Theory Aspects of Double-Spin Asymmetries in Proton-Nucleon Collisions
نویسنده
چکیده
The study of two spin asymmetries in hadron-hadron collisions probes the details of fundamental particle interactions in ways infeasible to machines with unpolarized collisions. Within reach is how the proton spin is distributed among its constituents through ∆G and ∆q̄. Measuring couplings, furthering our understanding jet structure and uncovering new physics are all among the possibilities available at polarized colliders. Spin physics may also deepen our understanding of higher twist behavior and the transition between perturbative and nonperturbative physics. An overview of the double spin physics is presented in this report.
منابع مشابه
Spin physics with STAR
The STAR collaboration aims to study polarized proton-proton collisions at RHIC. The emphasis of the spin run this year is on transverse single spin asymmetries. Beyond 2001, we aim to determine directly and precisely the gluon polarization, as well as the polarizations of the u, ū, d and d̄ quarks in the proton by measuring in addition longitudinal and double spin asymmetries. Furthermore, we a...
متن کاملA ug 2 00 6 STAR results on longitudinal spin dynamics
We present preliminary results on the double longitudinal spin asymmetries A LL in inclusive jet production and the longitudinal spin transfer asymmetries D LL in inclusive Λ and ¯ Λ hyperon production. The data amount to 0.5 pb −1 collected at RHIC in 2003 and 2004 with beam polarizations up to 45%. The jet A LL asymmetries, measured over 5 < p T < 17 GeV/c, are consistent with evaluations bas...
متن کاملCollisions at Rhic
We study the production of W and Z gauge bosons in proton-proton and proton-neutron collisions up to a center-of-mass energy √ s = 0.5 TeV , in connection with the realistic possibility of having proton-deuteron collisions at RHIC with a high luminosity. We stress the importance of measuring unpolarized cross sections for a better determination of the flavor asymmetry of the sea quarks. Since p...
متن کامل39 3 v 1 2 1 A ug 1 99 6 August 1996 DESY 96 – 128 INFNCA – TH 9616 hep – ph 9608 xxx On the Physics Potential of Polarized Nucleon – Nucleon Collisions at HERA 1
The physics of polarized nucleon–nucleon collisions originating from an internal polarized target in the HERA proton beam is investigated. Based on 240 pb integrated luminosity at 40 GeV c.m. energy, statistical sensitivities are given over a wide (xF , pT )–range for a variety of inclusive and exclusive final states. By measuring single spin asymmetries unique information can be obtained on hi...
متن کاملSummary of Physics Prospects for Polarized Nucleon - Nucleon Scattering at HERA - ~ N ⋆
The physics scope of polarized nucleon–nucleon collisions originating from an internal polarized target in the HERA proton beam is summarized. Based on 240 pb −1 integrated luminosity at 40 GeV c.m. energy, statistical sensitivities are given over a wide (x F , p T)–range for a variety of inclusive and exclusive final states. By measuring single spin asymmetries unique information can be obtain...
متن کامل