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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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(+).

Název v anglickém jazyce

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

Popis výsledku anglicky

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(+).

Druh

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

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

<a href="/cs/project/LG14033" target="_blank" >LG14033: Česká spolupráce na projektech H1 a CALICE</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

—

Svazek periodika

76

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

21

Strana od-do

—

Kód UT WoS článku

000370646800001

EID výsledku v databázi Scopus

2-s2.0-84955478269