The effect of S-wave interference on the B-0 -> k(*0)l+l(-) angular observables
File(s)
Published version
OA Location
Author(s)
Blake, T
Egede, U
Shires, A
Type
Journal Article
Abstract
The rare decay B0→ K∗0ℓ+ℓ− is a flavour changing neutral current decay with a high sensitivity to physics beyond the Standard Model. Nearly all theoretical predictions and all experimental measurements so far have assumed a K∗0 P-wave that decays into the K+π− final state. In this paper the addition of an S-wave within the K+π− system of B0→ K∗0ℓ+ℓ− and the subsequent impact of this on the angular distribution of the final state particles is explored. The inclusion of the S-wave causes a distinction between the values of the angular observables obtained from counting experiments and those obtained from fits to the angular distribution. The effect of a non-zero S-wave on an angular analysis of B0→ K∗0ℓ+ℓ− is assessed as a function of dataset size and the relative size of the S-wave amplitude. An S-wave contribution, equivalent to what is measured in B0→ J/ψK∗0 at BaBar, leads to a significant bias on the angular observables for datasets of above 200 signal decays. Any future experimental analysis of the K+π−ℓ+ℓ− final state will have to take the S-wave contribution into account.
Date Issued
2013-03-01
Date Acceptance
2013-01-25
Citation
Journal of High Energy Physics, 2013, 2013 (3)
ISSN
1029-8479
Publisher
Springer Verlag (Germany)
Journal / Book Title
Journal of High Energy Physics
Volume
2013
Issue
3
Copyright Statement
© SISSA 2013
License URL
Sponsor
Science and Technology Facilities Council (STFC)
Grant Number
ST/K001604/1
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
PHYSICS, PARTICLES & FIELDS
Hadron-Hadron Scattering
Publication Status
Published
Article Number
027