Exclusive rho(0) meson photoproduction with a leading neutron at HERA

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10333696" target="_blank" >RIV/00216208:11320/16:10333696 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1140/epjc/s10052-015-3863-1" target="_blank" >http://dx.doi.org/10.1140/epjc/s10052-015-3863-1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-015-3863-1" target="_blank" >10.1140/epjc/s10052-015-3863-1</a>

Result language

angličtina

Original language name

Exclusive rho(0) meson photoproduction with a leading neutron at HERA

Original language description

A first measurement is presented of exclusive photoproduction of rho(0) mesons associated with leading neutrons at HERA. The data were taken with the H1 detector in the years 2006 and 2007 at a centre-of-mass energy of root s = 319 GeV and correspond to an integrated luminosity of 1.16 pb(-1). The rho(0) mesons with transverse momenta p(T) < 1 GeV are reconstructed from their decays to charged pions, while leading neutrons carrying a large fraction of the incoming proton momentum, x(L) > 0.35, are detected in the Forward Neutron Calorimeter. The phase space of the measurement is defined by the photon virtuality Q(2) < 2 GeV2, the total energy of the photon-proton system 20 < W-gamma p < 100 GeVand the polar angle of the leading neutron theta(n) < 0.75 mrad. The cross section of the reaction gamma p -> rho(0)n pi(+) is measured as a function of several variables. The data are interpreted in terms of a double peripheral process, involving pion exchange at the proton vertex followed by elastic photoproduction of a rho(0) meson on the virtual pion. In the framework of one-pion-exchange dominance the elastic cross section of photon-pion scattering, sigma(el)(gamma pi(+) -> rho(0)pi(+)), is extracted. The value of this cross section indicates significant absorptive corrections for the exclusive reaction gamma p -> rho(0)n pi(+).

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

—

Project

<a href="/en/project/LG14033" target="_blank" >LG14033: Czech collaboration on the projects H1 and CALICE</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

European Physical Journal C

ISSN

1434-6044

e-ISSN

—

Volume of the periodical

76

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

21

Pages from-to

—

UT code for WoS article

000370646800001

EID of the result in the Scopus database

2-s2.0-84955478269