Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Collection
For ¥0.57 per day, unlimited downloads CREATE MEMBERSHIP Download

toTop

If you have any feedback, Please follow the official account to submit feedback.

Turn on your phone and scan

home > search >

Light-cone sum rules for B ->pi form factors revisited

Author:
Duplancic, G.  Khodjamirian, A.  Mannel, Th.  Melic, B.  Offen, N.  


Journal:
JOURNAL OF HIGH ENERGY PHYSICS


Issue Date:
2008


Abstract(summary):

We reconsider and update the QCD light-cone sum rules for B ->pi form factors. The gluon radiative corrections to the twist-2 and twist-3 terms in the correlation functions are calculated. The (MS) over bar b-quark mass is employed, instead of the one-loop pole mass used in the previous analyses. The light-cone sum rule for f(B pi)(+)(q(2)) is fitted to the measured q(2)-distribution in B ->pi l nu(l), fixing the input parameters with the largest uncertainty: the Gegenbauer moments of the pion distribution amplitude. For the B ->pi vector form factor at zero momentum transfer we predict f(B pi)(+)(0)=0.26(-0.030)(+0.04). Combining it with the value of the product vertical bar V(ub)f(B pi)(+)(0)vertical bar extracted from experiment, we obtain vertical bar V-ub vertical bar=(3.5 +/- 0.4 +/- 0.2 +/- 0.1)x10(-3). In addition, the scalar and penguin B ->pi form factors f(B pi)(0)(q(2)) and f(B pi)(T)(q(2)) are calculated.


VIEW PDF

The preview is over

If you wish to continue, please create your membership or download this.

Create Membership

Similar Literature

Submit Feedback

This function is a member function, members do not limit the number of downloads