Observation of the decay $B_c^+ \to \psi(2S)\pi^+$

Aaij, R; Abellan Beteta, C; Adeva, B; Adinolfi, M; Adrover, C; Affolder, A; Ajaltouni, Z; Albrecht, J; Alessio, F; Alexander, M

doi:10.1103/PhysRevD.87.071103

Observation of the decay $B_c^+ \to \psi(2S)\pi^+$

LHCb

Collaboration

Mar 7, 2013

12 pages

Published in:

Phys.Rev.D 87 (2013) 071103

Published: Apr 26, 2013

e-Print:

1303.1737 [hep-ex]

DOI:

10.1103/PhysRevD.87.071103

PDG:

{{\mathit B}_{{{c}}}^{+}}

\rightarrow

{{\mathit \psi}{(2S)}}{{\mathit \pi}^{+}}

Report number:

CERN-PH-EP-2013-028,
LHCB-PAPER-2012-054

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (arXiv)

The decay

B_c^+ \to \psi(2S)\pi^+

with

\psi(2S) \to \mu^+\mu^-

is observed with a significance of

5.2\,\sigma

using

pp

collision data corresponding to an integrated luminosity of 1.0\,\invfb collected by the LHCb experiment. The branching fraction of

B_c^+ \to \psi(2S)\pi^+

decays relative to that of the

B_c^+ \to J/\psi\pi^+

mode is measured to be \begin{equation*} \frac{\mathcal{B}(B_c^+ \to \psi(2S)\pi^+)}{\mathcal{B}(B_c^+ \to J/\psi\pi^+)} = 0.250 \pm 0.068 \,\text{stat} \pm 0.014 \,\text{\syst} \pm 0.006 \,(\mathcal{B}). \end{equation*} The last term is the uncertainty on the ratio

\mathcal{B}(\psi(2S) \to \mu^+\mu^-)/\mathcal{B}(J/\psi \to \mu^+\mu^-)

.

Note:

12 pages including author list, 2 figures

p p: scattering
psi(3685): leptonic decay
B/c+
branching ratio
LHC-B
B/c+: hadronic decay
J/psi(3100): leptonic decay
experimental results
CERN LHC Coll
B/c+ --> psi(3685) pi+

References(32)

Figures(2)

[1]

Observation of the $B_c$ meson in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 81 (1998) 2432-2437
•
e-Print:
- hep-ex/9805034
•
DOI:
- 10.1103/PhysRevLett.81.2432

[2]

Measurement of the B(c)+ meson lifetime using B(c)+ ---> J/psi e+ nu(e)

CDF

Collaboration

•

A. Abulencia
(
- Illinois U., Urbana
)

et al.

- Phys.Rev.Lett. 97 (2006) 012002
•
e-Print:
- hep-ex/0603027
•
DOI:
- 10.1103/PhysRevLett.97.012002

[3]

Observation of the Decay $B^+$ -( $c$ ) $\to J/\psi \pi^\pm$ and Measurement of the $B^+$ -( $c$ ) Mass

CDF

Collaboration

•

T. Aaltonen
(
- Helsinki Inst. of Phys.
)

et al.

- Phys.Rev.Lett. 100 (2008) 182002
•
e-Print:
- 0712.1506
•
DOI:
- 10.1103/PhysRevLett.100.182002

[4]

Observation of the $B_c$ Meson in the Exclusive Decay $B_c \to J/\psi \pi$

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 101 (2008) 012001
•
e-Print:
- 0802.4258
•
DOI:
- 10.1103/PhysRevLett.101.012001

[5]

Uncertainties in estimating hadronic production of the meson $B_c$ and comparisons between TEVATRON and LHC

- Eur.Phys.J.C 38 (2004) 267-276
•
e-Print:
- hep-ph/0309121
•
DOI:
- 10.1140/epjc/s2004-02015-0

[6]

Experimental prospects of the B(c) studies of the LHCb experiment

Yuan-Ning Gao
(
- Tsinghua U., Beijing
)
,
Jibo He
(
- Tsinghua U., Beijing and
- Orsay, LAL
)
,
Patrick Robbe
(
- Orsay, LAL
)
,
Marie-Helene Schune
(
- Orsay, LAL
)
,
Zhen-Wei Yang
(
- Tsinghua U., Beijing
)

- Chin.Phys.Lett. 27 (2010) 061302
•
DOI:
- 10.1088/0256-307X/27/6/061302

[7]

Measurements of $B_c^+$ production and mass with the $B_c^+ \to J/\psi \pi^+$ decay

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 109 (2012) 232001
•
e-Print:
- 1209.5634
•
DOI:
- 10.1103/PhysRevLett.109.232001

[8]

First observation of the decay $B_c^+ \to J/\psi \pi^+\pi^-\pi^+$

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 108 (2012) 251802
•
e-Print:
- 1204.0079
•
DOI:
- 10.1103/PhysRevLett.108.251802

[9]

Weak decays of the $B_c$ meson to charmonium and $D$ mesons in the relativistic quark model

D. Ebert
(
- Humboldt U., Berlin
)
,
R.N. Faustov
(
- Humboldt U., Berlin and
- Moscow, Cybernetics Council
)
,
V.O. Galkin
(
- Humboldt U., Berlin and
- Moscow, Cybernetics Council
)

- Phys.Rev.D 68 (2003) 094020
•
e-Print:
- hep-ph/0306306
•
DOI:
- 10.1103/PhysRevD.68.094020

[10]

The Decays of B(c) meson

- Phys.Rev.D 49 (1994) 3399-3411
•
DOI:
- 10.1103/PhysRevD.49.3399

[11]

$B_c$ meson weak decays and CP violation

Jia-Fu Liu
(
- Peking U.
)
,
Kuang-Ta Chao
(
- CCAST World Lab, Beijing and
- Peking U.
)

- Phys.Rev.D 56 (1997) 4133-4145
•
DOI:
- 10.1103/PhysRevD.56.4133

[12]

Using heavy quark spin symmetry in semileptonic $B_c$ decays

Pietro Colangelo
(
- INFN, Bari
)
,
Fulvia De Fazio
(
- Geneva U.
)

- Phys.Rev.D 61 (2000) 034012
•
e-Print:
- hep-ph/9909423
•
DOI:
- 10.1103/PhysRevD.61.034012

[13]

B $_c$ exclusive decays to charmonium and a light meson at next-to-leading order accuracy

Cong-Feng Qiao
(
- Beijing, GUCAS
)
,
Peng Sun
(
- Peking U., CHEP and
- LBNL, NSD
)
,
Deshan Yang
(
- Beijing, GUCAS
)
,
Rui-Lin Zhu
(
- Beijing, GUCAS
)

- Phys.Rev.D 89 (2014) 3, 034008
•
e-Print:
- 1209.5859
•
DOI:
- 10.1103/PhysRevD.89.034008

[14]

The LHCb Detector at the LHC

LHCb

Collaboration

•

A.Augusto Alves, Jr.
(
- Rio de Janeiro, CBPF
)

et al.

- JINST 3 (2008) S08005
•
DOI:
- 10.1088/1748-0221/3/08/S08005

[15]

The LHCb Trigger and its Performance in 2011

R Aaij
(
- Nikhef, Amsterdam
)
,
J Albrecht
(
- CERN
)
,
F Alessio
(
- CERN
)
,
S Amato
(
- Rio de Janeiro Federal U.
)
,
E Aslanides
(
- Marseille, CPPM
)

et al.

- JINST 8 (2013) P04022
•
e-Print:
- 1211.3055
•
DOI:
- 10.1088/1748-0221/8/04/P04022

[16]

Review of Particle Physics (RPP)

J. Beringer
(
- LBL, Berkeley
)
,
J.F. Arguin
(
- LBL, Berkeley and
- Montreal U.
)
,
R.M. Barnett
(
- LBL, Berkeley
)
,
K. Copic
(
- LBL, Berkeley
)
,
O. Dahl
(
- LBL, Berkeley
)

et al.

- Phys.Rev.D 86 (2012) 010001
•
DOI:
- 10.1103/PhysRevD.86.010001

[17]

Classification and regression trees, Wadsworth international group, Belmont, California, USA, 1984

L. Breiman
,
J.H. Friedman
,
R.A. Olshen
,
C.J. Stone

[18]

PYTHIA 6.4 Physics and Manual

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)
,
Stephen Mrenna
(
- Fermilab
)
,
Peter Z. Skands
(
- Fermilab
)

- JHEP 05 (2006) 026
•
e-Print:
- hep-ph/0603175
•
DOI:
- 10.1088/1126-6708/2006/05/026

[19]

Handling of the generation of primary events in Gauss, the LHCb simulation framework, Nuclear Science Symposium Conference Record (NSS/MIC) (2010) 1155. 6