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Semi-inclusive b→s$\bar{\ell}\ell$ transitions at high q$^2$


Isidori, Gino; Polonsky, Zachary; Tinari, Arianna (2023). Semi-inclusive b→s$\bar{\ell}\ell$ transitions at high q$^2$. Physical review D, 108(9):093008.

Abstract

We present an updated Standard Model (SM) estimate of the inclusive b→s$\bar{\ell}$ℓ rate at a high dilepton invariant mass (q$^2$≥15  GeV$^2$). We show that this estimate is in good agreement with the result obtained summing the SM predictions for the leading one-body modes (K and K$^∗$) and the subleading nonresonant Kπ channel (for which we also present an updated estimate). On the contrary, the semi-inclusive sum based on data exhibits a deficit compared to the inclusive SM prediction in the muon modes. The statistical significance of this deficit does not exceed 2σ but is free from uncertainties on hadronic form factors and fully compatible with the deficit observed at low-q$^2$ on the exclusive modes. The implications of these results in conjunction with other SM tests on b→s$\bar{μ}$μ modes are briefly discussed.

Abstract

We present an updated Standard Model (SM) estimate of the inclusive b→s$\bar{\ell}$ℓ rate at a high dilepton invariant mass (q$^2$≥15  GeV$^2$). We show that this estimate is in good agreement with the result obtained summing the SM predictions for the leading one-body modes (K and K$^∗$) and the subleading nonresonant Kπ channel (for which we also present an updated estimate). On the contrary, the semi-inclusive sum based on data exhibits a deficit compared to the inclusive SM prediction in the muon modes. The statistical significance of this deficit does not exceed 2σ but is free from uncertainties on hadronic form factors and fully compatible with the deficit observed at low-q$^2$ on the exclusive modes. The implications of these results in conjunction with other SM tests on b→s$\bar{μ}$μ modes are briefly discussed.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Nuclear and High Energy Physics
Language:English
Date:21 November 2023
Deposited On:22 Dec 2023 13:03
Last Modified:28 Jun 2024 03:31
Publisher:American Physical Society
ISSN:2470-0010
OA Status:Hybrid
Publisher DOI:https://doi.org/10.1103/physrevd.108.093008
Project Information:
  • : FunderEuropean Research Council
  • : Grant ID
  • : Project Title
  • : FunderH2020
  • : Grant ID833280
  • : Project TitleFLAY - Flavor Anomalies and the origin of the Yukawa couplings
  • Content: Published Version
  • Language: English
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)