Measurement of the width difference of Bd mesons

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

doi:10.1016/s0920-5632(02)01717-6

Measurement of the width difference of B_d mesons

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

Department of Physics

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

1 Citation (Scopus)

Abstract

We estimate ΔΓ_d/Γ_d, including 1/ℳ_b 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 ΔΓ_d/Γ_d by using at least two different final states on the untagged B_d decay. The nonzero width difference can also be used to identify new physics effects and to resolve a twofold discrete ambiguity in the B_d - B̄_d mixing phase. With the high statistics and accurate time resolution of the upcoming LHC experiment, the measurement of ΔΓ_d 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 ΔΓ_d/Γ_d in the presence of new physics.

Original language	English
Pages (from-to)	267-269
Number of pages	3
Journal	Nuclear Physics B - Proceedings Supplements
Volume	112
DOIs	https://doi.org/10.1016/s0920-5632(02)01717-6
Publication status	Published - 2002 Nov

Bibliographical note

Funding Information:
The work of C.S.K. was supported by Grant No. 2001-042-DO0022 of the KRF. The work of T.Y. was supported in part by the US Department of Energy under Grant No.DE-FG02-97ER-41036.

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/s0920-5632(02)01717-6

Cite this

@article{c33d4218d2734f80817f0b4659074a61,

title = "Measurement of the width difference of Bd mesons",

abstract = "We estimate ΔΓd/Γd, 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 ΔΓd/Γd 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 - {\=B}d 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 ΔΓd/Γd in the presence of new physics.",

author = "Dighe, {A. S.} and T. Hurth and Kim, {C. S.} and T. Yoshikawa",

note = "Funding Information: The work of C.S.K. was supported by Grant No. 2001-042-DO0022 of the KRF. The work of T.Y. was supported in part by the US Department of Energy under Grant No.DE-FG02-97ER-41036.",

year = "2002",

month = nov,

doi = "10.1016/s0920-5632(02)01717-6",

language = "English",

volume = "112",

pages = "267--269",

journal = "Nuclear Physics B - Proceedings Supplements",

issn = "0920-5632",

publisher = "Elsevier",

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TY - JOUR

T1 - Measurement of the width difference of Bd mesons

AU - Dighe, A. S.

AU - Hurth, T.

AU - Kim, C. S.

AU - Yoshikawa, T.

N1 - Funding Information: The work of C.S.K. was supported by Grant No. 2001-042-DO0022 of the KRF. The work of T.Y. was supported in part by the US Department of Energy under Grant No.DE-FG02-97ER-41036.

PY - 2002/11

Y1 - 2002/11

N2 - We estimate ΔΓd/Γd, 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 ΔΓd/Γd 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 ΔΓd/Γd in the presence of new physics.

AB - We estimate ΔΓd/Γd, 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 ΔΓd/Γd 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 ΔΓd/Γd in the presence of new physics.

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