An exploratory study of heavy-light semileptonic form factors using distillation

An exploratory study of heavy-light semileptonic form factors using distillation
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DOI:
10.22323/1.363.0169
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发表时间:
2019-12
期刊:
arXiv: High Energy Physics - Lattice
影响因子:
--
通讯作者:
P. Boyle;F. Erben;M. Marshall;F. '. h'Og'ain;A. Portelli;J. Tsang
P. Boyle;F. Erben;M. Marshall;F. '. h'Og'ain;A. Portelli;J. Tsang
中科院分区:
其他
文献类型:
--
作者:
P. Boyle;F. Erben;M. Marshall;F. '. h'Og'ain;A. Portelli;J. Tsang

文献摘要

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我们提出了我们的探索性研究的目的是模拟重轻半轻子形状因子的RBC-UKQCD魅力(底部)物理方案的一部分。我们使用蒸馏为基础的设置作为一种策略,以获得半轻子$D_{(s)}$和$B_{(s)}$衰变的最佳平台,并比较我们的结果从顺序$Z_2$-Wall传播获得的形状因子。研究是在质心系和几个运动系中进行的。我们使用了一个$N_f=2+1$畴壁费米子系综,其介子质量为340 $ MeV,目的是将研究扩展到各种其他的畴壁系综,包括物理介子质量系综。
We present our exploratory study with the aim of simulating heavy-light semileptonic form factors as part of the RBC-UKQCD charm (to bottom) physics programme. We are using a distillation-based setup as a strategy to get optimised plateaus in semileptonic $D_{(s)}$ and $B_{(s)}$ decays, and compare our results to form factors obtained from sequential $Z_2$-Wall propagators. The study is done in a centre-of-mass frame as well as in several moving frames. We use an $N_f=2+1$ domain wall fermion ensemble with a pion mass of $340$ MeV, with the aim of extending the study to a variety of other domain-wall ensembles, including physical-pion mass ensembles.