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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
M. Borsato - LAL LHCb - Rare decays 4
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
M. Borsato - LAL LHCb - Rare decays 5
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 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
M. Borsato - LAL LHCb - Rare decays 12
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
M. Borsato - LAL LHCb - Rare decays 16
PRD79 014013
PRD81 074001
PRD81 074001
PRD80,016009
PRD80,016009
HEP-PH/9706247,HEP-PH/9609503
HEP-PH/9706247,HEP-PH/9609503
M. Borsato - LAL LHCb - Rare decays 17
M. Borsato - LAL LHCb - Rare decays 18
accurate at 5% level
Becirevic et al. JHEP 08 (2012) 090
M. Borsato - LAL LHCb - Rare decays 19
Angles definitions
M. Borsato - LAL LHCb - Rare decays 20
Effective q²
Reconstructed q²(background subtracted by sPlot)
M. Borsato - LAL LHCb - Rare decays 21
Low q² limit
It is experimentally driven:
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