Measurement of the Upsilon Production Cross Section in 920 GeV Fixed-Target Proton-Nucleus Collisions
| dc.creator | B Collaboration | |
| dc.creator | Abt, I. | |
| dc.date | 2006-03-08 | |
| dc.date.accessioned | 2026-07-07T10:28:36Z | |
| dc.date.available | 2026-07-07T10:28:36Z | |
| dc.description | The proton-nucleon cross section ratio $R=Br(Υ\to l^+l^-) dσ(Υ)/dy|_{y=0} / {σ(J/ψ)}$ has been measured with the HERA-B spectrometer in fixed-target proton-nucleus collisions at 920 GeV proton beam energy corresponding to a proton-nucleon cms energy of sqrt{s}=41.6 GeV. The combined results for the Upsilon decay channels Upsilon $\to e^+e^-$ and Upsilon $\toμ^+μ^-$ yield a ratio $R=(9.0 \pm 2.1) 10^{-6}$. The corresponding Upsilon production cross section per nucleon at mid-rapidity (y=0) has been determined to be $Br(Υ\to{}l^+l^-) {dσ(Υ)/dy}|_{y=0}= 4.5 \pm 1.1 $ pb/nucleon. | |
| dc.description | 17 pages, 7 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0603015 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0603015 | |
| dc.identifier | Phys.Lett.B638:13-21,2006 | |
| dc.identifier | doi:10.1016/j.physletb.2006.04.042 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177506 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the Upsilon Production Cross Section in 920 GeV Fixed-Target Proton-Nucleus Collisions | |
| dc.type | text |