%0 Journal Article %1 Lenz2012New %A Lenz, A. %A Nierste, U. %A Charles, J. %A Descotes-Genon, S. %A Lacker, H. %A Monteil, S. %A Niess, V. %A T'Jampens, S. %D 2012 %K bphysics %T New Physics in B-Bbar mixing in the light of recent LHCb data %U http://arxiv.org/abs/1203.0238 %X We perform model-independent statistical analyses of three scenarios accommodating New Physics (NP) in Delta F=2 flavour-changing neutral current amplitudes. In a scenario in which NP in B\_d-B\_d-bar and B\_s-B\_s-bar is uncorrelated, we find the parameter point representing the Standard-Model disfavoured by 2.7 standard deviations. However, recent LHCb data on B\_s neutral-meson mixing forbid a good accommodation of the D0 data on the semileptonic CP asymmetry A\_SL. We introduce a fourth scenario with NP in both M\_12^d,s and Gamma\_12^d,s, which can accommodate all data. We discuss the viability of this possibility and emphasise the importance of separate measurements of the CP asymmetries in semileptonic B\_d and B\_s decays. All results have been obtained with the CKMfitter analysis package, featuring the frequentist statistical approach and using Rfit to handle theoretical uncertainties.

@article{Lenz2012New, abstract = {{We perform model-independent statistical analyses of three scenarios accommodating New Physics (NP) in Delta F=2 flavour-changing neutral current amplitudes. In a scenario in which NP in B\_d-B\_d-bar and B\_s-B\_s-bar is uncorrelated, we find the parameter point representing the Standard-Model disfavoured by 2.7 standard deviations. However, recent LHCb data on B\_s neutral-meson mixing forbid a good accommodation of the D0 data on the semileptonic CP asymmetry A\_SL. We introduce a fourth scenario with NP in both M\_12^d,s and Gamma\_12^d,s, which can accommodate all data. We discuss the viability of this possibility and emphasise the importance of separate measurements of the CP asymmetries in semileptonic B\_d and B\_s decays. All results have been obtained with the CKMfitter analysis package, featuring the frequentist statistical approach and using Rfit to handle theoretical uncertainties.}}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Lenz, A. and Nierste, U. and Charles, J. and Descotes-Genon, S. and Lacker, H. and Monteil, S. and Niess, V. and T'Jampens, S.}, biburl = {https://www.bibsonomy.org/bibtex/224c6d223bb02eef57dc19d9ad02c742b/cmcneile}, citeulike-article-id = {10403581}, citeulike-linkout-0 = {http://arxiv.org/abs/1203.0238}, citeulike-linkout-1 = {http://arxiv.org/pdf/1203.0238}, day = 1, eprint = {1203.0238}, interhash = {05929dc375d5a4d9cf6a96103ed91037}, intrahash = {24c6d223bb02eef57dc19d9ad02c742b}, keywords = {bphysics}, month = mar, posted-at = {2012-03-02 08:41:08}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{New Physics in B-Bbar mixing in the light of recent LHCb data}}, url = {http://arxiv.org/abs/1203.0238}, year = 2012 }