Measurement of <script type="math/tex">\sigma_{\chi_{c2}}\mathcal{B}(\chi_{c2}\rightarrow J/\psi\gamma)/\sigma_{\chi_{c1}}\mathcal{B}(\chi_{c1}\rightarrow J/\psi\gamma</script> in <script type="math/tex">p\overline{p}</script> collisions at <script type="math/tex">\sqrt{s}</script>=1.96 TeV

Abulencia, A.; Van Remortel, N.; et al.

doi:10.1103/PHYSREVLETT.98.232001

Publication

Title

Measurement of $\sigma_{\chi_{c2}}\mathcal{B}(\chi_{c2}\rightarrow J/\psi\gamma)/\sigma_{\chi_{c1}}\mathcal{B}(\chi_{c1}\rightarrow J/\psi\gamma$ in $p\overline{p}$ collisions at $\sqrt{s}$ =1.96 TeV

Author

Abulencia, A.

Van Remortel, N.

et al.

Institution/Organisation

CDF Collaboration

Abstract

We measure the ratio of cross section times branching fraction, Rp=σχc2B(χc2→J/ψγ)/σχc1B(χc1→J/ψγ), in 1.1 fb-1 of pp̅ collisions at √s=1.96 TeV. This measurement covers the kinematic range pT(J/ψ)>4.0 GeV/c, |η(J/ψ)<1.0, and pT(γ)>1.0 GeV/c. For events due to prompt processes, we find Rp=0.395±0.016(stat)±0.015(syst). This result represents a significant improvement in precision over previous measurements of prompt χc1,2 hadro production.

Language

English

Source (journal)

Physical review letters. - New York, N.Y., 1958, currens

Publication

New York, N.Y. : American Physical Society , 2007

ISSN

0031-9007 [print]

1079-7114 [online]

Volume/pages

98 :23 (2007) , p. 232001,1-232001,7

ISI