Photon-induced proton knockout from 208Pb

A

The hadronic cross section measurement at KLOE

KLOE uses the radiative return to measure the hadronic cross section e(+)e(-) --> pi(+) pi(-) at DAPhiNE. The emission of one or more hard photons in the initial state (ISR) reduces the collision energy, otherwise fixed at 1020 MeV, and allows to perform an effective scan of the two pions invariant mass squared, s(pi), in the whole s(pi) region 2 from threshold to m.. An extremely accurate knowledge of experimental systematics, background, luminosity and, on the theoretical side, a precise description of initial state radiation are needed to perform a competitive measurement. We present here the status of the analysis of 140 pb(-1) collected in 2001. A preliminary evaluation of the hadronic contribution to a(mu) in the S-pi range between 0.37 GeV2 and 0.93 GeV2 yields a(mu) = 378.4 +/- 0.8(stat) +/- 4.5(syst) +/- 3-0(theo) 3.8(FSR), consistent with the CMD-2 result and confirming the present discrepancy between e(+)e(-) and tau data

KLOE results on phi radiative decays

102We report the results on the radiative decays phi --> eta'gamma, phi --> pi(0)pi(0)gamma and phi --> etapi(0)gamma obtained with the KLOE detector at the DAPhiNE phi-factory, using a sample of similar to 16 pb(-1). The value of the branching ratio for the phi --> eta'gamma decay is related to the s (s) over bar and gluon content of the eta'. A fit to the two-pseudoscalar invariant mass for the pi(0)pi(0)gamma and etapi(0)gamma final states gives the contribution of the direct terms phi --> f(0)gamma, phi --> sigmagamma and phi --> a(0)gamma, allowing us to investigate the nature of these light scalar mesons.nonenoneAloisio A; Ambrosino F; Antonelli A; Antonelli M; Bacci C; Bencivenni G; Bertolucci S; Bini C; Bloise C; Bocci V; Bossi F; Branchini P; Bulychjov SA; Caloi R; Campana P; Capon G; Carboni G; Casarsa M; Casavola V; Cataldi G; Ceradini F; Cervelli F; Cevenini F; Chiefari G; Ciambrone P; Conetti S; De Lucia E; De Simone P; De Zorzi G; Dell'Agnello S; Denig A; Di Domenico A; Di Donato C; Di Falco S; Di Micco B; Doria A; Dreucci M; Erriquez O; Farilla A; Felici G; Ferrari A; Ferrer ML; Finocchiaro G; Forti C; Franceschi A; Franzini P; Datti C; Gauzzi P; Giovannella S; Gorini E; Graziani E; Han SW; Incagli M; Kluge W; Kulikov V; Lacava F; Lanfranchi G; Lee-Franzini J; Leone D; Lu F; Martemianov M; Matsyuk M; Mei W; Merola L; Messi R; Miscetti S; Moulson M; Muller S; Murtas F; Napolitano M; Nedosekin A; Nguyen F; Palutan M; Pasqualucci E; Passalacqua L; Passeri A; Patera V; Petrolo E; Pontecorvo L; Primavera M; Ruggieri F; Santangelo P; Santovetti E; Saracino G; Schamberger RD; Sciascia B; Sciubba A; Scuri F; Sfiligoi I; Sibidanov A; Spadaro T; Spiriti E; Tong GL; Tortora L; Valente P; Valeriani B; Venanzoni C; Veneziano S; Ventura A; Ventura S; Versaci R; Yu CWAloisio, A; Ambrosino, F; Antonelli, A; Antonelli, M; Bacci, C; Bencivenni, G; Bertolucci, S; Bini, C; Bloise, C; Bocci, V; Bossi, F; Branchini, P; Bulychjov, Sa; Caloi, R; Campana, P; Capon, G; Carboni, G; Casarsa, M; Casavola, V; Cataldi, G; Ceradini, F; Cervelli, F; Cevenini, F; Chiefari, G; Ciambrone, P; Conetti, S; De Lucia, E; De Simone, P; De Zorzi, G; Dell'Agnello, S; Denig, A; Di Domenico, A; Di Donato, C; Di Falco, S; Di Micco, B; Doria, A; Dreucci, M; Erriquez, O; Farilla, A; Felici, G; Ferrari, A; Ferrer, Ml; Finocchiaro, G; Forti, C; Franceschi, A; Franzini, P; Datti, C; Gauzzi, P; Giovannella, S; Gorini, E; Graziani, E; Han, Sw; Incagli, M; Kluge, W; Kulikov, V; Lacava, F; Lanfranchi, G; Lee Franzini, J; Leone, D; Lu, F; Martemianov, M; Matsyuk, M; Mei, W; Merola, L; Messi, R; Miscetti, S; Moulson, M; Muller, S; Murtas, F; Napolitano, M; Nedosekin, A; Nguyen, F; Palutan, M; Pasqualucci, E; Passalacqua, L; Passeri, A; Patera, V; Petrolo, E; Pontecorvo, L; Primavera, M; Ruggieri, F; Santangelo, P; Santovetti, E; Saracino, G; Schamberger, Rd; Sciascia, B; Sciubba, A; Scuri, Fabrizio; Sfiligoi, I; Sibidanov, A; Spadaro, T; Spiriti, E; Tong, Gl; Tortora, L; Valente, P; Valeriani, B; Venanzoni, C; Veneziano, S; Ventura, A; Ventura, S; Versaci, R; Yu, C

Recent results from KLOE at DA Phi NE

100Recent results obtained by the KLOE experiment operating at DAPhiNE, the Frascati phi-factory, are presented. From a sample of about 10(9) phi-mesons produced at DAPhiNE, we select K-L and K-S tagged mesons. We present the preliminary results on the search for K-S --> 3pi(0), the branching ratio of the decay K-S --> pienu, and on the major K-L branching ratios, including the semileptonic decays relevant for the \V-us\ determination. A preliminary measurement of the K-L lifetime, using K-L --> pi(0)pi(0)pi(0) decays, is also given.nonenoneAmbrosino F; Antonelli A; Antonelli M; Bacci C; Barva M; Beltrame P; Bencivenni G; Bertolucci S; Bini C; Bloise C; Bocci V; Bossi F; Bowring D; Branchini P; Bulychjov SA; Caloi R; Campana P; Capon G; Capussela T; Carboni G; Ceradini F; Cervelli F; Chi S; Chiefari G; Ciambrone P; Conetti S; De Lucia E; De Santis A; de Simone P; De Zorzi G; Dell'Agnello S; Denig A; Di Domenico A; Di Donato C; Di Falco S; Di Micco B; Doria A; Dreucci M; Farilla A; Felici G; Ferrari A; Ferrer ML; Finocchiaro G; Forti C; Franzini P; Gatti C; Gauzzi P; Giovannella S; Gorini E; Graziani E; Incagli M; Kluge W; Kulikov V; Lacava F; Lanfranchi G; Lee-Franzini J; Leone D; Martemianov M; Martini M; Massarotti P; Matsyuk M; Mei W; Meola S; Messi R; Miscetti S; Moulson M; Muller S; Murtas F; Napolitano M; Nguyen F; Palutan M; Pasqualucci E; Passalacqua L; Passeri A; Patera V; Perfetto F; Pontecorvo L; Primavera M; Santangelo P; Santovetti E; Saracino G; Schamberger RD; Sciascia B; Sciubba A; Scuri F; Sfiligoi I; Sibidanov A; Spadaro T; Spiriti E; Tabidze M; Testa M; Tortora L; Valente P; Valeriani B; Venanzoni G; Veneziano S; Ventura A; Versaci R; Villella I; Xu GAmbrosino, F; Antonelli, A; Antonelli, M; Bacci, C; Barva, M; Beltrame, P; Bencivenni, G; Bertolucci, S; Bini, C; Bloise, C; Bocci, V; Bossi, F; Bowring, D; Branchini, P; Bulychjov, Sa; Caloi, R; Campana, P; Capon, G; Capussela, T; Carboni, G; Ceradini, F; Cervelli, F; Chi, S; Chiefari, G; Ciambrone, P; Conetti, S; De Lucia, E; De Santis, A; de Simone, P; De Zorzi, G; Dell'Agnello, S; Denig, A; Di Domenico, A; Di Donato, C; Di Falco, S; Di Micco, B; Doria, A; Dreucci, M; Farilla, A; Felici, G; Ferrari, A; Ferrer, Ml; Finocchiaro, G; Forti, C; Franzini, P; Gatti, C; Gauzzi, P; Giovannella, S; Gorini, E; Graziani, E; Incagli, M; Kluge, W; Kulikov, V; Lacava, F; Lanfranchi, G; Lee Franzini, J; Leone, D; Martemianov, M; Martini, M; Massarotti, P; Matsyuk, M; Mei, W; Meola, S; Messi, R; Miscetti, S; Moulson, M; Muller, S; Murtas, F; Napolitano, M; Nguyen, F; Palutan, M; Pasqualucci, E; Passalacqua, L; Passeri, A; Patera, V; Perfetto, F; Pontecorvo, L; Primavera, M; Santangelo, P; Santovetti, E; Saracino, G; Schamberger, Rd; Sciascia, B; Sciubba, A; Scuri, Fabrizio; Sfiligoi, I; Sibidanov, A; Spadaro, T; Spiriti, E; Tabidze, M; Testa, M; Tortora, L; Valente, P; Valeriani, B; Venanzoni, G; Veneziano, S; Ventura, A; Versaci, R; Villella, I; Xu, G