skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A no-go theorem for non-standard explanations of the $$\tau\to K_S\pi\nu_\tau$$ CP asymmetry

Abstract

A new tensor interaction is the only possibility to explain the \boldsymbol{2.8\sigma} 2.8 𝛔 tension observed by the BaBar collaboration in the CP asymmetry in \boldsymbol{\tau\to K_S\pi\nu_\tau} 𝛕 β†’ 𝐊 𝐒 𝛑 π›Ž 𝛕 with physics beyond the Standard Model (BSM) realized above the electroweak scale. However, the strong phase generated by the interference between vector and tensor phases is suppressed by at least two orders of magnitude due to Watson’s final-state-interaction theorem, and the strength of the CP-violating tensor interaction is strongly constrained by bounds from the neutron electric dipole moment and \boldsymbol{D} 𝐃 – \boldsymbol{\bar{D}} 𝐃 β€Ύ mixing. As a result, a confirmation of the tension at Belle II would point to light BSM physics.

Authors:
 [1];  [2];  [3]
  1. Los Alamos National Laboratory
  2. Paul Scherrer Institute
  3. University of Washington
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1494965
Grant/Contract Number:  
AC52-06NA25396; FG02-00ER41132
Resource Type:
Published Article
Journal Name:
SciPost Physics Proceedings
Additional Journal Information:
Journal Name: SciPost Physics Proceedings Journal Issue: 1
Publisher:
Stichting SciPost
Country of Publication:
Country unknown/Code not available
Language:
English

Citation Formats

Cirigliano, Vincenzo, Crivellin, Andreas, and Hoferichter, Martin. A no-go theorem for non-standard explanations of the $\tau\to K_S\pi\nu_\tau$ CP asymmetry. Country unknown/Code not available: N. p., 2019. Web. doi:10.21468/SciPostPhysProc.1.007.
Cirigliano, Vincenzo, Crivellin, Andreas, & Hoferichter, Martin. A no-go theorem for non-standard explanations of the $\tau\to K_S\pi\nu_\tau$ CP asymmetry. Country unknown/Code not available. doi:10.21468/SciPostPhysProc.1.007.
Cirigliano, Vincenzo, Crivellin, Andreas, and Hoferichter, Martin. Mon . "A no-go theorem for non-standard explanations of the $\tau\to K_S\pi\nu_\tau$ CP asymmetry". Country unknown/Code not available. doi:10.21468/SciPostPhysProc.1.007.
@article{osti_1494965,
title = {A no-go theorem for non-standard explanations of the $\tau\to K_S\pi\nu_\tau$ CP asymmetry},
author = {Cirigliano, Vincenzo and Crivellin, Andreas and Hoferichter, Martin},
abstractNote = {A new tensor interaction is the only possibility to explain the \boldsymbol{2.8\sigma} 2.8 𝛔 tension observed by the BaBar collaboration in the CP asymmetry in \boldsymbol{\tau\to K_S\pi\nu_\tau} 𝛕 β†’ 𝐊 𝐒 𝛑 π›Ž 𝛕 with physics beyond the Standard Model (BSM) realized above the electroweak scale. However, the strong phase generated by the interference between vector and tensor phases is suppressed by at least two orders of magnitude due to Watson’s final-state-interaction theorem, and the strength of the CP-violating tensor interaction is strongly constrained by bounds from the neutron electric dipole moment and \boldsymbol{D} 𝐃 – \boldsymbol{\bar{D}} 𝐃 β€Ύ mixing. As a result, a confirmation of the tension at Belle II would point to light BSM physics.},
doi = {10.21468/SciPostPhysProc.1.007},
journal = {SciPost Physics Proceedings},
number = 1,
volume = ,
place = {Country unknown/Code not available},
year = {2019},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.21468/SciPostPhysProc.1.007

Save / Share: