FCNC B and K meson decays with light bosonic Dark Matter

被引：25

作者：

He, Xiao-Gang ^{[1
,2
,3
]}

Ma, Xiao-Dong ^{[1
,2
]}

Valencia, German ^{[4
]}

机构：

[1] Shanghai Jiao Tong Univ SJTU, Tsung Dao Lee Inst TDLI, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ SJTU, Sch Phys & Astron SPA, Shanghai 200240, Peoples R China

[3] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[4] Monash Univ, Sch Phys & Astron, Wellington Rd, Clayton, Vic 3800, Australia

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

New Light Particles; Rare Decays; CHIRAL PERTURBATION-THEORY; MASS;

D O I：

10.1007/JHEP03(2023)037

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We consider decays of B and K mesons into a pseudo-scalar or vector meson plus missing energy. Within the SM, these modes originate from flavor changing neutral current (FCNC) processes with two neutrinos in the final state. In this paper we consider the experimental upper bounds on these modes and interpret the difference between these bounds and the SM prediction as a window into new light invisible particles. In particular we consider the case where some new symmetry requires the new particles to be produced in pairs. We first construct the general low energy effective Lagrangian coupling an FCNC with two dark sector particles of spin zero, one-half and one. We then present numerical estimates for the constraints that can be placed on these interactions, finding that an effective new physics scale from O(10) -O(10(11)) GeV can be probed, with the exact value strongly depending on the interaction structure as well as the mass of the invisible particle. For K+->pi(+) E/ we incorporate into our constraints the effect of using only the signal regions of NA62, and for B+ -> K+ E/ the q(2)-dependent efficiency of Belle II.

引用

页数：39

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