Radiative B to tensor meson decays at NLO in SCET

IF 3.4 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

Journal of Physics G: Nuclear and Particle Physics Pub Date : 2023-07-28 DOI:10.1088/1361-6471/aceb7c

Arslan Sikandar, M. Aslam

引用次数: 0

Abstract

The radiative $B$ to tensor $\left(K_2^*(1430),\; f_2(1270),\; a_2(1320)\right)$ meson decays are studied at next-to-leading order (NLO) in soft-collinear effective theory (SCET). The SCET allows the systematic treatment of factorizable and non-factorizable contributions along with the resummation of large perturbative logarithms. We performed a two step matching and determined the soft-overlap function $\zeta^\perp_{T}$ and branching ratios for these $B$ to tensor meson decays. In the case of $B\to K_2^*(1430)\gamma$, the numerical value of the branching ratio lies close to its experimental measurements. The estimated values of the branching ratios of CKM suppressed decays $B \to \left(a_2(1320),\; f_2(1270)\right)\gamma$ are significant small compared to that of $B\to K_2^*(1430)\gamma$, but still could be measured in some ongoing and future $B$ physics experiments.

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辐射B到张量介子在SCET的NLO衰变

张量$left的辐射$B$（K_2^*（1430），\；f2（1270），\；a_2（1320）\right）$介子衰变的软共线有效理论研究。SCET允许系统处理可因子分解和不可因子分解的贡献，以及大扰动对数的恢复。我们进行了两步匹配，并确定了软重叠函数$\zeta^\perp_{T}$以及这些$B$与张量介子衰变的分支比。在$B\~K_2^*（1430）\gamma$的情况下，分支比的数值接近其实验测量值。CKM抑制衰变的分支比的估计值$B\to\left（a_2（1320），\；f_2（1270）\right）\gamma$与$B\到K_2^*（1430）\gamma$相比显著较小，但仍可以在一些正在进行和未来的$B$物理实验中测量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Physics G: Nuclear and Particle Physics 物理-物理：核物理

CiteScore

7.60

自引率

5.70%

发文量

105

审稿时长

1 months

期刊介绍： Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields. All aspects of fundamental nuclear physics research, including: nuclear forces and few-body systems; nuclear structure and nuclear reactions; rare decays and fundamental symmetries; hadronic physics, lattice QCD; heavy-ion physics; hot and dense matter, QCD phase diagram. All aspects of elementary particle physics research, including: high-energy particle physics; neutrino physics; phenomenology and theory; beyond standard model physics; electroweak interactions; fundamental symmetries. All aspects of nuclear and particle astrophysics including: nuclear physics of stars and stellar explosions; nucleosynthesis; nuclear equation of state; astrophysical neutrino physics; cosmic rays; dark matter. JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.