Measurement of the B0s→μμ Effective Lifetime with the ATLAS Detector

ATLAS Collaboration

doi:10.1007/JHEP09(2023)199

Measurement of the B0s→μμ Effective Lifetime with the ATLAS Detector

ATLAS Collaboration

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

This paper reports the first ATLAS measurement of the B0s→μμ 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±13 background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the B0s effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the B0s→μμ lifetime is 0.99+0.42−0.07(stat.)±0.17 (syst.)ps and it is found to be consistent with the Standard Model.

Original language	English
Article number	199
Number of pages	32
Journal	JHEP
Volume	2023
DOIs	https://doi.org/10.1007/JHEP09(2023)199
Publication status	Published - 28 Sept 2023

Bibliographical note

32 pages in total, author list starting page 14, 4 figures. All figures/tables (including auxiliary ones), are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2020-07/

Keywords

hep-ex

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title = "Measurement of the B0s→μμ Effective Lifetime with the ATLAS Detector",

abstract = " This paper reports the first ATLAS measurement of the B0s→μμ 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±13 background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the B0s effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the B0s→μμ lifetime is 0.99+0.42−0.07(stat.)±0.17 (syst.)ps and it is found to be consistent with the Standard Model.",

keywords = "hep-ex",

author = "{ATLAS Collaboration} and Paul Newman",

note = " 32 pages in total, author list starting page 14, 4 figures. All figures/tables (including auxiliary ones), are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2020-07/",

year = "2023",

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doi = "10.1007/JHEP09(2023)199",

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TY - JOUR

T1 - Measurement of the B0s→μμ Effective Lifetime with the ATLAS Detector

AU - ATLAS Collaboration

AU - Newman, Paul

N1 - 32 pages in total, author list starting page 14, 4 figures. All figures/tables (including auxiliary ones), are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2020-07/

PY - 2023/9/28

Y1 - 2023/9/28

N2 - This paper reports the first ATLAS measurement of the B0s→μμ 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±13 background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the B0s effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the B0s→μμ lifetime is 0.99+0.42−0.07(stat.)±0.17 (syst.)ps and it is found to be consistent with the Standard Model.

AB - This paper reports the first ATLAS measurement of the B0s→μμ 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±13 background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the B0s effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the B0s→μμ lifetime is 0.99+0.42−0.07(stat.)±0.17 (syst.)ps and it is found to be consistent with the Standard Model.

KW - hep-ex

U2 - 10.1007/JHEP09(2023)199

DO - 10.1007/JHEP09(2023)199

M3 - Article

SN - 1126-6708

VL - 2023

JO - JHEP

JF - JHEP

M1 - 199

ER -

Measurement of the B0s→μμ Effective Lifetime with the ATLAS Detector

Abstract

Bibliographical note

Keywords

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