Measurement of the cross-section ratio $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ for prompt $\chi_c$ production at $\sqrt{s}=7$ TeV

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

doi:10.1016/j.physletb.2012.06.077

Measurement of the cross-section ratio $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ for prompt $\chi_c$ production at $\sqrt{s}=7$ TeV

LHCb

Collaboration

Feb, 2012

9 pages

Published in:

Phys.Lett.B 714 (2012) 215-223

Published: Jul 16, 2013

e-Print:

1202.1080 [hep-ex]

DOI:

10.1016/j.physletb.2012.06.077

Report number:

LHCB-PAPER-2011-019,
CERN-PH-EP-2011-227

Experiments:

CERN-LHC-LHCb

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Abstract:

The prompt production of the charmonium

\chi_{c1}

and

\chi_{c2}

mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of

\sqrt{s}=7

TeV. The

\chi_c

mesons are identified through their decays

\chi_c\to J/\psi\,\gamma

with

J/\psi \to \mu^+ \mu^-

using 36

\mathrm{pb^{-1}}

of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for the two

\chi_c

spin states,

\sigma(\chi_{c2})/\sigma(\chi_{c1})

, has been determined as a function of the

J/\psi

transverse momentum,

p_{\mathrm{T}}^{J/\psi}

, in the range from 2 to 15 GeV/

c

. The results are in agreement with the next-to-leading order non-relativistic QCD model at high

p_{\mathrm{T}}^{J/\psi}

and lie consistently above the pure leading-order colour singlet prediction.

channel cross section: ratio: measured
quantum chromodynamics: nonrelativistic
charmonium: direct production
p p: scattering
LHC-B
chi/c1(3510): hadroproduction
chi/c2(3555): hadroproduction
chi mesons: radiative decay
J/psi(3100): transverse momentum
transverse momentum dependence

References(15)

Figures(8)

Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium

- Phys.Rev.D 51 (1995) 1125-1171,
- Phys.Rev.D 55 (1997) 5853 (erratum)
•
e-Print:
- hep-ph/9407339
•
DOI:
- 10.1103/PhysRevD.55.5853

Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium

- Phys.Rev.D 51 (1995) 1125-1171,
- Phys.Rev.D 55 (1997) 5853 (erratum)
•
e-Print:
- hep-ph/9407339
•
DOI:
- 10.1103/PhysRevD.55.5853

QCD corrections to J/psi and Upsilon production at hadron colliders

John M. Campbell
(
- Glasgow U.
)
,
F. Maltoni
(
- Louvain U., CP3
)
,
F. Tramontano
(
- INFN, Naples and
- Naples U.
)

- Phys.Rev.Lett. 98 (2007) 252002
•
e-Print:
- hep-ph/0703113
•
DOI:
- 10.1103/PhysRevLett.98.252002

QCD radiative corrections to $\chi_{cJ}$ production at hadron colliders

Yan-Qing Ma
(
- Peking U. and
- Peking U., CAPT
)
,
Kai Wang
(
- Peking U. and
- Peking U., CAPT
)
,
Kuang-Ta Chao
(
- Peking U. and
- Peking U., CAPT
)

- Phys.Rev.D 83 (2011) 111503
•
e-Print:
- 1002.3987
•
DOI:
- 10.1103/PhysRevD.83.111503

Measurement of Hadronic Production of the $\chi$ 1++ (3507) and the $\chi$ 2++ (3553) Through Their Radiative Decay to $J/\psi$

et al.

- Phys.Lett.B 113 (1982) 509,
- Phys.Lett.B 116 (1982) 470 (erratum)
•
DOI:
- 10.1016/0370-2693(82)90795-X

Production of the Charmonium States $\chi_{c1}$ and $\chi_{c2}$ in Proton Nucleus Interactions at $\sqrt{s}$ = 41.6-GeV

HERA-B

Collaboration

•

I. Abt
(
- Munich, Max Planck Inst.
)

et al.

- Phys.Rev.D 79 (2009) 012001
•
e-Print:
- 0807.2167
•
DOI:
- 10.1103/PhysRevD.79.012001

Measurement of $\sigma_{\chi_{c2}}{\cal B}(\chi_{c2} \to J/\psi \gamma)/\sigma_{\chi_{c1}} {\cal B}(\chi_{c1} \to J/\psi \gamma)$ in $p \bar{p}$ Collisions at $\sqrt{s}$ = 1.96-TeV

CDF

Collaboration

•

A. Abulencia
(
- Illinois U., Urbana
)

et al.

- Phys.Rev.Lett. 98 (2007) 232001
•
e-Print:
- hep-ex/0703028
•
DOI:
- 10.1103/PhysRevLett.98.232001

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

The EvtGen particle decay simulation package

D.J. Lange
(
- LLNL, Livermore
)

- Nucl.Instrum.Meth.A 462 (2001) 152-155
•
DOI:
- 10.1016/S0168-9002(01)00089-4

PHOTOS: A Universal Monte Carlo for QED radiative corrections. Version 2.0

Elisabetta Barberio
(
- CERN and
- Siegen U.
)
,
Zbigniew Was
(
- CERN and
- Cracow, INP
)

- Comput.Phys.Commun. 79 (1994) 291-308
•
DOI:
- 10.1016/0010-4655(94)90074-4

GEANT4 - A Simulation Toolkit

GEANT4

Collaboration

•

S. Agostinelli
(
- Genoa U.
)

et al.

- Nucl.Instrum.Meth.A 506 (2003) 250-303
•
DOI:
- 10.1016/S0168-9002(03)01368-8

Measurement of $J/\psi$ production in $pp$ collisions at $\sqrt{s}=7~\rm{TeV}$

LHCb

Collaboration

•

R. Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Eur.Phys.J.C 71 (2011) 1645
•
e-Print:
- 1103.0423
•
DOI:
- 10.1140/epjc/s10052-011-1645-y

Review of particle physics

K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
H. Murayama
(
- LBL, Berkeley and
- UC, Berkeley and
- Tokyo U., IPMU
)
,
M. Tanabashi
(
- Nagoya U.
)

et al.

- J.Phys.G 37 (2010) 075021
•
DOI:
- 10.1088/0954-3899/37/7A/075021

J/psi Production at Large Transverse Momentum at Hadron Colliders

- Z.Phys.C 38 (1988) 473,
- Z.Phys.C 49 (1991) 526 (erratum)
•
DOI:
- 10.1007/BF01584398

Measurement of the cross-section ratio σ(χc2)/σ(χc1)\sigma(\chi_{c2})/\sigma(\chi_{c1})σ(χc2​)/σ(χc1​) for prompt χc\chi_cχc​ production at s=7\sqrt{s}=7s​=7 TeV

Citations per year

Measurement of the cross-section ratio $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ for prompt $\chi_c$ production at $\sqrt{s}=7$ TeV