| Главная страница > A study of the semi-leptonic decays of K/sup +/ mesons |
| Article | |
| Title | A study of the semi-leptonic decays of K/sup +/ mesons |
| Author(s) | Braun, H ; Bertrand, D ; Cornelssen, M ; Csejthey-Barth, Monique ; Cundy, Donald C ; Erriquez, O ; Lemonne, J ; Martyn, H U ; Natali, S ; Pedersen, T I ; Renton, P B ; Romano, F ; Vilain, P ; Waldren, D |
| Affiliation | (TH, Aachen, West Germany) |
| Publication | 1975 |
| In: | Nucl. Phys. B 89 (1975) 210-52 |
| DOI | 10.1016/0550-3213(75)90094-2 |
| Subject category | Particle Physics - Phenomenology |
| Abstract | The form factors of the semi-leptonic decays K/sup +/ to pi /sup 0/e /sup +/ nu and K/sup +/ to pi /sup 0/ mu /sup +/ nu have been investigated using a sample of events detected in the CERN 1.1 m/sup 3 / heavy liquid bubble chamber. Analyses have been carried out using methods independent of any assumption of the q/sup 2/ dependence of the form factors in addition to the usual linear parametrizations. Consistent results have been obtained from separate studies of both Dalitz plot density distributions and the branching ratio. A parametrized global analysis of both decay modes gives the values xi (0)=-1.3+or-0.7 and xi (4.4M/sub pi //sup 2/)=-0.45+or-0.13, or lambda /sub 0/=-0.017+or-0.011 both for a fitted value of lambda /sub + /=0.025+or-0.007. (56 refs). |