doaj   +1 more source

Jet tomography in high-energy nuclear collisions [PDF]

EPJ Web of Conferences, 2019
When an energetic parton traversing the QCD medium, it may suffer multiple scatterings and lose energy. This jet quenching phenomenon may lead to the suppression of leading hadron productions as well as medium modifications of full jet observables in ...
Zhang Ben-Wei, Ma Guo-Yang, Dai Wei, Wang Sa, Zhang Shan-Liang   +4 more
doaj   +1 more source

Search for the lepton flavour violating decay μ+→e+γ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mu ^+ \rightarrow

The European Physical Journal C, 2016
The final results of the search for the lepton flavour violating decay μ+→e+γ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek}
A. Baldini, Y. Bao, E. Baracchini, C. Bemporad, F. Berg, M. Biasotti, G. Boca, M. Cascella, P. Cattaneo, G. Cavoto, F. Cei, C. Cerri, G. Chiarello, C. Chiri, A. Corvaglia, A. Bari, M. Gerone, T. Doke, A. D'onofrio, S. Dussoni, J. Egger, Y. Fujii, L. Galli, F. Gatti, F. Grancagnolo, M. Grassi, A. Graziosi, D. Grigoriev, T. Haruyama, M. Hildebrandt, Z. Hodge, K. Ieki, F. Ignatov, T. Iwamoto, D. Kaneko, T. I. Kang, P. Kettle, B. Khazin, N. Khomutov, A. Korenchenko, N. Kravchuk, G. Lim, A. Maki, S. Mihara, W. Molzon, T. Mori, F. Morsani, A. Mtchedilishvili, D. Mzavia, S. Nakaura, R. Nardo, D. Nicoló, H. Nishiguchi, M. Nishimura, S. Ogawa, W. Ootani, S. Orito, M. Panareo, A. Papa, R. Pazzi, A. Pepino, G. Piredda, G. Pizzigoni, A. Popov, F. Raffaelli, F. Renga, E. Ripiccini, S. Ritt, M. Rossella, Giada Rutar, R. Sawada, F. Sergiampietri, G. Signorelli, M. Simonetta, G. Tassielli, F. Tenchini, Y. Uchiyama, M. Venturini, C. Voena, A. Yamamoto, Kayo Yoshida, Z. You, Y. Yudin, D. Zanello   +83 more
semanticscholar   +1 more source

B c − → J / ψ → μ + μ − τ − → π − ν τ ρ − ν τ ℓ − ν ¯ ℓ ν τ ν ¯ τ $$ {B}_c^{-}\to J/\psi \left(\to {\mu}^{+}{\mu}^{-}\right){\tau}^{-}\left(\to {\pi}^{-}{\nu}_{\tau },{\rho}^{-}{\nu}_{\tau },{\ell}^{-}{\overline{\nu}}_{\ell }{\nu}_{\tau}\right){\overline{\nu}}_{\tau } $$ decays with visible final-state kinematics

Journal of High Energy Physics, 2023
The semitauonic B c − → J / ψ τ − ν ¯ τ $$ {B}_c^{-}\to J/\psi {\tau}^{-}{\overline{\nu}}_{\tau } $$ decay provides an ideal and clean mode to scrutinize possible new physics effects in b → c τ − ν ¯ τ $$ b\to c{\tau}^{-}{\overline{\nu}}_{\tau ...
Xin-Qiang Li, Xin Xu, Ya-Dong Yang, Dong-Hui Zheng   +3 more
doaj   +1 more source

Modular S4 models of lepton masses and mixing [PDF]

Journal of High Energy Physics, 2018
We investigate models of charged lepton and neutrino masses and lepton mixing based on broken modular symmetry. The matter fields in these models are assumed to transform in irreducible representations of the finite modular group Γ4 ≃ S4.
P. Novichkov, J. Penedo, S. Petcov, A. Titov   +3 more
semanticscholar   +1 more source

$${b\rightarrow c\tau \nu }$$ b→cτν transitions in the standard model effective field theory

European Physical Journal C: Particles and Fields, 2019
The $$R(D^{(*)})$$ R(D(∗)) anomalies observed in $$B\rightarrow D^{(*)}\tau \nu $$ B→D(∗)τν decays have attracted much attention in recent years. In this paper, we study the $$B\rightarrow D^{(*)}\tau \nu $$ B→D(∗)τν , $$\Lambda _b\rightarrow \Lambda _c ...
Quan-Yi Hu, Xin-Qiang Li, Ya-Dong Yang
doaj   +1 more source

Vector meson spectral function in a dynamical AdS/QCD model

European Physical Journal C: Particles and Fields, 2022
By using gauge/gravity duality, we calculate the spectral function of the heavy vector mesons with the presence of an intense magnetic field in a hot and dense medium.
Yan-Qing Zhao, Defu Hou
doaj   +1 more source

Chiral Phase Transition in Linear Sigma Model with Nonextensive Statistical Mechanics

Advances in High Energy Physics, 2017
From the nonextensive statistical mechanics, we investigate the chiral phase transition at finite temperature T and baryon chemical potential μB in the framework of the linear sigma model.
Ke-Ming Shen, Hui Zhang, De-Fu Hou, Ben-Wei Zhang, En-Ke Wang   +4 more
doaj   +1 more source

The decomposition of neutron-antineutron oscillation operators

Journal of High Energy Physics, 2023
We study the systematic decomposition of the dimension nine neutron-antineutron oscillation operators at tree and one-loop levels. We discuss the topologies’ generation and the assignment of the chiral quarks.
Shao-Long Chen, Yu-Qi Xiao
doaj   +1 more source