Do we understand the single-spin asymmetry for $pi^0$ inclusive production in pp collisions?
| dc.creator | Bourrely, Claude | |
| dc.creator | Soffer, Jacques | |
| dc.date | 2003-11-09 | |
| dc.date | 2004-05-28 | |
| dc.date.accessioned | 2026-07-07T11:31:31Z | |
| dc.date.available | 2026-07-07T11:31:31Z | |
| dc.description | The cross section data for $π^0$ inclusive production in $pp$ collisions is considered in a rather broad kinematic region in energy $\sqrt{s}$, Feynman variable $x_F$ and transverse momentum $p_T$. The analysis of these data is done in the perturbative QCD framework at the next-to-leading order. We find that they cannot be correctly described in the entire kinematic domain and this leads us to conclude that the single-spin asymmetry, $A_N$ for this process, observed several years ago at FNAL by the experiment E704 and the recent result obtained at BNL-RHIC by STAR, are two different phenomena. This suggests that STAR data probes a genuine leading-twist QCD single-spin asymmetry for the first time and finds a large effect. | |
| dc.description | text modified, version to be published in Eur. Phys. J. C, 6 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0311110 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0311110 | |
| dc.identifier | Eur.Phys.J.C36:371-374,2004 | |
| dc.identifier | doi:10.1140/epjc/s2004-01956-4 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/197292 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Do we understand the single-spin asymmetry for $pi^0$ inclusive production in pp collisions? | |
| dc.type | text |