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On new physics in Delta Gammad

Bobeth, Christoph; Haisch, Ulrich; Lenz, Alexander; Pecjak, Ben; Tetlalmatzi-Xolocotzi, Gilberto

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Christoph Bobeth

Ulrich Haisch

Alexander Lenz

Gilberto Tetlalmatzi-Xolocotzi


Motivated by the recent measurement of the dimuon asymmetry by the DØ collaboration, which could be interpreted as an enhanced decay rate difference in the neutral B d -meson system, we investigate the possible size of new-physics contributions to ΔΓ d . In particular, we perform model-independent studies of non-standard effects associated to the dimension-six current-current operators (d¯¯¯p)(p¯¯¯′b) with p, p′ = u, c as well as (d¯¯¯p)(τ¯¯¯τ). In both cases we find that for certain flavour or Lorentz structures of the operators sizeable deviations of ΔΓ d away from the Standard Model expectation cannot be excluded in a model-independent fashion.


Bobeth, C., Haisch, U., Lenz, A., Pecjak, B., & Tetlalmatzi-Xolocotzi, G. (2014). On new physics in Delta Gammad. Journal of High Energy Physics, 2014(6), Article 40.

Journal Article Type Article
Acceptance Date May 25, 2014
Online Publication Date Jun 9, 2014
Publication Date Jun 1, 2014
Deposit Date Dec 4, 2015
Publicly Available Date Dec 4, 2015
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2014
Issue 6
Article Number 40
Keywords B-Physics, Heavy Quark Physics, Beyond Standard Model, CP violation.


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Copyright Statement
Open Access, © The Authors. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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