Séminaires LAPP
Hot topics at LHCb and search for the rare decay Bs->mumu
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Europe/Paris
Auditorium M. Vivargent (LAPP)
Auditorium M. Vivargent
LAPP
Annecy-Le-Vieux
Description
The LHCb experiment at CERN's Large Hadron Collider is looking for
signatures of New Physics through precision measurements of processes
involving B mesons and other hadrons containing b or c quarks.
In particular, due to its sensitivity to New Physics contributions, the Branching Ratio
BR ($B_s \to \mu^+ \mu^-$) is one of the most interesting measurements
that LHCb can perform with first data.
The Standard Model (SM) prediction is
$BR(B_s \to \mu^+\mu^-) = (3.35 \pm 0.32) \times 10^{-9}$
while the current upper limit given by Tevatron is $BR < 36 \times 10^{-9}$ @ 90\%
CL, which is still one order of magnitude higher than SM prediction.
Monte Carlo simulations show that LHCb can compete with the Tevatron experiments
with approximately 0.1 fb$^{-1}$ of data collected at LHC with $pp$ collisions
at a center-of-mass energy of 7 TeV.
I will present the first result obtained by LHCb based on 40 pb-1 of data collected
between July and October 2010.
LHCb physics program is very broad and covers many topics in B and charm sectors, as
the mixing induced CP violating phase in Bs system, the mixing and CPV in charm system
and the gamma angle. I will present the results and prospects for measurements
that can be competitive with the data collected in the forthcoming 2011 run.