Reducing the Error on alpha in B-> pi pi, rho rho, rho pi

Details Reducing the Error on alpha in B-> pi pi, rho rho, rho pi Reducing the Error on alpha in B-> pi pi, rho rho, rho pi

2004-10-12

arxiv.org/abs/hep-ph/0410170v3

Phys.Lett. B606 (2005) 95-102

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures, small corrections, few references added, final version to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2004.11.082

Theoretical errors in the extraction of alpha from B -> pi^+ pi^-, rho^+ rho^-, rho pi decays are usually given in terms of upper bounds on alpha_eff-alpha obtained from isospin or from SU(3) relations, where alpha_eff is measured through CP asymmetries. We show that mild assumptions about magnitudes and strong phases of penguin and tree amplitudes (|P/T| < 1 and |delta| < pi/2) in B -> pi pi and B -> rho rho, imply alpha_eff > alpha, thus reducing by a factor two the error in alpha. Similarly, the assumptions |p_+-/t_+-| < 1, |\delta_-| < pi/2 <|\delta_+| in B -> rho pi lead to a cancellation between two terms in alpha_eff-alpha. Current data support these conditions.

Affiliated with

Also associated with

No associations

Rating

Reducing the Error on alpha in B-> pi pi, rho rho, rho pi does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Reducing the Error on alpha in B-> pi pi, rho rho, rho pi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reducing the Error on alpha in B-> pi pi, rho rho, rho pi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-718501