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2 results on '"Rare η decays"'

1. Observation of the rare decay with the KLOE experiment

Author

Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Balwierz, I., Bencivenni, G., Bini, C., Bloise, C., Bocchetta, S., Bossi, F., Branchini, P., Capon, G., Capussela, T., Ceradini, F., Ciambrone, P., Czerwiński, E., De Lucia, E., De Santis, A., De Simone, P., and De Zorzi, G.

Subjects
*COLLISIONS (Nuclear physics), *PHYSICS experiments, *RADIATION, *NUCLEAR physics, *PARTICLES (Nuclear physics), *COLLISIONS (Physics)
Abstract

Abstract: We report the first observation of the rare decay based on collected by the KLOE experiment at the DAΦNE ϕ-factory. The selection of the final state is fully inclusive of radiation. We have identified events resulting in a branching ratio of . [Copyright &y& Elsevier]

Published
2011
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2. Measurement of the branching ratio and search for a CP violating asymmetry in the decay at KLOE

Author

Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Beltrame, P., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocchetta, S., Bossi, F., Branchini, P., Capon, G., Capussela, T., Ceradini, F., Ciambrone, P., Crucianelli, F., De Lucia, E., De Santis, A., and De Simone, P.

Subjects
*BRANCHING ratios, *PHYSICAL measurements, *CP violation, *SYMMETRY (Physics), *PHYSICS experiments, *MESON factories
Abstract

Abstract: We have studied the decay using about collected by the KLOE experiment at the DAΦNE ϕ-factory. This corresponds to about 72 millions η mesons produced in ϕ radiative decays. We have measured the branching ratio, inclusive of radiative effects, with 4% accuracy: . We have obtained the first measurement of the CP-odd ππ–ee decay planes angular asymmetry, . [Copyright &y& Elsevier]

Published
2009
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