Abstract
The LHCb experiment has collected the world's largest sample of charmed hadrons. Using data corresponding to an integrated luminosity of 3.0 fb−1 recorded in 2011 and 2012, measurements of direct and indirect CP violation in the charm sector and of D0 mixing parameters were performed. Results from several decay modes are presented with complementary time-dependent and time-integrated analyses.
Highlights
Background data dataFit (χ2/ndof = 1.27) Background data +20000 1600×0103 ⇤+Fit (χ2/ndof = 1.24) Background dataFit (χ2/ndof = 1.40) Background dataK K : 2.24 million events 000 D0→KK D0→ππThe raw 2000 asymmetry for tagged decays to a final 420000 state f is given by
Measured raw asymmetry ARAW may be written as a sum of components that are physics and detector effects: ARAW (f )⇤ = ACP (f ) + AD(f ) + AD(⇡s) + AP (D⇤)
In any given kinematic region AD(πs) and AP(D*) are independent of f and in the first-order those terms cancel if we subtract raw asymmetries
Summary
Two production ty"pesPorof mchpartmc:harm more abundant Secondary-like background Total. 4.1 ctly " Secondary can have higher purity Table 1. Ipnrtohme pptrim–"aprryoMdvueucrsteetdxdd(PiirseVcc)rtliyminate betwe10e3 n them LHCb. Chris Parkes ry can have higher purity ate (sb>ee5c0tow%nedoeaf rnBy→t–hDpeXrmo)duced in B decays ct parameter. Ln χ2(IPD4) fit projection of D0 → K+K− candidates in logarithmic sca data (points), the total fit (green, solid), the prompt signal (blue, short-dashed), and signal (purple, long-dashed). The lower two plot shows the pull distribution which is. To separate prompt charm anddiffseerecncoe nofddaataryandchmoadreml divdideedcbay ythse uwnceertauinstye.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
