Measurement of the $B_s^0 \to μμ$ Effective Lifetime with the ATLAS Detector

ATLAS Collaboration,

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Measurement of the $B_s^0 \to μμ$ Effective Lifetime with the ATLAS Detector

MPS-Authors

ATLAS Collaboration,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

ATLAS Collaboration (2023). Measurement of the $B_s^0 \to μμ$ Effective Lifetime with the ATLAS Detector. Journal of High Energy Physics, 09, 199. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2023-159.

Cite as: https://hdl.handle.net/21.11116/0000-000F-113C-B

Abstract

This paper reports the first ATLAS measurement of the $B_s^0 \to \mu\mu$ effective lifetime. The measurement is based on the data collected in 2015-2016, amounting to 26.3 fb$^{-1}$ of 13 TeV LHC proton-proton collisions. The proper decay-time distribution of $58\pm13$ background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the $B_s^0$ effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the $B_s^0 \to \mu\mu$ lifetime is $0.99^{+0.42}_{-0.07} \, (\text{stat.})\pm 0.17 \text{ (syst.)}\,\mathrm{ps}$ and it is found to be consistent with the Standard Model.