Transverse single spin asymmetries of forward neutrons in p plus p, p plus Al, and p plus Au collisions at root S-NN=200 GeV as a function of transverse and longitudinal momenta

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10442393" target="_blank" >RIV/00216208:11320/22:10442393 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=5WjFTtE-up" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=5WjFTtE-up</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.105.032004" target="_blank" >10.1103/PhysRevD.105.032004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Transverse single spin asymmetries of forward neutrons in p plus p, p plus Al, and p plus Au collisions at root S-NN=200 GeV as a function of transverse and longitudinal momenta

Popis výsledku v původním jazyce

In 2015 the PHENIX collaboration at the Relativistic Heavy Ion Collider recorded p + p, p + Al, and p + Au collision data at center of mass energies of root S-NN = 200 GeV with the proton beam(s) transversely polarized. At very forward rapidities eta &gt; 6.8 relative to the polarized proton beam, neutrons were detected either inclusively or in (anti)correlation with detector activity related to hard collisions. The resulting single spin asymmetries, that were previously reported, have now been extracted as a function of the transverse momentum of the neutron as well as its longitudinal momentum fraction x(F). The explicit kinematic dependence, combined with the correlation information allows for a closer look at the interplay of different mechanisms suggested to describe these asymmetries, such as hadronic interactions or electromagnetic interactions in ultraperipheral collisions, UPC. Events that are correlated with a hard collision indeed display a mostly negative asymmetry that increases in magnitude as a function of transverse momentum with only little dependence on x(F). In contrast, events that are not likely to have emerged from a hard collision display positive asymmetries for the nuclear collisions with a kinematic dependence that resembles that of a UPC based model. Because the UPC interaction depends strongly on the charge of the nucleus, those effects are very small for p + p collisions, moderate for p + Al collisions, and large for p + Au collisions.

Název v anglickém jazyce

Transverse single spin asymmetries of forward neutrons in p plus p, p plus Al, and p plus Au collisions at root S-NN=200 GeV as a function of transverse and longitudinal momenta

Popis výsledku anglicky

In 2015 the PHENIX collaboration at the Relativistic Heavy Ion Collider recorded p + p, p + Al, and p + Au collision data at center of mass energies of root S-NN = 200 GeV with the proton beam(s) transversely polarized. At very forward rapidities eta &gt; 6.8 relative to the polarized proton beam, neutrons were detected either inclusively or in (anti)correlation with detector activity related to hard collisions. The resulting single spin asymmetries, that were previously reported, have now been extracted as a function of the transverse momentum of the neutron as well as its longitudinal momentum fraction x(F). The explicit kinematic dependence, combined with the correlation information allows for a closer look at the interplay of different mechanisms suggested to describe these asymmetries, such as hadronic interactions or electromagnetic interactions in ultraperipheral collisions, UPC. Events that are correlated with a hard collision indeed display a mostly negative asymmetry that increases in magnitude as a function of transverse momentum with only little dependence on x(F). In contrast, events that are not likely to have emerged from a hard collision display positive asymmetries for the nuclear collisions with a kinematic dependence that resembles that of a UPC based model. Because the UPC interaction depends strongly on the charge of the nucleus, those effects are very small for p + p collisions, moderate for p + Al collisions, and large for p + Au collisions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/LM2018109" target="_blank" >LM2018109: Brookhavenská národní laboratoř - účast České republiky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

105

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

032004

Kód UT WoS článku

000761217300001

EID výsledku v databázi Scopus

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