Test of QCD and a measurement of Λ from scaling violations in the nucleon structure function F2( x, Q2)

• Published in: Physics letters. B 1987-08, Vol.195 (1), p.97-101
• Main Authors: Benvenuti, A.C., Bollini, D., Bruni, G., Monari, L., Navarria, F.L., Argento, A., Cvach, J., Lohmann, W., Piemontese, L., Todorova, G., Akhundov, A.A., Genchev, V.I., Krivokhizhin, V.G., Kukhtin, V.V., Kurlovich, S.P., Nemec̆ek, S., Reimer, P., Sanadze, V.V., Savin, I.A., Sidorov, A.V., Skachkov, N.B., Smirnov, G.I., Sultanov, G., Todorov, P., Volodko, A.G., Jamnik, D., Kopp, R., Meyer-Berkhout, U., Staude, A., Teichert, K.-M., Tirler, R., Voss, R., Zupanc̆ic̆, C̆., Feltesse, J., Milsztajn, A., Ouraou, A., Renardy, J.F., Rich-Hennion, P., Sacquin, Y., Smadja, G., Verrecchia, P., Virchaux, M.
• Format: Article
• Language: English
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(87)90892-6

Scaling violations in the nucleon structure function F 2( x, Q 2) measured with high statistics in deep inelastic scattering of muons on a carbon target are compared to predictions of perturbative QCD. Excellent agreement is observed with numerical solutions of the Altarelli-Parisi evolution equations over the entire x and Q 2 range of data. In a next-to-leading order nonsinglet approximation, the QCD mass scale parameter Λ MS is determined to be 230±20(stat.)±60(syst.) MeV. A singlet to the data favours a soft gluon distribution.