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

Abulencia, A.; Adelman, Jahred A.; Affolder, T.; Akimoto, T.; Albrow, M.G.; Ambrose, D.; Amerio, S.; Amidei, D.; Anastassov, A.; Anikeev, K.

doi:10.1103/PhysRevLett.98.232001

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

Mar, 2007

7 pages

Published in:

Phys.Rev.Lett. 98 (2007) 232001

e-Print:

hep-ex/0703028 [hep-ex]

DOI:

10.1103/PhysRevLett.98.232001

Report number:

FERMILAB-PUB-07-066-E

Experiments:

FNAL-E-0830

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Citations per year

Abstract:

We measure the ratio of cross section times branching fraction,

R_p \equiv \sigma_{\chi_{c2}} {\cal B}(\chi_{c2} \to J/\psi \gamma)/ \sigma_{\chi_{c1}} {\cal B}(\chi_{c1} \to J/\psi \gamma)

, in 1.1 fb

^{-1}

of

p\bar{p}

collisions at

\sqrt{s} =

1.96 TeV. This measurement covers the kinematic range

p_T(J/\psi)>4.0

GeV/

c

,

|\eta(J/\psi)| < 1.0

, and

p_T(\gamma)>1.0

GeV/

c

. For events due to prompt processes, we find

R_p = 0.395\pm0.016(stat.)\pm0.015(sys.)

. This result represents a significant improvement in precision over previous measurements of prompt

\chi_{c1,2}

hadroproduction.

13.60.Le
13.85.Qk
anti-p p: colliding beams
anti-p p: inclusive reaction
chi/c1(3510): hadroproduction
chi/c2(3555): hadroproduction
chi mesons: radiative decay
J/psi(3100): leptonic decay
channel cross section: branching ratio
B: hadroproduction

References(14)

Figures(0)

Comparison of the color-evaporation model and the NRQCD factorization approach in charmonium production

- Phys.Rev.D 72 (2005) 014004
•
e-Print:
- hep-ph/0504014
•
DOI:
- 10.1103/PhysRevD.72.014004

Charmonium production at high energy in the $k_{T}$ -factorization approach

- Phys.Rev.D 73 (2006) 074022
•
e-Print:
- hep-ph/0602179
•
DOI:
- 10.1103/PhysRevD.73.074022

Production of $J/\psi$ mesons from $\chi_c$ meson decays in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 79 (1997) 578-583
•
DOI:
- 10.1103/PhysRevLett.79.578

Production of charmonium states in $\pi^{-}$ Be collisions at 515-GeV/c

E672-E706

Collaboration

•

V. Koreshev

et al.

- Phys.Rev.Lett. 77 (1996) 4294-4297,
- ICHEP 96:995-998
•
DOI:
- 10.1103/PhysRevLett.77.4294

Hadroproduction of the $\chi_1$ and $\chi_2$ States of Charmonium in 800-GeV/c Proton Silicon Interactions

E771

Collaboration

•

T. Alexopoulos
(
- Wisconsin U., Madison
)

et al.

- Phys.Rev.D 62 (2000) 032006
•
e-Print:
- hep-ex/9908010
•
DOI:
- 10.1103/PhysRevD.62.032006

Production of $\chi_{c1}$ and $\chi_{c2}$ in $p\bar{p}$ Collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

T. Affolder
(
- LBL, Berkeley
)

et al.

- Phys.Rev.Lett. 86 (2001) 3963-3968
•
DOI:
- 10.1103/PhysRevLett.86.3963

Heavy Quarkonium Physics

N. Brambilla
(
- Milan U. and
- INFN, Milan
)
,
M. Krämer
(
- Edinburgh U., Sch. Math.
)
,
R. Mussa
(
- INFN, Turin
)
,
A. Vairo
(
- Milan U. and
- CFIF, Lisbon
)
,
G. Bali
(
- Glasgow U.
)

et al.

- CERN Yellow Report, CERN-2005-005, Geneva: CERN, 2005.- 487 p
•
e-Print:
- hep-ph/0412158
•
DOI:
- 10.5170/CERN-2005-005

Review of Particle Physics

et al.

- J.Phys.G 33 (2006) 1-1232
•
DOI:
- 10.1088/0954-3899/33/1/001

Measurement of the $J/\psi$ meson and $b-$ hadron production cross sections in $p\bar{p}$ collisions at $\sqrt{s} = 1960$ GeV

CDF

Collaboration

•

D. Acosta
(
- Florida U.
)

et al.

- Phys.Rev.D 71 (2005) 032001
•
e-Print:
- hep-ex/0412071
•
DOI:
- 10.1103/PhysRevD.71.032001

The Silicon Vertex Detector of the Collider Detector at Fermilab

CDF

Collaboration

•

D. Amidei
(
- Michigan U.
)

et al.

- Nucl.Instrum.Meth.A 350 (1994) 73-130
•
DOI:
- 10.1016/0168-9002(94)91156-8

Evidence for top quark production in $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe

et al.

- Phys.Rev.D 50 (1994) 2966-3026
•
DOI:
- 10.1103/PhysRevD.50.2966

Cosmic-ray theory

- Rev.Mod.Phys. 13 (1941) 240-309
•
DOI:
- 10.1103/RevModPhys.13.240

- Phys.Rev.Lett. 79 573

Ratio of branching fractions for chi(cJ) $\to \gamma J/\psi$

R.S. Galik
(
- Cornell U., Phys. Dept.
)
,
B.K. Heltsley
(
- Cornell U., Phys. Dept.
)
,
H. Mahlke
(
- Cornell U., Phys. Dept.
)

e-Print:
- hep-ex/0608056

Measurement of σχc2B(χc2→J/ψγ)/σχc1B(χc1→J/ψγ)\sigma_{\chi_{c2}}{\cal B}(\chi_{c2} \to J/\psi \gamma)/\sigma_{\chi_{c1}} {\cal B}(\chi_{c1} \to J/\psi \gamma)σχc2​​B(χc2​→J/ψγ)/σχc1​​B(χc1​→J/ψγ) in ppˉp \bar{p}ppˉ​ Collisions at s\sqrt{s}s​ = 1.96-TeV

Citations per year

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