On new physics in Delta Gammad

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

Abstract

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.

Citation

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. https://doi.org/10.1007/jhep06%282014%29040

• 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
• DOI: https://doi.org/10.1007/jhep06%282014%29040
• Keywords: B-Physics, Heavy Quark Physics, Beyond Standard Model, CP violation.