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of 76
pro vyhledávání: '"Sachrajda, Christopher T."'
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:
Bai, Ziyuan, Christ, Norman H., Karpie, Joseph M., Sachrajda, Christopher T., Soni, Amarjit, Wang, Bigeng
A lattice QCD approach to the calculation of the long-distance contributions to $\epsilon_K$ is presented. This parameter describes indirect CP violation in $K\to\pi\pi$ decay. While the short-distance contribution to $\epsilon_K$ can be accurately c
Externí odkaz:
http://arxiv.org/abs/2309.01193
Lattice QCD calculations of leptonic decay constants have now reached sub-percent precision so that isospin-breaking corrections, including QED effects, must be included to fully exploit this precision in determining fundamental quantities, in partic
Externí odkaz:
http://arxiv.org/abs/2304.08026
Autor:
Asmussen, Nils, Erben, Felix, Flynn, Jonathan, Jüttner, Andreas, Mukherjee, Rajnandini, Sachrajda, Christopher T.
Publikováno v:
PoS(LATTICE2022)069
We present our calculations for the $I$ = 1/2 and 3/2 $K-\pi$ s-wave scattering length with physical quark masses, extracted from the interaction energy of Euclidean two-point functions. We use the domain wall fermion action with physical quark masse
Externí odkaz:
http://arxiv.org/abs/2301.12858
Publikováno v:
Phys. Rev. D 103, 014507 (2021)
In Ref. [1], a method was proposed to calculate QED corrections to hadronic self energies from lattice QCD without power-law finite-volume errors. In this paper, we extend the method to processes which occur at second-order in the weak interaction an
Externí odkaz:
http://arxiv.org/abs/2009.08287
Autor:
Abbott, Ryan, Blum, Thomas, Boyle, Peter A., Bruno, Mattia, Christ, Norman H., Hoying, Daniel, Jung, Chulwoo, Kelly, Christopher, Lehner, Christoph, Mawhinney, Robert D., Murphy, David J., Sachrajda, Christopher T., Soni, Amarjit, Tomii, Masaaki, Wang, Tianle
Publikováno v:
Phys. Rev. D 102, 054509 (2020)
We present a lattice QCD calculation of the $\Delta I=1/2$, $K\to\pi\pi$ decay amplitude $A_0$ and $\varepsilon'$, the measure of direct CP-violation in $K\to\pi\pi$ decay, improving our 2015 calculation of these quantities. Both calculations were pe
Externí odkaz:
http://arxiv.org/abs/2004.09440
Publikováno v:
Phys. Rev. D 100, 114506 (2019)
The rare kaon decay $K^+\to\pi^+\nu\bar{\nu}$ is an ideal process in which to search for signs of new physics and is the primary goal of the NA62 experiment at CERN. In this paper we report on a lattice QCD calculation of the long-distance contributi
Externí odkaz:
http://arxiv.org/abs/1910.10644
Autor:
Bai, Ziyuan, Christ, Norman H., Feng, Xu, Lawson, Andrew, Portelli, Antonin, Sachrajda, Christopher T.
Publikováno v:
Phys. Rev. D 98, 074509 (2018)
In Ref [1] we have presented the results of an exploratory lattice QCD computation of the long-distance contribution to the $K^+\to\pi^+\nu\bar{\nu}$ decay amplitude. In the present paper we describe the details of this calculation, which includes th
Externí odkaz:
http://arxiv.org/abs/1806.11520
Autor:
Bai, Ziyuan, Christ, Norman H., Feng, Xu, Lawson, Andrew, Portelli, Antonin, Sachrajda, Christopher T.
Publikováno v:
Phys. Rev. Lett. 118, 252001 (2017)
We report a first, complete lattice QCD calculation of the long-distance contribution to the $K^+\to\pi^+\nu\bar{\nu}$ decay within the standard model. This is a second-order weak process involving two four-Fermi operators that is highly sensitive to
Externí odkaz:
http://arxiv.org/abs/1701.02858
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