Zobrazeno 1 - 10
of 223
pro vyhledávání: '"Hsiang Nan Li"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 8, Pp 1-26 (2022)
Abstract We reanalyze the $$\Lambda _b\rightarrow p$$ Λ b → p transition form factors in the perturbative QCD (PQCD) approach by including higher-twist light-cone distribution amplitudes (LCDAs) of a $$\Lambda _b$$ Λ b baryon and a proton. The pr
Externí odkaz:
https://doaj.org/article/058b7871cbe24e13900a7a10574921bb
Autor:
Zhi-Qing Zhang, Hsiang-nan Li
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 7, Pp 1-7 (2021)
Abstract We extend the threshold resummation of the large logarithms $$\ln x$$ ln x which appear in factorization formulas for exclusive B meson decays, x being a spectator momentum fraction, to the next-to-leading-logarithm (NLL) accuracy. It is sho
Externí odkaz:
https://doaj.org/article/abdecdca3b9048e99b173f9cdcc5c733
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 5, Pp 1-52 (2021)
Abstract We investigate the four-body decays B (s) → (Kπ) S/P (Kπ) S/P in the Kπ-pair invariant mass region around the K *(892) resonance in the perturbative QCD (PQCD) approach, where (Kπ) S/P denotes a S- or P-wave Kπ configuration. The cont
Externí odkaz:
https://doaj.org/article/82b50d620ef84f87b899e27c99f0155a
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 1, Pp 1-19 (2019)
Abstract It was proposed recently that different chiralities of the dark matter (DM) fermion under a broken dark U(1) gauge group can lead to distinguishable signatures at the LHC through shower patterns, which may reveal the mass origin of the dark
Externí odkaz:
https://doaj.org/article/063fdf1032274a5eaf6f78db7d4fd9e1
Publikováno v:
Physics Letters B, Vol 811, Iss , Pp 135892- (2020)
We derive the kT resummation for a transverse-momentum-dependent charmonium wave function, which involves the bottom quark mass mb, the charm quark mass mc, and the charm quark transverse momentum kT, up to the next-to-leading-logarithm (NLL) accurac
Externí odkaz:
https://doaj.org/article/99912986c3c845e7b958980ce74a8c95
Publikováno v:
Physics Letters B, Vol 810, Iss , Pp 135802- (2020)
We calculate the parameters x and y for the D meson mixing in the Standard Model by considering a dispersion relation between them. The dispersion relation for a fictitious charm quark of arbitrary mass squared s is turned into an inverse problem, vi
Externí odkaz:
https://doaj.org/article/ff105975e5e24f49b60c54630b3da91a
Publikováno v:
Physics Letters B, Vol 771, Iss , Pp 619-623 (2017)
We present a perturbative QCD factorization formula for substructures of an energetic Higgs jet, taking the energy profile resulting from the H→bb¯ decay as an example. The formula is written as a convolution of a hard Higgs decay kernel with two
Externí odkaz:
https://doaj.org/article/977386abf2594ef5a69df9e20d784069
Autor:
Wen-Fei Wang, Hsiang-nan Li
Publikováno v:
Physics Letters B, Vol 763, Iss , Pp 29-39 (2016)
We analyze the quasi-two-body decays B→Kρ→Kππ in the perturbative QCD (PQCD) approach, in which final-state interactions between the pions in the resonant regions associated with the P-wave states ρ(770) and ρ′(1450) are factorized into tw
Externí odkaz:
https://doaj.org/article/56644630a31446468b12564a48126565
Autor:
Hsiang-nan Li
Publikováno v:
Physical Review
We analyze the neutral meson mixing by directly solving the dispersion relation obeyed by the mass and width differences of the two meson mass eigenstates. We solve for the parameters $x$ and $y$, proportional to the mass and width differences in the
Autor:
Hsiang-nan Li
Publikováno v:
Physical Review
We demonstrate that fermion masses in the Standard Model (SM) can be constrained by the dispersion relations obeyed by hadronic and semileptonic decay widths of a fictitious heavy quark $Q$ with an arbitrary mass. These relations, imposing stringent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82bd472251b6a44afbfa23add1650599
http://arxiv.org/abs/2302.01761
http://arxiv.org/abs/2302.01761