Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determination of 2beta_s in B_s -> J/psi K^+ K^- Decays in the Presence
  of a K^+K^- S-Wave Contribution   We present the complete differential decay rates for the process B_s -> J/psi
K^+ K^- including S-wave and P-wave angular momentum states for the K^+ K^-
meson pair. We examine the effect of an S-wave component on the determination
of the CP violating phase 2beta_s. Data from the B-factories indicate that an
S-wave component of about 10% may be expected in the phi(1020) resonance
region. We find that if this contribution is ignored in the analysis it could
cause a bias in the measured value of 2beta_s towards zero of the order of 10%.
When including the K^+K^- S-wave component we observe an increase in the
statistical error on 2beta_s by less than 15%. We also point out the
possibility of measuring the sign of cos2beta_s by using the interference
between the K^+K^- S-wave and P-wave amplitudes to resolve the strong phase
ambiguity. We conclude that the S-wave component can be properly taken into
account in the analysis.

18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an