Pion pair production in photon-photon collisions at DCI

This paper presents experimental results on π +π − production threshold from the collision of quasi-real photons. The data, obtained at the e +e − collider DCI, are a combination of the results from the DM1 and DM2 experiments. Using the e +e − and π +π − production for normalization and cross-check...

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Bibliographic Details
Published in:Physics letters. B 1987-08, Vol.194 (4), p.573-578
Main Authors: Ajaltouni, Z., Falvard, A., Jousset, J., Michel, B., Montret, J.C., Mutter, Ph, Pallin, D., Courau, A., Augustin, J.E., Cordier, A., Cosme, G., Couchot, F., Delcourt, B., Dudelzak, B., Fulda, F., Grelaud, B., Grosdidier, G., Haissinski, J., Jean-Marie, B., Jullian, S., Lalanne, D., Lepeltier, V., Mane, F., Paulot, C., Riskalla, R., Roy, Ph, Rumpf, F., Szklarz, G., Baldini, R., Calcaterra, S., Capon, G., Bisello, D., Busetto, G., Pescara, L., Sartori, P., Stanco, L.
Format: Article
Language:English
Subjects:
High Energy Physics - Experiment
Physics
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Summary:This paper presents experimental results on π +π − production threshold from the collision of quasi-real photons. The data, obtained at the e +e − collider DCI, are a combination of the results from the DM1 and DM2 experiments. Using the e +e − and π +π − production for normalization and cross-checks, we observe a pion pair yield at low invariant mass ( W < 500 MeV/ c 2) which is approximately twice the one expected from Born terms.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(87)90237-1