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Baryonic form factors induced by tensor currents in light-front approach

Hang Liu, Wei Wang, and Zhi-Peng Xing
Phys. Rev. D 108, 035008 – Published 3 August 2023
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Abstract
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  • INTRODUCTION
  • THEORETICAL FRAMEWORK
  • FORM FACTORS
  • NUMERICAL ANALYSIS
  • SUMMARY
  • ACKNOWLEDGMENTS
  • APPENDICES
    • References

    Abstract

    Inspired by the recent anomalies on the lepton flavor universalities, we present an investigation of baryonic form factors induced by heavy-to-light tensor currents. With the light-front quark model, we calculate the tensor form factors, and the momentum distributions are accessed with two parametrization forms. Numerical results for the form factors at q2=0 are derived and parameters in q2 distributions are obtained through extrapolation. Our results are helpful for the analysis of new physics contributions in the heavy-to-light transition.

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    • Received 6 May 2023
    • Accepted 10 July 2023

    DOI:https://doi.org/10.1103/PhysRevD.108.035008

    Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

    Published by the American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    Extensions of fermion sector
    1. Properties
    Form factors
    Particles & Fields

    Authors & Affiliations

    Hang Liu1, Wei Wang1,2,*, and Zhi-Peng Xing3,4,†

    • 1INPAC, Key Laboratory for Particle Astrophysics and Cosmology (MOE), Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
    • 2Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences, Huizhou 516000, Guangdong Province, China
    • 3Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
    • 4Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, Jiangsu 210023, China

    • *wei.wang@sjtu.edu.cn
    • †Corresponding author: zpxing@sjtu.edu.cn

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    Issue

    Vol. 108, Iss. 3 — 1 August 2023

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    • Figure 1
      Figure 1

      The q2 dependence form factors of Λb→Λc process with BCL model (blue line) and pole model (orange line).

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    • Figure 2
      Figure 2

      The q2-dependent form factors of Σb+→Σc++ process with BCL model (bule line) and pole model (orange line).

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    • Figure 3
      Figure 3

      The constraint on CVLτ and CTτ from the Rexp(Λc)=0.242±0.026±0.040±0.059 (red) and B→D*ℓν data in LHC (blue).

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