New Probes of Electron-Muon Universality in B → Kℓ
            +ℓ
            − Decays

Robert Fleischer; Eleftheria Malami; Anders Rehult; K. Keri Vos

New Probes of Electron-Muon Universality in B → Kℓ ⁺ℓ ⁻ Decays

Robert Fleischer, Eleftheria Malami, Anders Rehult, K. Keri Vos

Research output: Contribution to journal › Conference article in journal › Academic › peer-review

Abstract

In the pursuit of physics beyond the Standard Model, a promising path is the study of B-meson decays caused by the transition b → sℓ ⁺ℓ ⁻. A key observable in such decays is the ratio R _K, which measures electron-muon universality in (Formula Presented). At first sight, the recent LHCb measurement of R _K ∼ 1 may seem to largely constrain deviations from universality in these decays. However, we show that this is actually not the case: new sources of CP violation allow for significant universality violation consistent with R _K ∼ 1. This provides an exciting new opportunity to search for New Physics by measuring differences between CP asymmetries in (Formula Presented).

Original language	English
Article number	057
Journal	P o S - Proceedings of Science
Volume	443
Publication status	Published - 7 Nov 2024
Event	20th International Conference on B-Physics at Frontier Machines, BEAUTY 2023 - Clermont-Ferrand, France Duration: 3 Jul 2023 → 7 Jul 2023 Conference number: 20th https://pos.sissa.it/443/

Cite this

@article{be50ab3f40fa478ebb8d7766cf31869e,

title = "New Probes of Electron-Muon Universality in B → Kℓ +ℓ − Decays",

abstract = "In the pursuit of physics beyond the Standard Model, a promising path is the study of B-meson decays caused by the transition b → sℓ +ℓ −. A key observable in such decays is the ratio R K, which measures electron-muon universality in (Formula Presented). At first sight, the recent LHCb measurement of R K ∼ 1 may seem to largely constrain deviations from universality in these decays. However, we show that this is actually not the case: new sources of CP violation allow for significant universality violation consistent with R K ∼ 1. This provides an exciting new opportunity to search for New Physics by measuring differences between CP asymmetries in (Formula Presented).",

author = "Robert Fleischer and Eleftheria Malami and Anders Rehult and Vos, \{K. Keri\}",

note = "Funding Information: A.R. would like to thank the organizers for the invitation to the enjoyable conference. This research has been supported by the Netherlands Organisation for Scientific Research (NWO). Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons.; 20th International Conference on B-Physics at Frontier Machines, BEAUTY 2023, BEAUTY2023 ; Conference date: 03-07-2023 Through 07-07-2023",

year = "2024",

month = nov,

day = "7",

language = "English",

volume = "443",

journal = "P o S - Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab",

url = "https://pos.sissa.it/443/",

}

TY - JOUR

T1 - New Probes of Electron-Muon Universality in B → Kℓ +ℓ − Decays

AU - Fleischer, Robert

AU - Malami, Eleftheria

AU - Rehult, Anders

AU - Vos, K. Keri

N1 - Conference code: 20th

PY - 2024/11/7

Y1 - 2024/11/7

N2 - In the pursuit of physics beyond the Standard Model, a promising path is the study of B-meson decays caused by the transition b → sℓ +ℓ −. A key observable in such decays is the ratio R K, which measures electron-muon universality in (Formula Presented). At first sight, the recent LHCb measurement of R K ∼ 1 may seem to largely constrain deviations from universality in these decays. However, we show that this is actually not the case: new sources of CP violation allow for significant universality violation consistent with R K ∼ 1. This provides an exciting new opportunity to search for New Physics by measuring differences between CP asymmetries in (Formula Presented).

AB - In the pursuit of physics beyond the Standard Model, a promising path is the study of B-meson decays caused by the transition b → sℓ +ℓ −. A key observable in such decays is the ratio R K, which measures electron-muon universality in (Formula Presented). At first sight, the recent LHCb measurement of R K ∼ 1 may seem to largely constrain deviations from universality in these decays. However, we show that this is actually not the case: new sources of CP violation allow for significant universality violation consistent with R K ∼ 1. This provides an exciting new opportunity to search for New Physics by measuring differences between CP asymmetries in (Formula Presented).

M3 - Conference article in journal

SN - 1824-8039

VL - 443

JO - P o S - Proceedings of Science

JF - P o S - Proceedings of Science

M1 - 057

T2 - 20th International Conference on B-Physics at Frontier Machines, BEAUTY 2023

Y2 - 3 July 2023 through 7 July 2023

ER -

New Probes of Electron-Muon Universality in B → Kℓ +ℓ − Decays

Abstract

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New Probes of Electron-Muon Universality in B → Kℓ ⁺ℓ ⁻ Decays