Measurement of the angular distribution in anti-p p ---> psi(2S) ---> e+ e- Page: 1 of 10
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At Fermilab FERMILAB-PUB-05-012-E JANUARY 2005
Measurement of the angular distribution in
pp - 0(2S) - e+e-
M. Ambrogiani b, M. Andreotti b, S. Argiro d, S. Bagnasco d,c,
W. Baldini b, D. Bettoni b, G. Borreani d, A. Buzzo c,
R. Calabrese b, R. Cester d, G. Cibinetto b, P. Dalpiaz b,
X. Fan e, G. Garzoglio c,a, K. E. Gollwitzer f,a, M. Graham g,
A. Hahn a, M. Hu a, S. Jin e, D. Joffe e, J. Kasper e, G. Lasiof,
M. Lo Vetere c, E. Luppi b, P. Maas e, M. Macri c,
M. Mandelkern f, F. Marchetto d, M. Marinelli c, W. Marsh a,
M. Martini b, E. Menichetti d, Z. Metreveli e, R. Mussa d,
M. Negrini b, M. M. Obertino d,g M. Pallavicini c, N. Pastrone d,
C. Patrignani c,* , T. K. Pedlar e, S. Pordes a, E. Robutti c,
W. Roethelf, J. Rosene, P. Rumerioe, R. Rusackg,
A. Santroni c, J. Schultz f, S. H. Seo g, K. K. Seth e,
G. Stancari b,a, M. Stancarif,b, J. Streets a, A. Tomaradze e,
I. Uman e, T. Vidnovic IIjg, S. Werkema a, G. Zioulas f,
P. Zweber e
a Fermi National Accelerator Laboratory, Batavia, Illinois 60510
blstituto Nazionale di Fisica Nucleare and University of Ferrara, 44100, Italy
cIstituto Nazionale di Fisica Nucleare and University of Genoa, 16146, Italy
dlstituto Nazionale di Fisica Nucleare and University of Torino, 10125, Italy
'Northwestern University, Evanston, Illinois, 60208
f University of California at Irvine, California 92697
9 University of Minnesota, Minneapolis, Minnesota, 55455
Fermilab E835 Collaboration
Abstract
We present the first measurement of the angular distribution for the exclusive pro-
cess pp - 0(2S) e+e- based on a sample of 6844 events collected by the Fermilab
E835 experiment. We find that the angular distribution is well described by the ex-
pected functional form d oc* 1 + A cos2 0*, where 0* is the angle between thePreprint submitted to Elsevier Science
12 January 2005
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Ambrogiani, M.; Andreotti, M.; Argiro, S.; Bagnasco, S.; Baldini, W.; Bettoni, D. et al. Measurement of the angular distribution in anti-p p ---> psi(2S) ---> e+ e-, article, December 1, 2004; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1406092/m1/1/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.