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Precision Measurement of the Ratio B (Υ (3S) →τ+τ-) / B (Υ (3S) →μ+μ-)

Lees J. P.
•
Poireau V.
•
Tisserand V.
altro
Wu S. L.
2020
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We report on a precision measurement of the ratio RτμΥ(3S)=B(Υ(3S)→τ+τ-)/B(Υ(3S)→μ+μ-) using data collected with the BABAR detector at the SLAC PEP-II e+e- collider. The measurement is based on a 28 fb-1 data sample collected at a center-of-mass energy of 10.355 GeV corresponding to a sample of 122 million Υ(3S) mesons. The ratio is measured to be RτμΥ(3S)=0.966±0.008stat±0.014syst and is in agreement with the standard model prediction of 0.9948 within 2 standard deviations. The uncertainty in RτμΥ(3S) is almost an order of magnitude smaller than the only previous measurement.
DOI
10.1103/PhysRevLett.125.241801
WOS
WOS:000596461100005
Archivio
http://hdl.handle.net/11368/2994559
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85097586300
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.241801
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/2994559/1/PhysRevLett.125.241801.pdf
Soggetti
  • BaBar

  • PEP-II

  • Upsilon meson

Scopus© citazioni
4
Data di acquisizione
Jun 7, 2022
Vedi dettagli
Web of Science© citazioni
4
Data di acquisizione
Mar 28, 2024
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