Martino BorsatoOn behalf of the LHCb collaboration

Lake Louise Winter InstituteChateau Lake Louise 15-21 February 2015

M. Borsato - LAL LHCb - Rare decays 2

Rare decays as BSM probes

Mainly FCNC through penguin or box diagrams

M. Borsato - LAL LHCb - Rare decays 3

Selected results in rare B decays

LHCb: PRD 113(2014),151601BaBar: PRD 86(2012),032012 Belle: PRD 103(2009),171801

LHCb PRL 111 (2013) 191801

Altmannshofer et al.PRD 89(2014),095033, Lyon and Zwicky arXiv:1406.0566

LHCb: PRD 113(2014),151601

Review paper: Blake et al. arXiv:1501.03309

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Rare charm decays

LHCb PLB 725 (2013) 15-24

LHCb PLB 724 (2013) 203-212

LHCb PLB 728 (2014) 234-243

LHCb

LHCbLHCb LHCb

HFAG (2014) arXiv:1412.7515 HFAG (2014) arXiv:1412.7515

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Latest results

LHCb arXiv:1412.6433

LHCb arXiv:1501.03038

M. Borsato - LAL LHCb - Rare decays 6

NEW!

modes never seen before

LHCb:PRD89 (2014) 092006, LHCb:PRD90 (2014) 012003

R. Mohanta PRD84 (2011) 014019, Bashiry et al. JHEP02 (2012) 021,

Aliev et al. PRD60 (1999) 014005, Wang et al. PRD77 (2008) 014017

R.-H. Li et al. PRD79 (2009) 014013,

Colangelo et al. PRD81 (2010) 074001,

Ghahramany and Khosravi PRD80 (2009) 016009,

Kruger and Sehgal PRD56 (1997) 5452,

Melikhov and Nikitin arXiv:hep-ph/9609503,

Beneke et al. EPJ C41 (2005) 173

LHCb arXiv:1412.6433

M. Borsato - LAL LHCb - Rare decays 7

NEW!LHCb arXiv:1412.6433

M. Borsato - LAL LHCb - Rare decays 8

NEW!LHCb arXiv:1412.6433

BaBar PRD76 (2007) 092004,

Belle PLB538 (2002) 11,

CLEO PRL79 (1997) 4533

LHCb-CONF-2013-011

M. Borsato - LAL LHCb - Rare decays 9

NEW!

Grossman et al. JHEP06 (2000) 029Jäger et al. JHEP05 (2013) 043

Everett et al. JHEP01 (2002) 022, Foster et al. PRB641 (2006) 452, Lunghi et al. JHEP 04 (2007) 058, Goto et al. PRD77 (2008) 095010

Blake et al. arXiv:1501.03309

LHCb arXiv:1501.03038

LHCb: JHEP05 (2013) 159

angle definitions as in LHCb JHEP 08 (2013) 131

M. Borsato - LAL LHCb - Rare decays 10

NEW!

angular fit region

124 signal events

LHCb arXiv:1501.03038

M. Borsato - LAL LHCb - Rare decays 11

NEW!

Becirevic et al. NPB854 (2012) 321

accurate at 5% level

LHCb arXiv:1501.03038

Kruger et al. PRD71 (2005) 094009Becirevic et al. NPB854 (2012) 321

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NEW!

Adapted from Jäger and Camalich arXiv:1412.3183

LHCb arXiv:1501.03038

BaBar PRD78 (2008) 071102, Belle PRD74 (2006) 111104

Precise SM predictions

M. Borsato - LAL LHCb - Rare decays 13

Summary

M. Borsato - LAL LHCb - Rare decays 14

backup slides

M. Borsato - LAL LHCb - Rare decays 15

The LHCb experimentA dedicated flavour physics experiment in the forward region at the LHC

TrackingVELO PID Calorimeters Muon

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PRD79 014013

PRD81 074001

PRD81 074001

PRD80,016009

PRD80,016009

HEP-PH/9706247,HEP-PH/9609503

HEP-PH/9706247,HEP-PH/9609503

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M. Borsato - LAL LHCb - Rare decays 18

accurate at 5% level

Becirevic et al. JHEP 08 (2012) 090

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Angles definitions

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Effective q²

Reconstructed q²(background subtracted by sPlot)

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Low q² limit

It is experimentally driven: