Right-handed interactions in puzzling B-decays

Bečirević, Damir (author), Fajfer, Svjetlana (author), Košnik, Nejc (author), Pavičić, Lovre (author)

We explain the difference between the measured decay widths of $b \to c \tau \nu$ processes and of $B \to K \nu \bar{\nu}$ and their values predicted in the Standard Model by introducing the right-handed interactions both to quarks and to leptons. At low energy scales, in addition to the Standard Model particles, we assume the presence of an additional neutral lepton (right-handed neutrino). We then show a specific realization of such a scenario in a model with a single scalar leptoquark ($S_1$), and discuss the corresponding phenomenology.

• Language: English
• Keywords: physics of elementary particles, particle decays
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: 7 str.
• Numbering: Vol. 861, art. 139285
• PID: 20.500.12556/RUL-166883
• UDC: 539.1
• ISSN on article: 1873-2445
• DOI: 10.1016/j.physletb.2025.139285
• COBISS.SI-ID: 224410883
• Publication date in RUL: 29.01.2025

Record is a part of a journal

• Title: Physics letters
• Shortened title: Phys. lett., B
• Publisher: Elsevier Science
• ISSN: 1873-2445
• COBISS.SI-ID: 524694809

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: fizika osnovnih delcev, razpadi delcev