The width difference of BD mesons

Amol Dighe; Tobias Hurth; Choong Sun Kim; Tadashi Yoshikawa

The width difference of B_D mesons

Amol Dighe, Tobias Hurth, Choong Sun Kim, Tadashi Yoshikawa

Department of Physics

Research output: Contribution to journal › Conference article

Abstract

We estimate ?G_d/G_d, including 1/m_b contributions and part of the next-to-leading order QCD corrections. We find that adding the latter corrections decreases the value of ?G_d/G_d computed at the leading order by a factor of almost 2. We also show that under certain conditions an upper bound on the value of ?G_d/G_d in the presence of new physics can be derived. With the high statistics and accurate time resolution of the upcoming LHC experiment, the measurement of ?G_d seems to be possible. This measurement would be important for an accurate measurement of sin(2ß) at the LHC. In addition, we point out the possibility that the measurement of width difference leads to a clear signal for new physics.

Original language	English
Journal	Proceedings of Science
Volume	7
Publication status	Published - 2001 Jan 1
Event	2001 International Europhysics Conference on High Energy Physics, HEP 2001 - Budapest, Hungary Duration: 2001 Jul 12 → 2001 Jul 18

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Cite this

Dighe, A., Hurth, T., Kim, C. S., & Yoshikawa, T. (2001). The width difference of B_D mesons. Proceedings of Science, 7.

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title = "The width difference of BD mesons",

abstract = "We estimate ?Gd/Gd, including 1/mb contributions and part of the next-to-leading order QCD corrections. We find that adding the latter corrections decreases the value of ?Gd/Gd computed at the leading order by a factor of almost 2. We also show that under certain conditions an upper bound on the value of ?Gd/Gd in the presence of new physics can be derived. With the high statistics and accurate time resolution of the upcoming LHC experiment, the measurement of ?Gd seems to be possible. This measurement would be important for an accurate measurement of sin(2{\ss}) at the LHC. In addition, we point out the possibility that the measurement of width difference leads to a clear signal for new physics.",

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T1 - The width difference of BD mesons

AU - Dighe, Amol

AU - Hurth, Tobias

AU - Kim, Choong Sun

AU - Yoshikawa, Tadashi

PY - 2001/1/1

Y1 - 2001/1/1

N2 - We estimate ?Gd/Gd, including 1/mb contributions and part of the next-to-leading order QCD corrections. We find that adding the latter corrections decreases the value of ?Gd/Gd computed at the leading order by a factor of almost 2. We also show that under certain conditions an upper bound on the value of ?Gd/Gd in the presence of new physics can be derived. With the high statistics and accurate time resolution of the upcoming LHC experiment, the measurement of ?Gd seems to be possible. This measurement would be important for an accurate measurement of sin(2ß) at the LHC. In addition, we point out the possibility that the measurement of width difference leads to a clear signal for new physics.

AB - We estimate ?Gd/Gd, including 1/mb contributions and part of the next-to-leading order QCD corrections. We find that adding the latter corrections decreases the value of ?Gd/Gd computed at the leading order by a factor of almost 2. We also show that under certain conditions an upper bound on the value of ?Gd/Gd in the presence of new physics can be derived. With the high statistics and accurate time resolution of the upcoming LHC experiment, the measurement of ?Gd seems to be possible. This measurement would be important for an accurate measurement of sin(2ß) at the LHC. In addition, we point out the possibility that the measurement of width difference leads to a clear signal for new physics.

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Y2 - 12 July 2001 through 18 July 2001