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3 results on '"pseudoscalar mixing angle"'

1. Measurement of the pseudoscalar mixing angle and gluonium content with the KLOE detector

Author

Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Beltrame, P., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocchetta, S., Bocci, V., Bossi, F., Bowring, D., Branchini, P., Caloi, R., Campana, P., Capon, G., Capussela, T., Ceradini, F., and Chi, S.

Subjects
*DETECTORS, *PHYSICS instruments, *PARTICLES (Nuclear physics), *MESONS
Abstract

Abstract: We have measured the ratio by looking for the radiative decays and into the final states and 7γ, respectively, in a sample of ϕ mesons produced at the Frascati ϕ factory. We obtain , from which we derive . Assuming the has zero gluonium content, we extract the pseudoscalar mixing angle in the quark-flavor basis, . Combining the value of with other constraints, we estimate the fractional gluonium content of the to be and the mixing angle to be . [Copyright &y& Elsevier]

Published
2007
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2. Measurement of <f>Γ(φ→η′γ)/Γ(φ→ηγ)</f> and the pseudoscalar mixing angle

Subjects
*DECAY schemes (Radioactivity), *PHYSICS
Abstract

We have measured the radiative decays φ→ηγ, φ→η′γ selecting π+π−γγγ final state in a sample of ∼5×107 φ-mesons produced at the Frascati φ-factory DAΦNE. We obtain Γ(φ→η′γ)/Γ(φ→ηγ)=(4.70±0.47±0.31)×10−3. From this result we derive new accurate values for the branching ratio BR(φ→η′γ)=(6.10±0.61±0.43)×10−5 and the mixing angle of pseudoscalar mesons in the flavour basis ϕP=(41.8+1.9−1.6)°. [Copyright &y& Elsevier]

Published
2002
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3. Measurement of the pseudoscalar mixing angle and eta ' gluonium content with the KLOE detector

Author

Enrico Pasqualucci, S. Meola, Massimo Antonelli, G. Saracino, S. Bocchetta, Alessandra Doria, M. Testa, A. Passeri, W. Kluge, S. Giovannella, Margherita Primavera, M. Palutan, P. Franzini, Pierluigi Campana, R. Caloi, Ludovico Pontecorvo, F. Murtas, E. De Lucia, T. Capussela, G. Finocchiaro, D. Leone, T. Spadaro, G. De Zorzi, G. Lanfranchi, S. Chi, F. Ambrosino, J. Lee-Franzini, A. Antonelli, W. Mei, L. Tortora, D. Bowring, F. Nguyen, Paolo Valente, G. Chiefari, S. Miscetti, C. Di Donato, S. Fiore, G. Venanzoni, F. Perfetto, C. Bacci, Cesare Bini, P. Beltrame, Andrea Ferrari, B. Valeriani, G. Bencivenni, S. Dell'Agnello, E. Graziani, M. L. Ferrer, G. F. Xu, P. Massarotti, Barbara Sciascia, Andrea Ventura, M. Martini, P. Gauzzi, P. Santangelo, Vincenzo Patera, G. Capon, Claudio Gatti, F. Bossi, P. De Simone, G. Felici, M. Incagli, Fabrizio Scuri, E. Santovetti, S. Conetti, A. Denig, V. Bocci, C. Bloise, Edoardo Gorini, P. Branchini, M. Dreucci, Francesco Lacava, S. Müller, S. Bertolucci, A. Sciubba, S. Di Falco, A. Di Domenico, F. Ceradini, B. Di Micco, R. Versaci, Igor Sfiligoi, Stefano Veneziano, P. Ciambrone, C. Forti, M. Napolitano, M. Moulson, A. De Santis, V. V. Kulikov, F., Ambrosino, A., Antonelli, M., Antonelli, C., Bacci, P., Beltrame, G., Bencivenni, S., Bertolucci, C., Bini, C., Bloise, S., Bocchetta, V., Bocci, F., Bossi, D., Bowring, P., Branchini, R., Caloi, P., Campana, G., Capon, T., Capussela, F., Ceradini, S., Chi, G., Chiefari, P., Ciambrone, S., Conetti, E., DE LUCIA, A., DE SANTIS, P., DE SIMONE, G., DE ZORZI, S., DELL AGNELLO, A., Denig, A., DI DOMENICO, C., DI DONATO, S., DI FALCO, B., DI MICCO, A., Doria, M., Dreucci, G., Felici, A., Ferrari, M. L., Ferrer, G., Finocchiaro, S., Fiore, C., Forti, P., Franzini, C., Gatti, P., Gauzzi, S., Giovannella, Gorini, Edoardo, E., Graziani, M., Incagli, W., Kluge, V., Kulikov, F., Lacava, G., Lanfranchi, J., LEE FRANZINI, D., Leone, M., Martini, P., Massarotti, W., Mei, S., Meola, S., Miscetti, M., Moulson, S., Mnuller, F., Murta, M., Napolitano, F., Nguyen, M., Palutan, E., Pasqualucci, A., Passeri, V., Patera, F., Perfetto, L., Pontecorvo, Primavera, Margherita, P., Santangelo, E., Santovetti, G., Saracino, B., Sciascia, A., Sciubba, F., Scuri, I., Sfiligoi, T., Spadaro, M., Testa, L., Tortora, P., Valente, B., Valeriani, G., Venanzoni, S., Veneziano, Ventura, Andrea, R., Versaci, and G., Xu

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Radiative φ decay, Glueball, e(+)e(-), collisions, radiative phi decays, pseudoscalar mixing angle, Electron–positron annihilation, Pseudoscalar mixing angle, Analytical chemistry, e+ e− collision, Settore FIS/04 - Fisica Nucleare e Subnucleare, Pseudoscalar, Content (measure theory), High Energy Physics::Experiment, Nuclear Experiment, Mixing (physics)
Abstract

We have measured the ratio R ϕ = BR ( ϕ → η ′ γ ) / BR ( ϕ → η γ ) by looking for the radiative decays ϕ → η ′ γ and ϕ → η γ into the final states π + π − 7 γ and 7γ, respectively, in a sample of ∼ 1.4 × 10 9 ϕ mesons produced at the Frascati ϕ factory. We obtain R ϕ = ( 4.77 ± 0.09 stat ± 0.19 syst ) × 10 −3 , from which we derive BR ( ϕ → η ′ γ ) = ( 6.20 ± 0.11 stat ± 0.25 syst ) × 10 −5 . Assuming the η ′ has zero gluonium content, we extract the pseudoscalar mixing angle in the quark-flavor basis, φ P = ( 41.4 ± 0.3 stat ± 0.7 syst ± 0.6 th ) ° . Combining the value of R ϕ with other constraints, we estimate the fractional gluonium content of the η ′ to be Z 2 = 0.14 ± 0.04 and the mixing angle to be φ P = ( 39.7 ± 0.7 ) ° .

Published
2007

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