Zobrazeno 1 - 10
of 352
pro vyhledávání: '"Chao Qiang Geng"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 3, Pp 1-13 (2024)
Abstract Motivated by the long-standing discrepancy between the Standard Model prediction and the experimental measurement of the muon magnetic dipole moment, we have recently proposed to interpret this muon $$g-2$$ g - 2 anomaly in terms of the loop
Externí odkaz:
https://doaj.org/article/77612e750ffb4ceda1bdcaa3de8e3786
Publikováno v:
Physics Letters B, Vol 852, Iss , Pp 138637- (2024)
In light of the recently discovered W-boson mass anomaly by the CDF Collaboration, we discuss two distinct mechanisms that could possibly explain this anomaly through the introduction of high-dimensional SU(2)L scalar multiplets. The first mechanism
Externí odkaz:
https://doaj.org/article/bedf52a9f8824437889c2acd8327a7ca
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 10, Pp 1-7 (2023)
Abstract We study the isospin violating decays of vector charmonia to $$\Lambda \overline{\Sigma }^0$$ Λ Σ ¯ 0 and its charge conjugate. They are dominated by the single photon annihilation and can be evaluated reliably with timelike form factors.
Externí odkaz:
https://doaj.org/article/7e63eca89a17473b9ac45bd56953943d
Publikováno v:
Physics Letters B, Vol 850, Iss , Pp 138497- (2024)
We investigate the cosmological perturbations around all three branches of spatially flat universe with different connections in symmetric teleparallel gravity. The model we consider can cover both the case of f(Q) model and that of the non-minimal c
Externí odkaz:
https://doaj.org/article/39a50bb608784850a2fe6ff5fb4ac1fb
Publikováno v:
Physics Letters B, Vol 846, Iss , Pp 138240- (2023)
We study the CP-odd and CP-even observables of the B mesons decaying into a baryon and antibaryon. We estimate these observables through the P03 model and chiral selection rule. The decay branching ratio of B+→pΛ‾ is calculated to be (2.31±0.69
Externí odkaz:
https://doaj.org/article/974d1f8e3edf425ab65ee6ec27292059
Publikováno v:
Physics Letters B, Vol 839, Iss , Pp 137831- (2023)
We study the Ξc−Ξc′ mixing effects in the semileptonic decays the doubly charm baryons of Ξcc. We focus on the ratio of R(θc)≡B(Ξcc→Ξc′e+νe)/B(Ξcc→Ξce+νe) and find that (R(θ0),R(−θ0))=(0.46±0.01,7.33±0.23) with θ0=0.137π
Externí odkaz:
https://doaj.org/article/4205efa250544c9b824ee4767ce394cb
Autor:
Chao-Qiang Geng, Geng Li
Publikováno v:
Physics Letters B, Vol 839, Iss , Pp 137811- (2023)
We study the invisible scalar of S in charmed meson and baryon decays with flavor-changing neutral currents (FCNCs) based on the model-independent effective Lagrangian between the quarks and invisible scalar. From the bounds of the coupling constants
Externí odkaz:
https://doaj.org/article/73c768e0bf2a4d30969bb83233e121cf
Autor:
Chia-Wei Liu, Chao-Qiang Geng
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 1, Pp 1-15 (2022)
Abstract We study time-reversal (T) asymmetries in the charmless two-body decays of antitriplet bottom baryons. We find that in B b → B n P with B b = ( Ξ b − $$ {\Xi}_b^{-} $$ , Ξ b 0 $$ {\Xi}_b^0 $$ , Λ b ) and B n (P) a octet baryon (pseudo
Externí odkaz:
https://doaj.org/article/6ca2ed4968a348b784a267a29d8bb7ee
Publikováno v:
Physics Letters B, Vol 838, Iss , Pp 137736- (2023)
We study the ratio of R=2Γ(Ξc0→Ξ−e+νe)/3Γ(Λc+→Λe+νe), which is found to be R=1(0.8) from the exact (broken) SU(3) flavor symmetry, in sharp contrast to the average value of Rav=0.59±0.10 from the ALICE collaboration and lattice QCD res
Externí odkaz:
https://doaj.org/article/35071d0e212c464da8808276893bda65
Autor:
Chao-Qiang Geng, Chia-Wei Liu
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 11, Pp 1-22 (2021)
Abstract We study the spin correlations to probe time-reversal (T) asymmetries in the decays of Λ b → ΛV (V = ϕ, ρ 0, ω, K ∗0). The eigenstates of the T-odd operators are obtained along with definite angular momenta. We obtain the T-odd spin
Externí odkaz:
https://doaj.org/article/6c0385391b5e4a86b919c77a331247eb