Measurement of the branching fraction and $$C\!P$$ C P asymmetry in $${{{B} ^+}} \!\rightarrow {{J /\psi }} {{\rho } ^+} $$ B + → J / ψ ρ + decays
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Author(s)
Aaij, R.
Beteta, C. A
Adeva, B.
Adinolfi, M.
Aidala, C. A
Ajaltouni, Z.
Akar, S.
Albicocco, P.
Albrecht, J.
Alessio, F.
Date Issued
June 24, 2019
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2019 Jun 24;79(6):537
Version
Final published version
Abstract
Abstract
The branching fraction and direct
$$C\!P$$
C
P
asymmetry of the decay
$${{{B} ^+}} \!\rightarrow {{J /\psi }} {{\rho } ^+} $$
B
+
→
J
/
ψ
ρ
+
are measured using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to a total integrated luminosity of 3
$$\,\text{ fb }^{-1}$$
fb
-
1
. The following results are obtained:
$$\begin{aligned} \mathcal {B}({{B} ^+} \!\rightarrow {{J /\psi }} {{\rho } ^+} )&= (3.81^{+0.25}_{-0.24} \pm 0.35) \times 10^{-5},\\ \mathcal {A}^{{C\!P}} ({{B} ^+} \!\rightarrow {{J /\psi }} {{\rho } ^+} )&= -0.045^{+0.056}_{-0.057} \pm 0.008, \end{aligned}$$
B
(
B
+
→
J
/
ψ
ρ
+
)
=
(
3
.
81
-
0.24
+
0.25
±
0.35
)
×
10
-
5
,
A
C
P
(
B
+
→
J
/
ψ
ρ
+
)
=
-
0
.
045
-
0.057
+
0.056
±
0.008
,
where the first uncertainties are statistical and the second systematic. Both measurements are the most precise to date.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-019-6698-3
