Deciphering the Belle II data on B→Kνν decay in the (dark) SMEFT with minimal flavour violation

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成果类型：

期刊论文

作者：

Hou, Biao-Feng;Li, Xin-Qiang;Shen, Meng;Yang, Ya-Dong;Yuan, Xing-Bo

通讯作者：

Hou, BF

作者机构：

[Hou, BF; Hou, Biao-Feng; Yang, Ya-Dong; Yuan, Xing-Bo; Li, Xin-Qiang; Shen, Meng] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.

[Hou, BF; Hou, Biao-Feng; Yang, Ya-Dong; Yuan, Xing-Bo; Li, Xin-Qiang; Shen, Meng] Cent China Normal Univ, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Hubei, Peoples R China.

[Li, Xin-Qiang] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China.

[Yang, Ya-Dong] Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Peoples R China.

通讯机构：

[Hou, BF ] C

Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.

Cent China Normal Univ, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Hubei, Peoples R China.

语种：

英文

关键词：

New Light Particles;Semi-Leptonic Decays;Flavour Symmetries;SMEFT

期刊：

Journal of High Energy Physics

ISSN：

1029-8479

年：

2024

卷：

2024

期：

页码：

1-48

DOI：

10.1007/JHEP06(2024)172

基金类别：

National Natural Science Foundation of China [12135006, 12075097, 11805077]; Fundamental Research Funds for the Central Universities [CCNU22LJ004]; Startup Research Funding from CCNU

机构署名：

本校为第一且通讯机构

院系归属：

物理科学与技术学院

摘要：

Recently, the Belle II collaboration announced the first measurement of the branching ratio $$ \mathcal{B}\left({B}^{+}\to {K}^{+}\nu \overline{\nu}\right) $$ , which is found to be about 2.7σ higher than the Standard Model (SM) prediction. We decipher the data with two new physics scenarios: the underlying quark-level $$ b\to s\nu \overline{\nu} $$ transition is, besides the SM contribution, further affected by heavy new mediators that are much heavier than the electroweak scale, or amended by an additional decay channel...

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Deciphering the Belle II data on B→Kνν decay in the (dark) SMEFT with minimal flavour violation

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