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Measurement of the gluon structure function from direct photon data at the CERN p collider

Authors :
S. Grünendahl
Francesca Nessi-Tedaldi
A. Cravero
Julius Hrivnac
C. Onions
Steinar Stapnes
P. Petroff
V. Sondermann
R. S. DeWolf
P. Bonamy
R. Spiwoks
S. L. Singh
Klaus Peter Pretzl
L. Müller
Gary F. Egan
M. Curatolo
G. Unal
Michel Lefebvre
M. Bourliaud
Paola Scampoli
Marco Fraternali
D. J. Munday
H. Zaccone
Laura Perini
Marzio Nessi
Giovanna Ambrosini
Adele Rimoldi
Michael Andrew Parker
L. Mandelli
B. Esposito
M. Pepe
Darien Wood
J.-M. Gaillard
D. Buskulic
K. Jacobs
V. G. Goggi
J. Schacher
Giacomo Polesello
J. P. Repellin
F. Tondini
S. N. Tovey
E. Tsesmelis
P. Lubrano
L. Linssen
J.M. Pentney
P. Bareyre
Andrea Dell'Acqua
P. S. Wells
E. Iacopini
J-P. Meyer
Chariclia Petridou
D. Cavalli
H. Hufnagel
H. Plothow-Besch
S. Lami
E. Hugentobler
Giovanni Carboni
Andrea Federspiel
N. Kurz
A. R. Weidberg
Vincenzo Cavasinni
S. A. Wotton
K. Hultqvist
Paolo Lariccia
K. Hara
M. Primavera
M. Valdata-Nappi
Y. Ducros
L. DiLella
F. Pastore
M. Punturo
A. Zylberstejn
Sten Hellman
Peter Jenni
J. Alitti
Marcello Mazzanti
K. Borer
R. Ansari
Roberto Ferrari
Massimiliano F. Sacchi
C. Conta
J. C. Chollet
G. Blaylock
B. Merkel
P. Cenci
Luca Cozzi
Louis Fayard
I.A. Bertram
E. Pennacchio
Alan Poppleton
Daniel Froidevaux
Kevin Einsweiler
K. Meier
Livio Mapelli
Cinzia Talamonti
L. Malgeri
T. Pal
D. Autiero
T. DelPrete
G. Parrour
Claus Gössling
T. O. White
V. Simak
Valerio Vercesi
F. Gianotti
C. Magneville
Michele Livan
B. Schmidt
F. Costantini
E. E. Kluge
M. Morganti
O. Gildemeister
G. Fumagalli
G. Costa
M. Moniez
J. Incandela
R. Moning
Source :
Physics Letters B. 299:174-182
Publication Year :
1993
Publisher :
Elsevier BV, 1993.

Abstract

A measurement of the gluon structure fusion using direct photon events observed with the UA2 detector in p p collisions at √ s =630 GeV is presented. The x -range covered by this analysis is between 0.049 and 0.207 and the Q 2 range is between 280 GeV 2 and 3670 GeV 2 . The data sample corresponds to an integrated luminosity of 7.14 pb −1 . The results are found to be in good agreement with the gluon distributions measured in deep inelastic scattering experiments extrapolated to the UA2 Q 2 values.

Details

ISSN :
03702693
Volume :
299
Database :
OpenAIRE
Journal :
Physics Letters B
Accession number :
edsair.doi...........00a334ca08a428364990c65d65c39d63