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1. Tests of CPT and Quantum Mechanics: experiment

Author

M. Moulson, A. De Santis, Francesco Lacava, Juliet Lee-Franzini, C. Forti, F. Perfetto, M. Napolitano, M. A. Matsyuk, Andrea Doria, Luca Tortora, V. V. Kulikov, Enrico Pasqualucci, B. Valeriani, F. Cervelli, Ludovico Pontecorvo, M. Testa, G. Lanfranchi, G. Venanzoni, A. Di Domenico, E. De Lucia, M. L. Ferrer, P. De Simone, P. Campana, S. Dell'Agnello, M. Martemianov, Margherita Primavera, Paolo Santangelo, W. Mei, S. Chi, S. Giovannella, F. Murtas, E. Spiriti, L. Passalacqua, D. Leone, P. Massarotti, T. Spadaro, S. Bocchetta, Barbara Sciascia, M. Martini, P. Branchini, M. Dreucci, M. Barva, S. Fiore, F. Nguyen, A. G. Denig, Stefano Veneziano, D. Bowring, E. Graziani, S. Bertolucci, S. Ventura, Claudio Gatti, A. Ventura, R. Messi, G. Chiefari, E. Santovetti, M. Palutan, C. Di Donato, T. Capussela, G. Capon, B. Di Micco, C. Bacci, Cesare Bini, Filippo Ceradini, G. Carboni, S. Conetti, W. Kluge, S. Di Falco, G. Felici, M. Incagli, R. D. Schamberger, P. Beltrame, S. Miscetti, G. Saracino, Fabrizio Scuri, Paolo Ciambrone, F. Ambrosino, M. Antonelli, R. Caloi, S. Meola, G. Finocchiaro, A. Antonelli, A.L. Sibidanov, I. Villella, V. Bocci, M. Tabidze, G. De Zorzi, A. Passeri, P. Gauzzi, R. Versaci, A. Farilla, Igor Sfiligoi, Edoardo Gorini, F. Bossi, G. Xu, C. Bloise, P. Franzini, S. Müller, S. A. Bulychjov, G. Bencivenni, Vincenzo Patera, A. Sciubba, P. Valente, and A. Ferrari

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Quantum decoherence, T-symmetry, CPT symmetry, Quantum mechanics, High Energy Physics::Phenomenology, Quantum interference, Time evolution, High Energy Physics::Experiment, Atomic and Molecular Physics, and Optics, Communication channel
Abstract

Neutral kaons provide one of the systems most sensitive to quantum mechanics and CPT violation. Models predicting quantum mechanics violation, also related to CPT violation, have been tested at the CPLEAR and KLOE experiments. In this report results of CPLEAR obtained by studying the time evolution of single and two entangled kaons are reviewed. New or improved limits on decoherence and CPT violation parameters have been obtained by KLOE studying the quantum interference in the channel ϕ → K S K L → π + π − π + π − . No deviations from the expectations of quantum mechanics and CPT symmetry have been observed.

Published
2007
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2. Measurement of the ratio Γ(K→γγ)/Γ(K→π0π0π0) with the KLOE detector

Author

A. Franceschi, Paolo Santangelo, Pierluigi Campana, D. Leone, A. Nedosekin, F. Murtas, Alessandra Doria, Edoardo Gorini, F. Cevenini, E. Santovetti, L. Passalacqua, F. Perfetto, B. Valeriani, F. Cervelli, G. Finocchiaro, O. Erriquez, Ludovico Pontecorvo, C. Forti, S. Conetti, R. Messi, F. Ruggieri, G. Capon, A. Ferrari, M. Napolitano, M. Martemianov, A. Giannasi, Juliet Lee-Franzini, G. Venanzoni, S. Miscetti, F. Nguyen, Leonardo Merola, S. Dell'Agnello, S. Bertolucci, Massimo Casarsa, P. Valente, V. Bocci, E. Spiriti, Marco Adinolfi, M. Palutan, Addolorata Farilla, M. A. Matsyuk, C. Bloise, Alberto Aloisio, M. L. Ferrer, W. Kluge, S. Giovannella, Giuseppe Pirozzi, G. Saracino, W. Mei, T. Spadaro, M. Moulson, S.A. Bulychjov, Margherita Primavera, F. Bossi, G. De Zorzi, G. Felici, F. Ambrosino, R. D. Schamberger, Massimo Antonelli, T. Capussela, R. Caloi, G. Cataldi, P. De Simone, A. G. Denig, L. Pacciani, G.L. Tong, M. Incagli, V. Casavola, A. Di Domenico, Fabrizio Scuri, G. Chiefari, A. Antonelli, C. Di Donato, G. Carboni, G. Lanfranchi, B. Di Micco, P. Branchini, M. Dreucci, Emilio Petrolo, M. Tabidze, M. Palomba, Barbara Sciascia, Andrea Ventura, Enrico Pasqualucci, F. Lu, A.L. Sibidanov, C. Bacci, Cesare Bini, P. Gauzzi, E. Graziani, A. Passeri, S. Ventura, P. Franzini, Filippo Ceradini, Vincenzo Patera, Francesco Lacava, Paolo Ciambrone, A. Sciubba, S. Müller, V. V. Kulikov, R. Versaci, Igor Sfiligoi, C. Gatti, E. De Lucia, Stefano Veneziano, Luca Tortora, G. Bencivenni, G. Cabibbo, and S. Di Falco

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, Electron–positron annihilation, Detector
Abstract

We have measured the ratio R = Γ ( K L → γγ )/ Γ ( K L → π 0 π 0 π 0 ) using the KLOE detector. From a sample of ∼10 9 φ -mesons produced at DAΦNE, the Frascati φ -factory, we select ∼1.6×10 8 K L -mesons tagged by observing K S → π + π − following the reaction e + e − → φ → K L K S . From this sample we select 27,375 K L → γγ events and obtain R =(2.79±0.02 stat ±0.02 syst )×10 −3 . Using the world average value for BR( K L → π 0 π 0 π 0 ), we obtain BR( K L → γγ )=(5.89±0.07±0.08)×10 −4 where the second error is due to the uncertainty on the π 0 π 0 π 0 branching fraction.

Published
2003
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3. Recent results from the KLOE experiment at DAΦNE

Author

AMBROSINO, FABIO, CAPUSSELA, TIZIANA, CHIEFARI, GIOVANNI, DI DONATO, CAMILLA, MASSAROTTI, PAOLO, MEOLA, SABINO, NAPOLITANO, MARCO, PERFETTO, FRANCESCO, SARACINO, GIULIO, A. Antonelli, M. Antonelli, C. Bacci, M. Barva, P. Beltrame, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, V. Bocci, F. Bossi, D. Bowring, P. Branchini, S. A. Bulychjov, R. Caloi, P. Campana, G. Capon, G. Carboni, F. Ceradini, F. Cervelli, S. Chi, P. Ciambrone, S. Conetti, E. D. Lucia, A. D. Santis, P. d. Simone, G. D. Zorzi, S. Dell'Agnello, A. Denig, A. D. Domenico, S. D. Falco, B. D. Micco, A. Doria, M. Dreucci, A. Farilla, G. Felici, A. Ferrari, M. L. Ferrer, G. Finocchiaro, C. Forti, P. Franzini, C. Gatti, P. Gauzzi, S. Giovannella, E. Gorini, E. Graziani, M. Incagli, W. Kluge, V. Kulikov, F. Lacava, G. Lanfranchi, J. Lee Franzini, D. Leone, M. Martemianov, M. Martini, M. Matsyuk, W. Mei, R. Messi, S. Miscetti, M. Moulson, S. Muller, F. Murtas, F. Nguyen, M. Palutan, E. Pasqualucci, L. Passalacqua, A. Passeri, V. Patera, L. Pontecorvo, M. Primavera, P. Santangelo, E. Santovetti, R. D. Schamberger, B. Sciascia, A. Sciubba, F. Scuri, I. Sfiligoi, A. Sibidanov, T. Spadaro, E. Spiriti, M. Tabidze, M. Testa, L. Tortora, P. Valente, B. Valeriani, G. Venanzoni, S. Veneziano, A. Ventura, R. Versaci, I. Villella, G. Xu, Ambrosino, Fabio, A., Antonelli, M., Antonelli, C., Bacci, M., Barva, P., Beltrame, G., Bencivenni, S., Bertolucci, C., Bini, C., Bloise, V., Bocci, F., Bossi, D., Bowring, P., Branchini, S. A., Bulychjov, R., Caloi, P., Campana, G., Capon, Capussela, Tiziana, G., Carboni, F., Ceradini, F., Cervelli, S., Chi, Chiefari, Giovanni, P., Ciambrone, S., Conetti, E. D., Lucia, A. D., Santi, P. d., Simone, G. D., Zorzi, S., Dell'Agnello, A., Denig, A. D., Domenico, DI DONATO, Camilla, S. D., Falco, B. D., Micco, A., Doria, M., Dreucci, A., Farilla, G., Felici, A., Ferrari, M. L., Ferrer, G., Finocchiaro, C., Forti, P., Franzini, C., Gatti, P., Gauzzi, S., Giovannella, E., Gorini, E., Graziani, M., Incagli, W., Kluge, V., Kulikov, F., Lacava, G., Lanfranchi, J., Lee Franzini, D., Leone, M., Martemianov, M., Martini, Massarotti, Paolo, M., Matsyuk, W., Mei, Meola, Sabino, R., Messi, S., Miscetti, M., Moulson, S., Muller, F., Murta, Napolitano, Marco, F., Nguyen, M., Palutan, E., Pasqualucci, L., Passalacqua, A., Passeri, V., Patera, Perfetto, Francesco, L., Pontecorvo, M., Primavera, P., Santangelo, E., Santovetti, Saracino, Giulio, R. D., Schamberger, B., Sciascia, A., Sciubba, F., Scuri, I., Sfiligoi, A., Sibidanov, T., Spadaro, E., Spiriti, M., Tabidze, M., Testa, L., Tortora, P., Valente, B., Valeriani, G., Venanzoni, S., Veneziano, A., Ventura, R., Versaci, I., Villella, and G., Xu

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Hadronic cross-section, Kaon decay, Branching fraction, KLOE, Hadron, General Physics and Astronomy, Astronomy and Astrophysics, Radiation
Abstract

The KLOE experiment at DAΦNE has collected data for an integrated luminosity of ~ 1.3 fb-1 from e+e- collisions at center-of-mass energy around the ϕ-meson peak, W ~1.02 GeV . A selection of results obtained from a sample of 450 pb-1 of data acquired during year 2001 and 2002 is presented. Studying tagged KS and KL-mesons produced in the reaction e+e-→ϕ→KS KL we measured the branching ratio of the decay KS→πeν, the upper limit on the decay KS→π0π0π0, and the main KL decay branching ratios. Exploiting the initial state radiation in the reaction e+e-→π+π-γ, we extracted the hadronic cross-section as a function of the squared center-of-mass energy sπ of the π π system, in the range 0.35 < sπ < 0.95 GeV 2.

Published
2005

4. KLOE results on Phi radiative decays

Author

M. Adinolfi, A. Antonelli, M. Antonelli, C. Bacci, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, V. Bocci, F. Bossi, P. Branchini, S. A. Bulychjov, G. Cabibbo, R. Caloi, P. Campana, G. Capon, G. Carboni, M. Casarsa, V. Casavola, G. Cataldi, F. Ceradini, F. Cervelli, F. Cevenini, P. Ciambrone, S. Conetti, E. De Lucia, P. De Simone, G. De Zorzi, S. Dell'Agnello, A. Denig, A. Di Domenico, S. Di Falco, B. Di Micco, A. Doria, M. Dreucci, O. Erriquez, A. Farilla, G. Felici, A. Ferrari, M. L. Ferrer, G. Finocchiaro, C. Forti, A. Franceschi, P. Franzini, C. Gatti, P. Gauzzi, A. Giannasi, S. Giovannella, E. Gorini, E. Graziani, M. Incagli, W. Kluge, V. Kulikov, F. Lacava, G. Lanfranchi, J. Lee Franzini, D. Leone, F. Luc, M. Martemianov, M. Matsyuk, W. Mei, R. Messi, S. Miscetti, M. Moulson, S. Müller, F. Murtas, A. Nedosekin, F. Nguyen, M. Palomba, L. Pacciani, M. Palutan, E. Pasqualucci, L. Passalacqua, A. Passeri, V. Patera, E. Petrolo, G. Pirozzi, L. Pontecorvo, M. Primavera, F. Ruggieri, P. Santangelo, E. Santovetti, R. D. Schamberger, B. Sciascia, A. Sciubba, F. Scuri, I. Sfiligoi, A. Sibidanov, T. Spadaro, E. Spiriti, M. Tabidze, G. L. Tong, L. Tortora, P. Valente, B. Valeriani, G. Venanzoni, S. Veneziano, A. Ventura, S. Ventura, R. Versaci, ALOISIO, ALBERTO, AMBROSINO, FABIO, CAPUSSELA, TIZIANA, CHIEFARI, GIOVANNI, DI DONATO, CAMILLA, MEROLA, LEONARDO, NAPOLITANO, MARCO, PERFETTO, FRANCESCO, SARACINO, GIULIO, S., Giovannella, Gorini, Edoardo, Primavera, Margherita, Ventura, Andrea, DI MICCO, Biagio, M., Adinolfi, Aloisio, Alberto, Ambrosino, Fabio, A., Antonelli, M., Antonelli, C., Bacci, G., Bencivenni, S., Bertolucci, C., Bini, C., Bloise, V., Bocci, F., Bossi, P., Branchini, S. A., Bulychjov, G., Cabibbo, R., Caloi, P., Campana, G., Capon, Capussela, Tiziana, G., Carboni, M., Casarsa, V., Casavola, G., Cataldi, F., Ceradini, F., Cervelli, F., Cevenini, Chiefari, Giovanni, P., Ciambrone, S., Conetti, E., De Lucia, P., De Simone, G., De Zorzi, S., Dell'Agnello, A., Denig, A., Di Domenico, DI DONATO, Camilla, S., Di Falco, B., Di Micco, A., Doria, M., Dreucci, O., Erriquez, A., Farilla, G., Felici, A., Ferrari, M. L., Ferrer, G., Finocchiaro, C., Forti, A., Franceschi, P., Franzini, C., Gatti, P., Gauzzi, A., Giannasi, E., Gorini, E., Graziani, M., Incagli, W., Kluge, V., Kulikov, F., Lacava, G., Lanfranchi, J., Lee Franzini, D., Leone, F., Luc, M., Martemianov, M., Matsyuk, W., Mei, Merola, Leonardo, R., Messi, S., Miscetti, M., Moulson, S., Müller, F., Murta, Napolitano, Marco, A., Nedosekin, F., Nguyen, M., Palomba, L., Pacciani, M., Palutan, E., Pasqualucci, L., Passalacqua, A., Passeri, V., Patera, Perfetto, Francesco, E., Petrolo, G., Pirozzi, L., Pontecorvo, M., Primavera, F., Ruggieri, P., Santangelo, E., Santovetti, Saracino, Giulio, R. D., Schamberger, B., Sciascia, A., Sciubba, F., Scuri, I., Sfiligoi, A., Sibidanov, T., Spadaro, E., Spiriti, M., Tabidze, G. L., Tong, L., Tortora, P., Valente, B., Valeriani, G., Venanzoni, S., Veneziano, A., Ventura, S., Ventura, and R., Versaci

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, KLOE phi meson, Astrophysics::High Energy Astrophysical Phenomena, Radiative transfer, High Energy Physics::Experiment, MIXING ANGLE, DETECTOR, MESONS
Abstract

We 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. RI Gauzzi, Paolo/D-2615-2009; valente, paolo/A-6640-2010; ANTONELLI, ANTONELLA/C-6238-2011; Di Domenico, Antonio/G-6301-2011; De Lucia, Erika/D-2250-2011; branchini, paolo/A-4857-2011; Murtas, Fabrizio/B-5729-2012

Published
2003

5. Measurement of hadronic cross section and preliminary results on the pion form factor using the radiative return at DAPHNE

Author

M. Adinolfi, A. Antonelli, M. Antonelli, C. Bacci, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, V. Bocci, F. Bossi, P. Branchini, S. A. Bulychjov, G. Cabibbo, R. Caloi, P. Campana, G. Capon, G. Carboni, M. Casarsa, V. Casavola, G. Cataldi, F. Ceradini, F. Cervelli, P. Ciambrone, S. Conetti, E. De Lucia, P. De Simone, G. De Zorzi, S. Dell'Agnello, A. Denig, A. Di Domenico, S. Di Falco, B. Di Micco, A. Doria, M. Dreucci, O. Erriquez, A. Farilla, G. Felici, A. Ferrari, M. L. Ferrer, G. Finocchiaro, C. Forti, A. Franceschi, P. Franzini, C. Gatti, P. Gauzzi, A. Giannasi, S. Giovannella, E. Gorini, E. Graziani, M. Incagli, W. Kluge, V. Kulikov, F. Lacava, G. Lanfranchi, J. Lee Franzini, D. Leone, F. Luc, M. Martemianov, M. Matsyuk, W. Mei, R. Messi, S. Miscetti, M. Moulson, S. Müller, F. Murtas, A. Nedosekin, F. Nguyen, M. Palomba, L. Pacciani, M. Palutan, E. Pasqualucci, L. Passalacqua, A. Passeri, V. Patera, F. Perfetto, E. Petrolo, G. Pirozzi, L. Pontecorvo, M. Primavera, F. Ruggieri, P. Santangelo, E. Santovetti, R. D. Schamberger, B. Sciascia, A. Sciubba, F. Scuri, I. Sfiligoi, A. Sibidanov, T. Spadaro, E. Spiriti, M. Tabidze, G. L. Tong, L. Tortora, P. Valente, B. Valeriani, G. Venanzoni, S. Veneziano, A. Ventura, S. Ventura, R. Versaci, ALOISIO, ALBERTO, AMBROSINO, FABIO, CAPUSSELA, TIZIANA, CEVENINI, FRANCESCO, CHIEFARI, GIOVANNI, DI DONATO, CAMILLA, MEROLA, LEONARDO, NAPOLITANO, MARCO, SARACINO, GIULIO, M., Adinolfi, Aloisio, Alberto, Ambrosino, Fabio, A., Antonelli, M., Antonelli, C., Bacci, G., Bencivenni, S., Bertolucci, C., Bini, C., Bloise, V., Bocci, F., Bossi, P., Branchini, S. A., Bulychjov, G., Cabibbo, R., Caloi, P., Campana, G., Capon, Capussela, Tiziana, G., Carboni, M., Casarsa, V., Casavola, G., Cataldi, F., Ceradini, F., Cervelli, Cevenini, Francesco, Chiefari, Giovanni, P., Ciambrone, S., Conetti, E., De Lucia, P., De Simone, G., De Zorzi, S., Dell'Agnello, A., Denig, A., Di Domenico, DI DONATO, Camilla, S., Di Falco, B., Di Micco, A., Doria, M., Dreucci, O., Erriquez, A., Farilla, G., Felici, A., Ferrari, M. L., Ferrer, G., Finocchiaro, C., Forti, A., Franceschi, P., Franzini, C., Gatti, P., Gauzzi, A., Giannasi, S., Giovannella, E., Gorini, E., Graziani, M., Incagli, W., Kluge, V., Kulikov, F., Lacava, G., Lanfranchi, J., Lee Franzini, D., Leone, F., Luc, M., Martemianov, M., Matsyuk, W., Mei, Merola, Leonardo, R., Messi, S., Miscetti, M., Moulson, S., Müller, F., Murta, Napolitano, Marco, A., Nedosekin, F., Nguyen, M., Palomba, L., Pacciani, M., Palutan, E., Pasqualucci, L., Passalacqua, A., Passeri, V., Patera, F., Perfetto, E., Petrolo, G., Pirozzi, L., Pontecorvo, M., Primavera, F., Ruggieri, P., Santangelo, E., Santovetti, Saracino, Giulio, R. D., Schamberger, B., Sciascia, A., Sciubba, F., Scuri, I., Sfiligoi, A., Sibidanov, T., Spadaro, E., Spiriti, M., Tabidze, G. L., Tong, L., Tortora, P., Valente, B., Valeriani, G., Venanzoni, S., Veneziano, A., Ventura, S., Ventura, and R., Versaci

Subjects
Physics, Nuclear and High Energy Physics, Electron–positron annihilation, Nuclear Theory, Hadron, Form factor (quantum field theory), FOS: Physical sciences, Atomic and Molecular Physics, and Optics, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Cross section (physics), Pion, Radiative transfer, High Energy Physics::Experiment, Nuclear Experiment
Abstract

In the fixed energy environment of the $e^{+}e^{-}$ collider DA$\Phi$NE, KLOE can measure the cross section of the process $e^{+}e^{-} \to$ hadrons as a function of the hadronic system energy using the radiative return. At energies below 1 GeV, $e^{+}e^{-} \to \rho \to \pi^{+}\pi^{-}$ is the dominating hadronic process. We report here on the status of the analysis for the $e^{+}e^{-} \to \ppg$ channel, which allows to obtain a preliminary measurement of the pion form factor using an integrated luminosity of $\sim73 pb^{-1}$., Comment: Invited talk at the Seventh International Workshop on Tau Lepton Physics (TAU02-WE07), Santa Cruz, Ca, USA, Sept 2002, 9 pages, LaTeX, 9 eps figures

Published
2002

6. The neutron-proton charge-exchange amplitudes measured in the dp -> ppn reaction

Author

D. Mchedlishvili, S. Barsov, J. Carbonell, D. Chiladze, S. Dymov, A. Dzyuba, R. Engels, R. Gebel, V. Glagolev, K. Grigoryev, P. Goslawski, M. Hartmann, A. Kacharava, V. Kamerdzhiev, I. Keshelashvili, A. Khoukaz, V. Komarov, P. Kulessa, A. Kulikov, A. Lehrach, N. Lomidze, B. Lorentz, G. Macharashvili, R. Maier, S. Merzliakov, M. Mielke, M. Mikirtychyants, S. Mikirtychyants, M. Nioradze, H. Ohm, M. Papenbrock, D. Prasuhn, F. Rathmann, V. Serdyuk, H. Seyfarth, H. J. Stein, E. Steffens, H. Stockhorst, H. Ströher, M. Tabidze, S. Trusov, Yu. Uzikov, Yu. Valdau, C. Wilkin, Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, Spectrometer, 010308 nuclear & particles physics, Impulse (physics), 01 natural sciences, Amplitude, Deuterium, 0103 physical sciences, ddc:530, Neutron, Atomic physics, 010306 general physics, Nuclear Experiment, Storage ring, Excitation
Abstract

The unpolarised differential cross section and the two deuteron tensor analysing powers A_{xx} and A_{yy} of the pol{d}p -> (pp)n charge-exchange reaction have been measured with the ANKE spectrometer at the COSY storage ring. Using deuteron beams with energies 1.2, 1.6, 1.8, and 2.27 GeV, data were obtained for small momentum transfers to a (pp) system with low excitation energy. The results at the three lower energies are consistent with impulse approximation predictions based upon the current knowledge of the neutron-proton amplitudes. However, at 2.27GeV, where these amplitudes are far more uncertain, agreement requires a reduction in the overall double-spin-flip contribution, with an especially significant effect in the longitudinal direction. These conclusions are supported by measurements of the deuteron-proton spin-correlation parameters C_{x,x} and C_{y,y} that were carried out in the pol{d}pol{p} -> (pp)n reaction at 1.2 and 2.27GeV. The values obtained for the proton analysing power also suggest the need for a radical re-evaluation of the neutron-proton elastic scattering amplitudes at the higher energy. It is therefore clear that such measurements can provide a valuable addition to the neutron-proton database in the charge-exchange region., Comment: 13 pages with 13 figures

Published
2012
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7. The Hadronic Cross Section Measurement at KLOE

Author

Aloisio 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, Capussela T, Carboni G, Cataldi G, CERADINI, Filippo, Cervelli F, Cevenini F, Chiefari G, Ciambrone P, Conetti S, De Lucia E, De Simone P, De Zorzi C, Dell'Agnello S, Denig A, Di Domenico A, Di Donato C, Di Falco S, DI MICCO, Biagio, Doria A, Dreucci T, Erriquez O, Farilla A, Felici G, Ferrari A, Ferrer ML, Finocchiaro G, Forti C, Franceschi A, Franzini P, Gatti C, Gauzzi P, Giovanella S, Gorini E, Graziani E, 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, Perfetto F, Petrolo E, Pontecorvo L, Primavera M, Ruggieri F, Santangelo P, Samovetti E, Saracino G, Schamberger RD, Sciascia B, Sciubba A, Scuri F, Sfiligoi I, Sibidanov A, Spadaro T, Spiriti E, Testa M, Tortora L, Valente P, Valeriani B, Venanzoni G, Veneziano S, Ventura A, Ventura S, Versaci R, Villella V, Xu G., Aloisio, Alberto, Ambrosino, Fabio, Chiefari, Giovanni, Cevenini, Francesco, Merola, Leonardo, Napolitano, Marco, Saracino, Giulio, Aloisio, 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, Capussela, T, Carboni, G, Cataldi, G, Ceradini, F, Cervelli, F, Cevenini, F, Chiefari, G, Ciambrone, P, Conetti, S, DE LUCIA, E, DE SIMONE, P, DE ZORZI, C, Dell'Agnello, S, Denig, A, DI DOMENICO, A, DI DONATO, C, DI FALCO, S, DI MICCO, B, Doria, A, Dreucci, T, Erriquez, O, Farilla, A, Felici, G, Ferrari, A, Ferrer, Ml, Finocchiaro, G, Forti, C, Franceschi, A, Franzini, P, Gatti, C, Gauzzi, P, Giovanella, S, Gorini, Edoardo, Graziani, E, 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, Perfetto, F, Petrolo, E, Pontecorvo, L, Primavera, Margherita, Ruggieri, F, Santangelo, P, Samovetti, E, Saracino, G, Schamberger, Rd, Sciascia, B, Sciubba, A, Scuri, F, Sfiligoi, I, Sibidanov, A, Spadaro, T, Spiriti, E, Testa, M, Tortora, L, Valente, P, Valeriani, B, Venanzoni, G, Veneziano, S, Ventura, Andrea, Ventura, S, Versaci, R, Villella, V, Xu, G., Antonelli, A., Antonelli, M., Bacci, C., Bencivenni, G., Capon, G., Capussela, Tiziana, Cervelli, De Lucia, E, De Simone, P, De Zorzi, C, Di Domenico, A, DI DONATO, Camilla, Di Falco, S, Di Micco, B, Gorini, E, Lee Franzini, J, Palutan, M., Pasqualucci, E., Perfetto, Francesco, Primavera, M, Tortora, L., Ventura, A, A., Aloisio, F., Ambrosino, A., Antonelli, M., Antonelli, C., Bacci, M., Barva, G., Bencivenni, S., Bertolucci, C., Bini, C., Bloise, V., Bocci, F., Bossi, P., Branchini, S. A., Bulychjov, R., Caloi, P., Campana, G., Capon, T., Capussela, G., Carboni, F., Ceradini, F., Cervelli, F., Cevenini, G., Chiefari, P., Ciambrone, S., Conetti, E., De Lucia, A., De Santi, 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, O., Erriquez, A., Farilla, G., Felici, A., Ferrari, M. L., Ferrer, G., Finocchiaro, C., Forti, P., Franzini, C., Gatti, P., Gauzzi, S., Giovannella, E., Graziani, M., Incagli, W., Kluge, V., Kulikov, F., Lacava, G., Lanfranchi, Juliet Lee, Franzini, D., Leone, F., Lu, M., Martemyanov, M., Martini, M., Matsyuk, W., Mei, L., Merola, R., Messi, S., Miscetti, M., Moulson, S., Muller, F., Murta, M., Napolitano, F., Nguyen, M., Palutan, E., Pasqualucci, L., Passalacqua, A., Passeri, V., Patera, F., Perfetto, E., Petrolo, L., Pontecorvo, P., Santangelo, E., Santovetti, G., Saracino, R., Dean Schamberger, B., Sciascia, A., Sciubba, F., Scuri, I., Sfiligoi, A., Sibidanov, T., Spadaro, E., Spiriti, M., Tabidze, M., Testa, L., Tortora, P., Valente, B., Valeriani, G., Venanzoni, S., Veneziano, R., Versaci, I., Villella, G., Xu, E., DE LUCIA, A., DE SANTIS, P., DE SIMONE, G., DE ZORZI, A., DI DOMENICO, C., DI DONATO, S., DI FALCO, B., DI MICCO, J., LEE FRANZINI, M., Primavera, R. D., Schamberger, Barva, M, Ceradini, Filippo, De Santis, A, De Zorzi, G, Di Donato, C, DI MICCO, Biagio, Dreucci, M, Giovannella, S, Martini, M, Santovetti, E, Tabidze, M, Villella, I, Xu, G, and Leone, D.

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, Photon, Luminosity (scattering theory), RADIATIVE RETURN, TAGGED PHOTONS, ANNIHILATION, NLO, Hadron, NLO, Measure (mathematics), Atomic and Molecular Physics, and Optics, Nuclear physics, Cross section (physics), RADIATIVE RETURN, TAGGED PHOTONS, Pion, Radiative transfer, Invariant mass, ANNIHILATION, KLOE Hadronic cross section
Abstract

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.

Published
2005

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