Zobrazeno 1 - 10
of 5 298
pro vyhledávání: '"Lattice calculation"'
Autor:
Kellermann, Ryan, Barone, Alessandro, Elgaziari, Ahmed, Hashimoto, Shoji, Hu, Zhi, Jüttner, Andreas, Kaneko, Takashi
We report on the calculation of the inclusive semileptonic decay of the $D_s$ meson on the lattice. We simulate the $D_s \rightarrow X_s\ell\nu_\ell$ process with M\"obius domain-wall charm and strange quarks, whose masses are approximately tuned to
Externí odkaz:
http://arxiv.org/abs/2411.18058
We calculate the s-wave scattering length in the $0^+$ sector of $\eta_c\eta_c$ and the $2^+$ sector of $J/\psi J/\psi$ using three $N_f=2$ twisted mass gauge ensembles with the lattice spacing $a=0.0667,0.085,0.098$ fm, respectively. The scattering
Externí odkaz:
http://arxiv.org/abs/2411.11533
Recently, it has been proposed to compute parton distributions from boosted correlators fixed in the Coulomb gauge within the framework of Large-Momentum Effective Theory. This method does not involve Wilson lines and could greatly improve the effici
Externí odkaz:
http://arxiv.org/abs/2408.05910
We describe a first-principles method to apply lattice QCD to compute the order $\alpha_{\mathrm{EM}}$ corrections to $K\to\pi\ell\nu_\ell$ decay. This method formulates the calculation in infinite volume with the conventional infinite-volume, contin
Externí odkaz:
http://arxiv.org/abs/2402.08915
Autor:
Lattice Parton Collaboration, Chu, Min-Huan, He, Jin-Chen, Hua, Jun, Liang, Jian, Ji, Xiangdong, Schäfer, Andreas, Shu, Hai-Tao, Su, Yushan, Walter, Lisa, Wang, Wei, Wang, Ji-Hao, Yang, Yi-Bo, Zeng, Jun, Zhang, Qi-An
Publikováno v:
JHEP08(2023)172
We calculate the soft function using lattice QCD in the framework of large momentum effective theory incorporating the one-loop perturbative contributions. The soft function is a crucial ingredient in the lattice determination of light cone objects u
Externí odkaz:
http://arxiv.org/abs/2306.06488
Autor:
Frezzotti, R., Gagliardi, G., Lubicz, V., Martinelli, G., Mazzetti, F., Sachrajda, C. T., Sanfilippo, F., Simula, S., Tantalo, N.
We compute the structure-dependent axial and vector form factors for the radiative leptonic decays $D_s\to \ell\nu_\ell\gamma$, where $\ell$ is a charged lepton, as functions of the energy of the photon in the rest frame of the $D_s$ meson. The compu
Externí odkaz:
http://arxiv.org/abs/2306.05904
Autor:
Gérardin, Antoine, Verplanke, Willem E. A., Wang, Gen, Fodor, Zoltan, Guenther, Jana N., Lellouch, Laurent, Szabo, Kalman K., Varnhorst, Lukas
In this paper we present a first ab-initio calculation of the $\pi^0$, $\eta$ and $\eta^{\prime}$ transition form factors performed with physical light-quark masses. We provide a complete parametrization of the form factors that includes both single
Externí odkaz:
http://arxiv.org/abs/2305.04570
Publikováno v:
Nucl.Phys.B 993 (2023)
We present a new Bjorken $x$-dependence analysis of a previous lattice quantum chromodynamics data for the pion distribution amplitude from MILC configurations with three lattice spacing $a=0.06,0.09, 0.12$~fm. A leading renormalon resummation in ren
Externí odkaz:
http://arxiv.org/abs/2301.10372
Autor:
Evangelista, Antonio, Frezzotti, Roberto, Gagliardi, Giuseppe, Lubicz, Vittorio, Sanfilippo, Francesco, Simula, Silvano, Tantalo, Nazario
The inclusive hadronic decay-rates of the $\tau$ lepton are particularly interesting from the phenomenological point of view since they give access to the CKM matrix elements $V_{ud}$ and $V_{us}$. In this talk, we discuss how a recent method for the
Externí odkaz:
http://arxiv.org/abs/2301.00796
Autor:
Alexandrou, Constantia, Bacchio, Simone, De Santis, Alessandro, Dimopoulos, Petros, Finkenrath, Jacob, Frezzotti, Roberto, Gagliardi, Giuseppe, Garofalo, Marco, Hadjiyiannakou, Kyriakos, Kostrzewa, Bartosz, Jansen, Karl, Lubicz, Vittorio, Petschlies, Marcus, Sanfilippo, Francesco, Simula, Silvano, Tantalo, Nazario, Urbach, Carsten, Wenger, Urs
The ratio $R(E)$ of the cross-sections for $e^+e^-\to$ hadrons and $e^+e^-\to \mu^+\mu^-$ is a valuable energy-dependent probe of the hadronic sector of the Standard Model. Moreover, the experimental measurements of $R(E)$ are the inputs of the dispe
Externí odkaz:
http://arxiv.org/abs/2212.12493