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SUMMARY:New predictions for R(D) and R(D*)
DTSTART;VALUE=DATE-TIME:20170327T234500Z
DTEND;VALUE=DATE-TIME:20170328T002000Z
DTSTAMP;VALUE=DATE-TIME:20260406T144552Z
UID:indico-contribution-24@cern.ch
DESCRIPTION:Speakers: LIGETI\, Zoltan ()\nI discuss results of a new 
 combined fit to the B->D(∗)lν decay distributions to predict the 
 B->D(∗)τν rates and determine the CKM matrix element |Vcb|.  Past 
 theoretical and experimental papers neglected uncertainties in the 
 predictions for form factor ratios at order 1/m\, which we include.  We 
 study in detail the theoretical uncertainties in the SM predictions for 
 R(D) and R(D*).  We calculate 1/m and alpha_s contributions to for all 
 possible b->c currents\, which has not been available for all form 
 factors\, and allow us to determine with improved precision how new 
 physics may affect the B->D(∗)τν rates. Our predictions can be 
 systematically improved with more data\; they need not rely on lattice QCD
  results\, although these can be incorporated. (This talk is based on http
 s://arxiv.org/abs/1703.05330)\n\nhttps://agenda.hepl.phys.nagoya-u.ac.jp/i
 ndico/contributionDisplay.py?contribId=24&confId=702
LOCATION:ES building\, Higashiyama Campus\, Nagoya University KMI Science 
 Symposia (ES635)
URL:https://agenda.hepl.phys.nagoya-u.ac.jp/indico/contributionDisplay.py?c
 ontribId=24&confId=702
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