Scaling violation favouring high multiplicity events at 540 GeV CMS energy

• Published in: Physics letters. B Vol. 138; no. 4; pp. 304 - 310
• Main Authors: Alner, G.J., Alpgård, K., Ansorge, R.E., Åsman, B., Böckmann, K., Booth, C.N., Burow, L., Carlson, P., Chevalley, J.-L., DeClercq, C., DeWolf, R.S., Eckart, B., Ekspong, G., Evangelou, I., Eyring, A., Fabre, J.-P., French, K.A., Gaudaen, J., Geich-Gimbel, C., Gijsen, M., von Holt, K., Hospes, R., Johnson, D., Jon-And, K., Kokott, Th, Mackenzi, R., Maggs, M.N., Meinke, R., Müller, Th, Munday, D.J., Ovens, J.E.V., Rushbrooke, J.G., Saarikko, H., Saarikko, T., Triantis, F., Walck, Ch, Ward, C.P., Ward, D.R., White, T.O., Wilquet, G., Yamdagni, N.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.1984
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(84)91666-6

New data are presented on the charged multiplicity distribution for non single-diffractive events produced in pp̄ interactions at a CM energy s = 540 GeV . The distribution in the full pseudorapidity range is compared with data from the ISR. Using the scaling variable z = n 〈n〉 a change of shape is observed. The effect is manifested as an increase from 2% to 6% in the proportion of high multiplicity ( z > 2) events. For the central pseudorapidity range, | η| ⪅ 1.5, scaling is approximately valid up to s = 540 GeV .