Large transverse momentum particle production in αα and pp collisions at the CERN ISR

• Published in: Nuclear physics. B Vol. 209; no. 2; pp. 309 - 320
• Main Authors: Åkesson, T., Albrow, M.G., Almehed, S., Benary, O., Bøggild, H., Botner, O., Brody, H., Burkert, V., Di Ciaccio, A., Cockerill, D., Dagan, S., Dahl-Jensen, E., Dahl-Jensen, I., Damgaard, G., Evans, W.M., Fabjan, C.W., Frandsen, P., Frankel, S., Frati, W., Gordon, H., Hallgren, A., Hansen, K.H., Heck, B., Hilke, H.J., Hooper, J.E., Jarlskog, G., Jeffreys, P., Kesseler, G., Killian, T., Lans, J.v.d., Lissauer, D., Lörstad, B., Ludlam, T., McCubbin, N.A., Melin, A., Mjornmark, U., Møller, R., Molzon, W., Nielsen, B.S., Nilsson, A., Olsen, L.H., Oren, Y., Rosselet, L., Rosso, E., Rudge, A., Schindler, R.H., Schistad, B., Willis, W.J., Winik, M., Witzeling, W., Wood, M., Woody, C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 27.12.1982
• ISSN: 0550-3213; 1873-1562
• DOI: 10.1016/0550-3213(82)90258-9

The production of charged hadrons with high p T in αα collisions at √ s=126 GeV and pp collisions at √ s=31 and 63 GeV is compared, and the structure of the events associated with the high- pT particles is studied. The probability of finding associated particles close to the trigger particle increases strongly between √ s=31 and 63 GeV for pp collisions. For p T>2.5GeV/ c the αα/pp cross section ratio at the same energy per nucleon is measured to be 18.7 ± 2.0, to be compared with A 2 = 16, and a higher associated multiplicity is observed for αα.