Header

UZH-Logo

Maintenance Infos

Hunting for B+ → K+τ+τ− imprints on the B+ → K+μ+μ−dimuon spectrum


Cornella, C; Isidori, Gino; König, Matthias A; Liechti, S; Owen, P; Serra, N (2020). Hunting for B+ → K+τ+τ− imprints on the B+ → K+μ+μ−dimuon spectrum. European Physical Journal C - Particles and Fields, 80(12):1095.

Abstract

We investigate the possibility of indirectly constraining the B+→K+τ+τ− decay rate using precise data on the B+→K+μ+μ− dimuon spectrum. To this end, we estimate the distortion of the spectrum induced by the B+→K+τ+τ−→K+μ+μ− re-scattering process, and propose a method to simultaneously constrain this (non-standard) contribution and the long-distance effects associated to hadronic intermediate states. The latter are constrained using the analytic properties of the amplitude combined with data and perturbative calculations. Finally, we estimate the sensitivity expected at the LHCb experiment with present and future datasets. We find that constraints on the branching fraction of O(10−3), competitive with current direct bounds, can be achieved with the current dataset, while bounds of O(10−4) could be obtained with the LHCb upgrade-II luminosity.

Abstract

We investigate the possibility of indirectly constraining the B+→K+τ+τ− decay rate using precise data on the B+→K+μ+μ− dimuon spectrum. To this end, we estimate the distortion of the spectrum induced by the B+→K+τ+τ−→K+μ+μ− re-scattering process, and propose a method to simultaneously constrain this (non-standard) contribution and the long-distance effects associated to hadronic intermediate states. The latter are constrained using the analytic properties of the amplitude combined with data and perturbative calculations. Finally, we estimate the sensitivity expected at the LHCb experiment with present and future datasets. We find that constraints on the branching fraction of O(10−3), competitive with current direct bounds, can be achieved with the current dataset, while bounds of O(10−4) could be obtained with the LHCb upgrade-II luminosity.

Statistics

Citations

Dimensions.ai Metrics

Altmetrics

Downloads

4 downloads since deposited on 03 Dec 2020
4 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Uncontrolled Keywords:Physics and Astronomy (miscellaneous), Engineering (miscellaneous)
Language:English
Date:1 December 2020
Deposited On:03 Dec 2020 15:45
Last Modified:03 Dec 2020 15:45
Publisher:Springer
ISSN:1434-6044
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1140/epjc/s10052-020-08674-5

Download

Gold Open Access

Download PDF  'Hunting for B+ → K+τ+τ− imprints on the B+ → K+μ+μ−dimuon spectrum'.
Preview
Content: Published Version
Filetype: PDF
Size: 484kB
View at publisher
Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)