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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10300 - Physical sciences

Project

<a href="/en/project/LM2018109" target="_blank" >LM2018109: Brookhaven National Laboratory - the participation of the Czech Republic</a><br>

Continuities

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

Publication year

2022

Confidentiality

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

Name of the periodical

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Volume of the periodical

105

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

032004

UT code for WoS article

000761217300001

EID of the result in the Scopus database

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