CINECA IRIS Institutional Research Information System

Isolated photons with high transverse energy have been studied in deep inelastic ep scattering with the ZEUS detector at HERA, using an integrated luminosity of 326 pb−1 in the range of exchanged-photon virtuality 10-350 GeV^2. Outgoing isolated photons with transverse energy 4 < ET_γ < 15 GeV and pseudorapidity − 0.7 < η_γ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 < ET_jet < 35 GeV and −1.5 < η_jet < 1.8, respectively. Differential cross sections are presented for the following variables: the fraction of the incoming photon energy and momentum that is transferred to the outgoing photon and the leading jet; the fraction of the incoming proton energy transferred to the photon and leading jet; the differences in azimuthal angle and pseudorapidity between the outgoing photon and the leading jet and between the outgoing photon and the scattered electron. Comparisons are made with theoretical predictions: a leading-logarithm Monte Carlo simulation, a next-to-leading-order QCD prediction, and a prediction using the kT-factorisation approach.

Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

Abramowicz H.;Abt I.;Adamczyk L.;Adamus M.;Aggarwal R.;Antonelli S.;Aushev V.;Aushev Y.;Behnke O.;Behrens U.;Bertolin A.;Bloch I.;Brock I.;Brook N. H.;Brugnera R.;Bruni A.;Bussey P. J.;Caldwell A.;Capua M.;Catterall C. D.;Chwastowski J.;Ciborowski J.;Ciesielski R.;Cooper-Sarkar A. M.;Corradi M.;Dementiev R. K.;Devenish R. C. E.;Dusini S.;Foster B.;Gach G.;Gallo E.;Garfagnini A.;Geiser A.;Gizhko A.;Gladilin L. K.;Golubkov Y. A.;Grzelak G.;Guzik M.;Gwenlan C.;Hlushchenko O.;Hochman D.;Hori R.;Ibrahim Z. A.;Iga Y.;Ishitsuka M.;Jomhari N. Z.;Kadenko I.;Kananov S.;Karshon U.;Kaur P.;Kisielewska D.;Klanner R.;Klein U.;Korzhavina I. A.;Kotanski A.;Kovalchuk N.;Kowalski H.;Krupa B.;Kuprash O.;Kuze M.;Levchenko B. B.;Levy A.;Lisovyi M.;Lobodzinska E.;Lohr B.;Lohrmann E.;Longhin A.;Lukina O. Y.;Malka J.;Mastroberardino A.;Idris F. M.;Nasir N. M.;Myronenko V.;Nagano K.;Onishchuk Y.;Paul E.;Perlanski W.;Pokrovskiy N. S.;Polini A.;Przybycien M.;Ruspa M.;Saxon D. H.;Schioppa M.;Schneekloth U.;Schorner-Sadenius T.;Shcheglova L. M.;Shkola O.;Shyrma Y.;Skillicorn I. O.;Slominski W.;Solano A.;Stanco L.;Stefaniuk N.;Stern A.;Stopa P.;Sztuk-Dambietz J.;Tassi E.;Tokushuku K.;Tomaszewska J.;Tsurugai T.;Turcato M.;Turkot O.;Tymieniecka T.;Verbytskyi A.;Abdullah W. A. T. W.;Wichmann K.;Wing M.;Yamada S.;Yamazaki Y.;Zarnecki A. F.;Zawiejski L.;Zenaiev O.;Zhautykov B. O.

2018-01-01

Abstract

Isolated photons with high transverse energy have been studied in deep inelastic ep scattering with the ZEUS detector at HERA, using an integrated luminosity of 326 pb−1 in the range of exchanged-photon virtuality 10-350 GeV^2. Outgoing isolated photons with transverse energy 4 < ET_γ < 15 GeV and pseudorapidity − 0.7 < η_γ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 < ET_jet < 35 GeV and −1.5 < η_jet < 1.8, respectively. Differential cross sections are presented for the following variables: the fraction of the incoming photon energy and momentum that is transferred to the outgoing photon and the leading jet; the fraction of the incoming proton energy transferred to the photon and leading jet; the differences in azimuthal angle and pseudorapidity between the outgoing photon and the leading jet and between the outgoing photon and the scattered electron. Comparisons are made with theoretical predictions: a leading-logarithm Monte Carlo simulation, a next-to-leading-order QCD prediction, and a prediction using the kT-factorisation approach.

Scheda breve

Scheda completa

Scheda completa (DC)

	Anno
	
			2018
		
	Titolo rivista
	
			JOURNAL OF HIGH ENERGY PHYSICS
		
	N. Volume
	
			2018
		
	Fascicolo
	
			1:032
		
	Pagine (da)
	
			1
		
	Pagine (a)
	
			30
		
	DOI
	
			https://dx.doi.org/10.1007/JHEP01(2018)032
		
	URL del prodotto (archivi open access, fulltext su sito editore, etc.)
	
			http://dx.doi.org/10.1007/JHEP01(2018)032
		
	Parole Chiave
	
			HERA, ZEUS, Lepton-Nucleon Scattering (experiments); Photon production; QCD
		
	Tutti gli autori
	
			Abramowicz H.; Abt I.; Adamczyk L.; Adamus M.; Aggarwal R.; Antonelli S.; Aushev V.; Aushev Y.; Behnke O.; Behrens U.; Bertolin A.; Bloch I.; Brock I.; Brook N.H.; Brugnera R.; Bruni A.; Bussey P.J.; Caldwell A.; Capua M.; Catterall C.D.; Chwastowski J.; Ciborowski J.; Ciesielski R.; Cooper-Sarkar A.M.; Corradi M.; Dementiev R.K.; Devenish R.C.E.; Dusini S.; Foster B.; Gach G.; Gallo E.; Garfagnini A.; Geiser A.; Gizhko A.; Gladilin L.K.; Golubkov Y.A.; Grzelak G.; Guzik M.; Gwenlan C.; Hlushchenko O.; Hochman D.; Hori R.; Ibrahim Z.A.; Iga Y.; Ishitsuka M.; Jomhari N.Z.; Kadenko I.; Kananov S.; Karshon U.; Kaur P.; Kisielewska D.; Klanner R.; Klein U.; Korzhavina I.A.; Kotanski A.; Kovalchuk N.; Kowalski H.; Krupa B.; Kuprash O.; Kuze M.; Levchenko B.B.; Levy A.; Lisovyi M.; Lobodzinska E.; Lohr B.; Lohrmann E.; Longhin A.; Lukina O.Y.; Malka J.; Mastroberardino A.; Idris F.M.; Nasir N.M.; Myronenko V.; Nagano K.; Onishchuk Y.; Paul E.; Perlanski W.; Pokrovskiy N.S.; Polini A.; Przybycien M.; Ruspa M.; Saxon D.H.; Schioppa M.; Schneekloth U.; Schorner-Sadenius T.; Shcheglova L.M.; Shkola O.; Shyrma Y.; Skillicorn I.O.; Slominski W.; Solano A.; Stanco L.; Stefaniuk N.; Stern A.; Stopa P.; Sztuk-Dambietz J.; Tassi E.; Tokushuku K.; Tomaszewska J.; Tsurugai T.; Turcato M.; Turkot O.; Tymieniecka T.; Verbytskyi A.; Abdullah W.A.T.W.; Wichmann K.; Wing M.; Yamada S.; Yamazaki Y.; Zarnecki A.F.; Zawiejski L.; Zenaiev O.; Zhautykov B.O.
		
	Appare nelle tipologie:
	
			03A-Articolo su Rivista

File in questo prodotto:

File	Dimensione	Formato
10.1007:JHEP01(2018)032.pdf Accesso aperto Tipo di file: PDF EDITORIALE Dimensione 1.71 MB Formato Adobe PDF Visualizza/Apri	1.71 MB	Adobe PDF	Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1768688

Citazioni

ND

4

5

social impact