Are the new particles heavy or light in \(b \rightarrow s E_{\textrm{miss}}\)?

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2025-05-20 DOI:10.1140/epjc/s10052-025-14290-y

Quan-Yi Hu

引用次数: 0

Abstract

In this work, we study the \(B^+\rightarrow K^+ E_{\textrm{miss}}\), \(B^0\rightarrow K^{*0} E_{\textrm{miss}}\), and \(\Lambda _b^0\rightarrow \Lambda ^0 E_{\textrm{miss}}\) decays under three different new physics hypotheses: the heavy new particles, the light neutral vector particles, and the axion-like particles. We find that all three hypotheses can resolve the Belle-II excess, and they can be clearly distinguished by the longitudinal polarization fraction of \(K^*\). Furthermore, we discover that the longitudinal polarization fraction of \(\Lambda \) can be used to distinguish the chirality of the effective operators.

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\(b \rightarrow s E_{\textrm{miss}}\)中的新粒子重还是轻？

在这项工作中，我们在三种不同的新物理假设下研究了\(B^+\rightarrow K^+ E_{\textrm{miss}}\), \(B^0\rightarrow K^{*0} E_{\textrm{miss}}\)和\(\Lambda _b^0\rightarrow \Lambda ^0 E_{\textrm{miss}}\)的衰变：重新粒子，轻中性矢量粒子和类轴子粒子。我们发现这三种假设都可以解决Belle-II过剩，并且它们可以通过\(K^*\)的纵向极化分数清楚地区分出来。此外，我们发现\(\Lambda \)的纵向极化分数可以用来区分有效算子的手性。

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

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.