Estimate of the Branching Fraction of tau --> pi eta' nu_tau

Details Estimate of the Branching Fraction of tau --> pi eta' nu_tau Estimate of the Branching Fraction of tau --> pi eta' nu_tau

2009-07-21

arxiv.org/abs/0907.3628v1

Phys.Rev.D80:033010,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, to be submitted to PRD

Scientific paper

10.1103/PhysRevD.80.033010

We calculate the expected branching fraction of the second-class-current decay tau --> pi eta' nu, motivated by a a recent experimental upper-limit determination of this quantity. The largest contribution to the branching fraction is due to the intermediate a0(980) scalar meson, assuming it is a $\bar ud$ state. Smaller contributions arise from a0(1450), rho(770), and rho(1450). Our calculated values are substantially below the experimental upper limit, and are smaller still if the a0(980) is a four-quark state, as often suggested. Thus, a precise measurement or tight upper limit has the potential to determine the nature of the a0(980), as well as search for new scalar interactions.

Affiliated with

Also associated with

No associations

Rating

Estimate of the Branching Fraction of tau --> pi eta' nu_tau 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 Estimate of the Branching Fraction of tau --> pi eta' nu_tau, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Estimate of the Branching Fraction of tau --> pi eta' nu_tau will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-175841