Zobrazeno 1 - 10
of 405
pro vyhledávání: '"Sang, Wen"'
We compute the fragmentation function of a light quark into S-wave fully-charmed tetraquarks ($T_{4c}$) within the nonrelativistic QCD (NRQCD) framework, at leading order in $\alpha_{s}$ and $v$. We present results for light quark fragmentation into
Externí odkaz:
http://arxiv.org/abs/2411.19296
Inspired by the recent observation of the Higgs boson radiative decay into $Z^0$ by {\tt ATLAS} and {\tt CMS} Collaborations, we investigate the next-to-leading-order (NLO) electroweak correction to this rare decay process in Standard Model (SM). Imp
Externí odkaz:
http://arxiv.org/abs/2405.03464
Publikováno v:
JHEP09(2024)002
Within the framework of nonrelativistic QCD (NRQCD), we calculate the fragmentation function for a charm quark into an $S$-wave fully-charmed tetraquark, denoted as $T_{4c}$. The charm-to-$T_{4c}$ fragmentation function is expressed as a sum of produ
Externí odkaz:
http://arxiv.org/abs/2404.13889
Publikováno v:
Phys. Rev. D 110, 054007 (2024)
In this work, we investigate the inclusive photoproduction of the $C$-odd, $S$-wave fully charmed tetraquark at electron-ion colliders within the nonrelativistic QCD (NRQCD) factorization framework, at the lowest order in velocity and $\alpha_s$. The
Externí odkaz:
http://arxiv.org/abs/2311.08292
In the framework of nonrelativistic QCD (NRQCD) factorization, we compute both the polarized and the unpolarized decay widths for the processes $\eta_b(\chi_{bJ})\to J/\psi J/\psi$, accurate up to next-to-next-to-leading-order (NNLO) in $\alpha_s$. F
Externí odkaz:
http://arxiv.org/abs/2310.07453
In this study, we compute the electromagnetic and hadronic decay widths of the S-wave fully heavy tetraquark $T_{4Q}$ ($Q=c$ or $b$) at lowest order in $\alpha_s$ and $v$, in the framework of nonrelativistic QCD. The short-distance coefficients are d
Externí odkaz:
http://arxiv.org/abs/2307.16150
Optimized ${\cal O}(\alpha_s^2)$ correction to exclusive double $J/\psi$ production at $B$ factories
The failure of observing the $e^+ e^- \to J/\psi+J/\psi$ events at $B$ factories to date is often attributed to the significant negative order-$\alpha_s$ correction. In this work we compute the ${\cal O}(\alpha^2_s)$ correction to this process for th
Externí odkaz:
http://arxiv.org/abs/2306.11538
The $X(6900)$ resonance, originally discovered by the \texttt{LHCb} collaboration and later confirmed by both \texttt{ATLAS} and \texttt{CMS} experiments, has sparked broad interests in the fully-charmed tetraquark states. Relative to the mass spectr
Externí odkaz:
http://arxiv.org/abs/2304.11142
Within the framework of nonrelativistic QCD (NRQCD) factorization formalism, we compute QCD next-to-next-to-leading order (NNLO) corrections to the helicity amplitudes as well as the decay width of $Z\to H+\gamma$, where $H$ can be $\eta_Q (Q=c,b), J
Externí odkaz:
http://arxiv.org/abs/2302.06439
Publikováno v:
Phys.Lett.B 839 (2023) 137812
In this paper, we evaluate, up to QCD next-to-next-to-next-to-leading order, the $B_c^*$ decay constant, which, within the nonrelativistic QCD (NRQCD) framework, is factorized as the product of the short-distance coefficient (SDC) and the long-distan
Externí odkaz:
http://arxiv.org/abs/2210.02979