On the Scalar-Sensitive Angular Observables for B → Kll in the SM

• Published in: Physics of particles and nuclei letters Vol. 17; no. 1; pp. 1 - 12
• Main Authors: Bednyakov, A. V., Mukhaeva, A. I.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2020; Springer Nature B.V
• Subjects: Particle and Nuclear Physics; Physics; Physics and Astronomy; Physics of Elementary Particles and Atomic Nuclei. Theory
• ISSN: 1547-4771; 1531-8567
• DOI: 10.1134/S1547477120010045

The angular analysis of rare decays
deserves much attention in literature due to rich structure and great potential to discover New Physics. There are several 2–3
discrepancies with the SM predictions, which can be accounted for by the introduction of New Physics. In this paper we will not address these issues, but concentrate on the SM predictions. The aim of the present letter is to consider scalar-sensitive observables and review the SM result for the latter. It is a well-known fact that the corresponding contributions are heavily suppressed in the SM and usually neglected. Nevertheless, we present the explicit result for the leading contribution, which can be of interest when comparing with possible NP predictions. In addition, we briefly discuss possible prospects of experimental study of the corresponding observables.