Measurement of the neutral current coupling constants in neutrino and antineutrino interactions with deuterium

• Published in: Physics letters. B 1983, Vol.133 (1), p.129-134
• Main Authors: Allasia, D., Angelini, C., Baldini, A., Baldo-Ceolin, M., Barlag, S., Bertanza, L., Bigi, A., Bisi, V., Bobisut, F., Bolognese, T., Borg, A., Calimani, E., Capiluppi, P., Casali, R., Ciampolillo, S., Derkaoui, J., Faccini-Turluer, M.L., Fantechi, R., Flaminio, V., Frodesen, A.G., Gamba, D., Giacomelli, G., Halsteinslid, A., Hornaes, A., Huzita, H., Jongejans, B., Lippi, I., Loreti, M., Louedec, C., Mandrioli, G., Marzari-Chiesa, A., Nappi, A., Pazzi, R., Pierazzini, G.M., Riccati, L., Romero, A., Rossi, A.M., Serra-Lugaresi, P., Tenner, A., van Apeldoorn, G.W., van Dam, P., Vignaud, D., Visser, C., Wigmans, R.
• Format: Article
• Language: English
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(83)90121-1

We have measured neutral and charged current interactions of ν μ and ν μ on proton and neutron. From a combination of ratios we determine the neutral current chiral coupling constants. The results are u 2 L = 0.13 ± 0.03, d 2 L = 0.19 ± 0.03, u 2 R = 0.02 ± 0.02 and d 2 R = 0.00 ± 0.02. These results agree with the predictions of the standard SU(2) × U(1) model. The corresponding value of sin 2 θ W is 0.20 ± 0.04.