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university of Provence - Aix-Marseille I |  |
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university of Provence - Aix-Marseille I | |
| HAL: in2p3-00675991, version 1 |
| arXiv: 1203.0238 |
| DOI: 10.1103/PhysRevD.86.033008 |
| Detailed view |  Export this paper |
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| Physical Review D 86 (2012) 033008 |
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| Constraints on new physics in B-Bbar mixing in the light of recent LHCb data |
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| A. LenzU. Nierste |
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| For the CKM Fitter collaboration(s) |
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| (2012) |
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| 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. |
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| 1: | Centre de Physique Théorique (CPT) |
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CNRS : FR2291 – Université de Provence - Aix-Marseille I – Université de la Méditerranée - Aix-Marseille II – Université Sud Toulon Var |
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| 2: | Laboratoire de Physique Théorique d'Orsay (LPT) |
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CNRS : UMR8627 – Université Paris XI - Paris Sud |
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| 3: | Laboratoire de Physique Corpusculaire de Clermont-Ferrand (LPC-CLERMONT) |
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CNRS : UMR6533 – IN2P3 – Université Blaise Pascal - Clermont-Ferrand II |
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| 4: | Laboratoire d'Annecy le Vieux de Physique des Particules (LAPP) |
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CNRS : UMR5814 – IN2P3 – Université de Savoie |
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| Subject(s) | : | Physics/High Energy Physics - Experiment Physics/High Energy Physics - Phenomenology |
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| Fulltext link: |
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| http://fr.arXiv.org/abs/1203.0238 |
| in2p3-00675991, version 1 | |
| http://hal.in2p3.fr/in2p3-00675991 | |
| oai:hal.in2p3.fr:in2p3-00675991 | |
| From: Nicole Berger | |
| Submitted on: Friday, 2 March 2012 15:25:45 | |
| Updated on: Tuesday, 6 November 2012 14:24:16 | |
