Search

Your search keyword '"M., Tabidze"' showing total 15 results
Start Over Author "M., Tabidze" Topic physics
15 results on '"M., Tabidze"'

1. First Search for Axionlike Particles in a Storage Ring Using a Polarized Deuteron Beam

Author

S. Karanth, E. J. Stephenson, S. P. Chang, V. Hejny, S. Park, J. Pretz, Y. K. Semertzidis, A. Wirzba, A. Wrońska, F. Abusaif, A. Aggarwal, A. Aksentev, B. Alberdi, A. Andres, L. Barion, I. Bekman, M. Beyß, C. Böhme, B. Breitkreutz, C. von Byern, N. Canale, G. Ciullo, S. Dymov, N.-O. Fröhlich, R. Gebel, K. Grigoryev, D. Grzonka, J. Hetzel, O. Javakhishvili, H. Jeong, A. Kacharava, V. Kamerdzhiev, I. Keshelashvili, A. Kononov, K. Laihem, A. Lehrach, P. Lenisa, N. Lomidze, B. Lorentz, A. Magiera, D. Mchedlishvili, F. Müller, A. Nass, N. N. Nikolaev, A. Pesce, V. Poncza, D. Prasuhn, F. Rathmann, A. Saleev, D. Shergelashvili, V. Shmakova, N. Shurkhno, S. Siddique, J. Slim, H. Soltner, R. Stassen, H. Ströher, M. Tabidze, G. Tagliente, Y. Valdau, M. Vitz, T. Wagner, and P. Wüstner

Subjects
Physics, QC1-999
Abstract

Based on the notion that the local dark-matter field of axions or axionlike particles (ALPs) in our Galaxy induces oscillating couplings to the spins of nucleons and nuclei (via the electric dipole moment of the latter and/or the paramagnetic axion-wind effect), we establish the feasibility of a new method to search for ALPs in storage rings. Based on previous work that allows us to maintain the in-plane polarization of a stored deuteron beam for a few hundred seconds, we perform a first proof-of-principle experiment at the Cooler Synchrotron (COSY) to scan momenta near 970 MeV/c. This entails a scan of the spin-precession frequency. At resonance between the spin-precession frequency of deuterons and the ALP-induced electric dipole moment (EDM) oscillation frequency, there is an accumulation of the polarization component out of the ring plane. Since the axion frequency is unknown, the momentum of the beam and, consequently, the spin-precession frequency are ramped to search for a vertical polarization change that occurs when the resonance is crossed. At COSY, four beam bunches with different polarization directions are used to make sure that no resonance is missed because of the unknown relative phase between the polarization precession and the axion or ALP field. A frequency window of 1.5 kHz width around the spin-precession frequency of 121 kHz is scanned. We describe the experimental procedure and a test of the methodology with the help of a radio-frequency Wien filter located on the COSY ring. No ALP resonance is observed. As a consequence, an upper limit of the oscillating EDM component of the deuteron as well as its axion coupling constants are provided.

Published
2023
Full Text
View/download PDF

2. Low-energy spin-physics experiments with polarized beams and targets at the COSY storage ring

Author

P. Lenisa, F. Rathmann, L. Barion, S. Barsov, S. Bertelli, V. Carassiti, G. Ciullo, M. Contalbrigo, A. Cotta Ramusino, S. Dymov, R. Engels, D. Eversheim, R. Gebel, K. Grigoryev, J. Haidenbauer, V. Hejny, H. Jagdfeld, A. Kacharava, I. Keshelashvili, A. Kononov, T. Krings, A. Kulikov, A. Lehrach, B. Lorentz, N. Lomidze, G. Macharashvili, R. Malaguti, S. Martin, S. Merzliakov, S. Mikirtychiants, A. Nass, N.N. Nikolaev, A. Pesce, D. Prasuhn, L. Semke, S. Squerzanti, H. Soltner, M. Statera, E. Steffens, H. Ströher, M. Tabidze, G. Tagliente, P. Thörngren-Engblom, S. Trusov, Yu. Uzikov, Yu. Valdau, C. Weidemann, P. Wüstner, and P. Zupranski

Subjects
Polarized beams, Particle accelerators, Storage rings, Beam handling, Solid-state detectors, Physics, QC1-999, Optics. Light, QC350-467, Descriptive and experimental mechanics, QC120-168.85
Abstract

Abstract A low-energy spin-physics program is being developed at the COSY storage ring. To support the planned experimental activities, several experimental tools for polarized beams and targets have been developed. The paper presents the physics case and the readiness of the setup for its realization.

Published
2019
Full Text
View/download PDF

3. Coherent pion production in proton–deuteron collisions

Author

S. Dymov, V. Shmakova, D. Mchedlishvili, T. Azaryan, S. Barsov, A. Dzyuba, R. Engels, R. Gebel, P. Goslawski, B. Gou, K. Grigoryev, M. Hartmann, A. Kacharava, V. Komarov, A. Khoukaz, P. Kulessa, A. Kulikov, V. Kurbatov, N. Lomidze, B. Lorentz, G. Macharashvili, S. Merzliakov, M. Mielke, S. Mikirtytchiants, M. Nioradze, H. Ohm, M. Papenbrock, D. Prasuhn, F. Rathmann, V. Serdyuk, H. Seyfarth, H. Ströher, M. Tabidze, S. Trusov, D. Tsirkov, Yu. Uzikov, Yu. Valdau, C. Wilkin, and P. Wüstner

Subjects
Physics, QC1-999
Abstract

Values of the proton analysing power in the pd→He3π0/H3π+ reactions at 350–360 MeV per nucleon were obtained by using a polarised proton beam incident on a deuterium cluster-jet target and with a polarised deuteron beam incident on a target cell filled with polarised hydrogen. These results have a much larger angular coverage than existing data. First measurements are also presented of the deuteron vector analysing power and the deuteron–proton spin correlations. Data were also obtained on the deuteron–proton spin correlation and proton analysing power at small angles at 600 MeV per nucleon, though the angular coverage at this energy was much more restricted even when using a deuteron beam. By combining the extrapolated values of the spin correlations to the forward or backward directions with published measurements of the deuteron tensor analysing powers, the relative phases between the two non-vanishing amplitudes were evaluated. Keywords: Pion production, Analysing powers, Spin correlations

Published
2016
Full Text
View/download PDF

4. Measurement of the absolute differential cross section of proton–proton elastic scattering at small angles

Author

D. Mchedlishvili, D. Chiladze, S. Dymov, Z. Bagdasarian, S. Barsov, R. Gebel, B. Gou, M. Hartmann, A. Kacharava, I. Keshelashvili, A. Khoukaz, P. Kulessa, A. Kulikov, A. Lehrach, N. Lomidze, B. Lorentz, R. Maier, G. Macharashvili, S. Merzliakov, S. Mikirtychyants, M. Nioradze, H. Ohm, D. Prasuhn, F. Rathmann, V. Serdyuk, D. Schroer, V. Shmakova, R. Stassen, H.J. Stein, H. Stockhorst, I.I. Strakovsky, H. Ströher, M. Tabidze, A. Täschner, S. Trusov, D. Tsirkov, Yu. Uzikov, Yu. Valdau, C. Wilkin, R.L. Workman, and P. Wüstner

Subjects
Physics, QC1-999
Abstract

The differential cross section for proton–proton elastic scattering has been measured at a beam kinetic energy of 1.0 GeV and in 200 MeV steps from 1.6 to 2.8 GeV for centre-of-mass angles in the range from 12°–16° to 25°–30°, depending on the energy. A precision in the overall normalisation of typically 3% was achieved by studying the energy losses of the circulating beam of the COSY storage ring as it passed repeatedly through the windowless hydrogen target of the ANKE magnetic spectrometer. It is shown that the data have a significant impact upon the results of a partial wave analysis. After extrapolating the differential cross sections to the forward direction, the results are broadly compatible with the predictions of forward dispersion relations. Keywords: Proton–proton elastic scattering, Differential cross section

Published
2016
Full Text
View/download PDF

5. Analysing powers and spin correlations in deuteron–proton charge exchange at 726 MeV

Author

S. Dymov, T. Azaryan, Z. Bagdasarian, S. Barsov, J. Carbonell, D. Chiladze, R. Engels, R. Gebel, K. Grigoryev, M. Hartmann, A. Kacharava, A. Khoukaz, V. Komarov, P. Kulessa, A. Kulikov, V. Kurbatov, N. Lomidze, B. Lorentz, G. Macharashvili, D. Mchedlishvili, S. Merzliakov, M. Mielke, M. Mikirtychyants, S. Mikirtychyants, M. Nioradze, H. Ohm, D. Prasuhn, F. Rathmann, V. Serdyuk, H. Seyfarth, V. Shmakova, H. Ströher, M. Tabidze, S. Trusov, D. Tsirkov, Yu. Uzikov, Yu. Valdau, C. Weidemann, and C. Wilkin

Subjects
Physics, QC1-999
Abstract

The charge exchange of vector polarised deuterons on a polarised hydrogen target has been studied in a high statistics experiment at the COSY-ANKE facility at a deuteron beam energy of Td=726 MeV. By selecting two fast protons at low relative energy Epp, the measured analysing powers and spin correlations are sensitive to interference terms between specific neutron–proton charge-exchange amplitudes at a neutron kinetic energy of Tn≈12Td=363 MeV. An impulse approximation calculation, which takes into account corrections due to the angular distribution in the diproton, describes reasonably the dependence of the data on both Epp and the momentum transfer. This lends broad support to the current neutron–proton partial wave solution that was used in the estimation. Keywords: Neutron–proton charge exchange, Polarised deuterons, Polarised protons

Published
2015
Full Text
View/download PDF

6. Study of the pd→→n{pp}s charge-exchange reaction using a polarised deuterium target

Author

B. Gou, D. Mchedlishvili, Z. Bagdasarian, S. Barsov, J. Carbonell, D. Chiladze, S. Dymov, R. Engels, M. Gaisser, R. Gebel, K. Grigoryev, M. Hartmann, A. Kacharava, A. Khoukaz, P. Kulessa, A. Kulikov, A. Lehrach, Z. Li, N. Lomidze, B. Lorentz, G. Macharashvili, S. Merzliakov, M. Mielke, M. Mikirtychyants, S. Mikirtychyants, M. Nioradze, H. Ohm, D. Prasuhn, F. Rathmann, V. Serdyuk, H. Seyfarth, V. Shmakova, H. Ströher, M. Tabidze, S. Trusov, D. Tsirkov, Yu. Uzikov, Yu. Valdau, T. Wang, C. Weidemann, C. Wilkin, and X. Yuan

Subjects
Physics, QC1-999
Abstract

The vector and tensor analysing powers, Ay and Ayy, of the pd→→n{pp}s charge-exchange reaction have been measured at a beam energy of 600 MeV at the COSY-ANKE facility by using an unpolarised proton beam incident on an internal storage cell target filled with polarised deuterium gas. The low energy recoiling protons were measured in a pair of silicon tracking telescopes placed on either side of the target. Putting a cut of 3 MeV on the diproton excitation energy ensured that the two protons were dominantly in the S01 state, here denoted by {pp}s. The polarisation of the deuterium gas was established through measurements in parallel of proton–deuteron elastic scattering. By analysing events where both protons entered the same telescope, the charge-exchange reaction was measured for momentum transfers q≥160 MeV/c. These data provide a good continuation of the earlier results at q≤140 MeV/c obtained with a polarised deuteron beam. They are also consistent with impulse approximation predictions with little sign evident for any modifications due to multiple scatterings. These successful results confirm that the ANKE deuteron charge-exchange programme can be extended to much higher energies with a polarised deuterium target than can be achieved with a polarised deuteron beam. Keywords: Deuteron charge exchange, Polarisation effects

Published
2015
Full Text
View/download PDF

7. Measurement of the analysing power in proton–proton elastic scattering at small angles

Author

Z. Bagdasarian, D. Chiladze, S. Dymov, A. Kacharava, G. Macharashvili, S. Barsov, R. Gebel, B. Gou, M. Hartmann, I. Keshelashvili, A. Khoukaz, P. Kulessa, A. Kulikov, A. Lehrach, N. Lomidze, B. Lorentz, R. Maier, D. Mchedlishvili, S. Merzliakov, S. Mikirtychyants, M. Nioradze, H. Ohm, M. Papenbrock, D. Prasuhn, F. Rathmann, V. Serdyuk, V. Shmakova, R. Stassen, H. Stockhorst, I.I. Strakovsky, H. Ströher, M. Tabidze, A. Täschner, S. Trusov, D. Tsirkov, Yu. Uzikov, Yu. Valdau, C. Wilkin, and R.L. Workman

Subjects
Physics, QC1-999
Abstract

The proton analysing power in p→p elastic scattering has been measured at small angles at COSY-ANKE at 796 MeV and five other beam energies between 1.6 and 2.4 GeV using a polarised proton beam. The asymmetries obtained by detecting the fast proton in the ANKE forward detector or the slow recoil proton in a silicon tracking telescope are completely consistent. Although the analysing power results agree well with the many published data at 796 MeV, and also with the most recent partial wave solution at this energy, the ANKE data at the higher energies lie well above the predictions of this solution at small angles. An updated phase shift analysis that uses the ANKE results together with the World data leads to a much better description of these new measurements. Keywords: Proton–proton elastic scattering, Analysing power, Phase shift analysis

Published
2014
Full Text
View/download PDF

8. 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
Full Text
View/download PDF

9. 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
Full Text
View/download PDF

10. 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

11. Recent KLOE Results on Kaon Physics

Author

AMBROSINO, FABIO, 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, T. Capussela, 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, T., Capussela, 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
Physics, Nuclear physics, Particle physics, Annihilation, Branching fraction, Center of mass
Abstract

The KLOE experiment at DAΦNE has collected ∼ 450 pb−1 of e+e− collisions at center of mass energy W ∼ 1.02 GeV. Final results on the BR(KS → 3π0), KL dominant Branching ratio, KL lifetime and the extraction of the CKM parameter Vus are presented.

Published
2005
Full Text
View/download PDF

12. 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

13. 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

14. 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
Full Text
View/download PDF

15. 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

Catalog

Books, media, physical & digital resources
See catalog results