branching ratio

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branching ratio

A relationship defining the probability that a particular set, X, of products will be produced in a fusion reaction involving 2 nuclei, in which there is a limited number of possible sets of products that can form.
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Similar to the situation of scenario I, the NP effect of [S.sub.L] and [S.sub.R] on [R.sup.*.sub.P] is much more significant than the one on branching fraction due to the theoretical uncertainties of [R.sup.*.sub.P] which can be well controlled.
Thanks to the fruitful running of the B factories and Large Hadron Collider (LHC) in the past years, most of the [B.sub.u,d] mesons decays with branching fractions [??] O([10.sup.-7]) have been measured.
The analysis carried out involves comparison of branching fraction of a certain decay process (mentioned above) calculated from both theoretical and experimental ground.
These plots relate the branching fraction of the said process with the magnitude and phase of NP parameters ([absolute value of (z([[lambda]'.sub.ik1][[lambda]'.sup.*.sub.ik2]))] and [theta]).
If we take [GAMMA]([psi](4040) [right arrow] [e.sup.+][e.sup.-]) and [GAMMA]([psi](4415) [right arrow] [e.sup.+][e.sup.-]) values from world averages [16], we can obtain the branching fractions B([psi](4040) [right arrow] [eta]J/[psi]) = (4.2 [+ or -] 1.2) x [10.sup.-3] or (4.8 [+ or -] 1.5) x [10.sup.-3] and B([psi](4415) [right arrow] [eta]J/[psi]) = (1.2 [+ or -] 0.6) x [10.sup.-3] or (2.4 [+ or -] 1.3) x [10.sup.-3].
The branching fractions are B([psi](4040) [right arrow] [eta]J/[psi]) = (4.2 [+ or -] 1.2) x [10.sup.-3] or (4.8 [+ or -] 1.5) x [10.sup.-3] and B([psi](4415) [right arrow] [eta]J/[psi]) = (1.2 [+ or -] 0.6) x [10.sup.-3] or (2.4 [+ or -] 1.3) x [10.sup.-3].
Using the parametrization of the matrix elements in terms of form factors calculated via light cone QCD sum rules in the full theory, we calculated the differential decay width and numerically analyzed the differential branching fraction and the lepton forward-backward asymmetry in terms of [q.sup.2] in different heavy baryonic decay channels for both [mu] and [tau] leptons in both scenarios.
[2] The LHCb Collaboration, "Differential branching fraction and angular analysis of [[LAMBDA].sup.0.sub.b] [right arrow] [LAMBDA][[mu].sup.+][[mu].sup.-] decays," JHEP, vol.
This leads to a change of 0.05% on the expected upper limit on the branching fraction of t [right arrow] qg.
In addition, absolute branching fraction determinations have been made difficult by the relatively large uncertainty on B([[LAMBDA].sup.+.sub.c] [right arrow] p[K.sup.-][[pi].sup.+]).
Caption: Figure 8: Branching fractions of graviton, G (from [12]).
Tarbert (CLEO Collaboration) et al., "Measurements of branching fractions for electromagnetic transitions involving the [chi]bJ/(1P) states," Physical Review D, vol.