Single spin asymmetry AN in polarized proton-proton elastic scattering at root s=200 GeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F13%3A00206038" target="_blank" >RIV/68407700:21340/13:00206038 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/13:00391548

Výsledek na webu

<a href="http://arxiv.org/pdf/1206.1928.pdf" target="_blank" >http://arxiv.org/pdf/1206.1928.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2013.01.014" target="_blank" >10.1016/j.physletb.2013.01.014</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Single spin asymmetry AN in polarized proton-proton elastic scattering at root s=200 GeV

Popis výsledku v původním jazyce

We report a high precision measurement of the transverse single spin asymmetry A(N) at the center of mass energy root s = 200 GeV in elastic proton-proton scattering by the STAR experiment at RHIC. The A(N) was measured in the four-momentum transfer squared t range 0.003 <= vertical bar t vertical bar <= 0.035 (GeV/c)(2), the region of a significant interference between the electromagnetic and hadronic scattering amplitudes. The measured values of A(N) and its t-dependence are consistent with a vanishing hadronic spin-flip amplitude, thus providing strong constraints on the ratio of the single spin-flip to the non-flip amplitudes. Since the hadronic amplitude is dominated by the Pomeron amplitude at this root s, we conclude that this measurement addresses the question about the presence of a hadronic spin flip due to the Pomeron exchange in polarized proton-proton elastic scattering.

Název v anglickém jazyce

Single spin asymmetry AN in polarized proton-proton elastic scattering at root s=200 GeV

Popis výsledku anglicky

We report a high precision measurement of the transverse single spin asymmetry A(N) at the center of mass energy root s = 200 GeV in elastic proton-proton scattering by the STAR experiment at RHIC. The A(N) was measured in the four-momentum transfer squared t range 0.003 <= vertical bar t vertical bar <= 0.035 (GeV/c)(2), the region of a significant interference between the electromagnetic and hadronic scattering amplitudes. The measured values of A(N) and its t-dependence are consistent with a vanishing hadronic spin-flip amplitude, thus providing strong constraints on the ratio of the single spin-flip to the non-flip amplitudes. Since the hadronic amplitude is dominated by the Pomeron amplitude at this root s, we conclude that this measurement addresses the question about the presence of a hadronic spin flip due to the Pomeron exchange in polarized proton-proton elastic scattering.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

—

Projekt

<a href="/cs/project/LA09013" target="_blank" >LA09013: Účast ČR v experimentu STAR v laboratoři BNL, USA</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physics Letters B

ISSN

0370-2693

e-ISSN

—

Svazek periodika

719

Číslo periodika v rámci svazku

1-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

62-69

Kód UT WoS článku

000315065600008

EID výsledku v databázi Scopus

—