Measurement of the width difference of Bd mesons

A. S. Dighe, T. Hurth, C. S. Kim, T. Yoshikawa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We estimate ΔΓdd, including 1/ℳb contributions and part of the next-to-leading order QCD corrections, and find it to be around 0.3%. We show the methods to measure ΔΓdd by using at least two different final states on the untagged Bd decay. The nonzero width difference can also be used to identify new physics effects and to resolve a twofold discrete ambiguity in the Bd - B̄d mixing phase. With the high statistics and accurate time resolution of the upcoming LHC experiment, the measurement of ΔΓd seems to be possible. This measurement would be important for an accurate measurement of sin 2φ1 at the LHC. We also derive an upper bound on the value of ΔΓdd in the presence of new physics.

Original languageEnglish
Pages (from-to)267-269
Number of pages3
JournalNuclear Physics B - Proceedings Supplements
Volume112
DOIs
Publication statusPublished - 2002 Nov

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

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