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7 results on '"L. Iafolla"'

1. Precision measurements of the e+e−→π+π−(γ) cross section with the KLOE detector

Author

G. Mandaglio, D. Babusci, D. Badoni, I. Balwierz-Pytko, G. Bencivenni, C. Bini, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, G. Capon, F. Ceradini, P. Ciambrone, E. Czerwiński, E. Danè, E. De Lucia, G. De Robertis, A. De Santis, A. Di Domenico, C. Di Donato, R. Di Salvo, D. Domenici, O. Erriquez, G. Fanizzi, A. Fantini, G. Felici, S. Fiore, P. Franzini, P. Gauzzi, G. Giardina, S. Giovannella, F. Gonnella, E. Graziani, F. Happacher, L. Heijkenskjöld, B. Höistad, L. Iafolla, M. Jacewicz, T. Johansson, A. Kupsc, J. Lee-Franzini, B. Leverington, F. Loddo, S. Loffredo, M. Martemianov, M. Martini, M. Mascolo, R. Messi, S. Miscetti, G. Morello, D. Moricciani, P. Moskal, F. Nguyen, A. Passeri, V. Patera, I. Prado Longhi, A. Ranieri, C.F. Redmer, P. Santangelo, I. Sarra, M. Schioppa, B. Sciascia, M. Silarski, C. Taccini, L. Tortora, G. Venanzoni, W. Wiślicki, M. Wolke, and J. Zdebik

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Luminosity (scattering theory), Photon, Anomalous magnetic dipole moment, Hadron, Form factor (quantum field theory), Atomic and Molecular Physics, and Optics, Nuclear physics, Pion, High Energy Physics::Experiment, Anomaly (physics)
Abstract

The muon anomalous magnetic moment is one of the most precisely measured quantities in particle physics and a persistent discrepancy of about 3 σ between standard model (SM) prediction and the experimental measurement has been observed. The leading order contribution aμhlo is actually the main source of uncertainty in the theoretical evaluation of the muon anomaly. It is obtained by a dispersion integral using the precision measurement of hadronic cross section. The KLOE experiment at the DAΦNE ϕ−factory in Frascati was the first to exploit Initial State Radiation (ISR) processes to obtain the e+e−→π+π−(γ) cross section below 1 GeV, that accounts for most (70%) of the leading order contribution to the muon anomaly. In year 2005 and 2008 the KLOE-collaboration has published two measurements of the π+π− cross section with the photon in the initial state emitted at small angle, and an independent measurement with the photon emitted at large angle was finalized in year 2011. These measurements were normalized using luminosity from Bhabha. In the last years, a new analysis of KLOE data has been performed for obtaining the pion form factor directly from the bin-by-bin π+π−γ to μ+μ−γ ratio. We present the results of this new measurement, showing the comparison with our previous measurements, and its impact on the hadronic contribution to the muon anomaly.

Published
2014
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2. A new limit on the CP violating decay KS→3π0 with the KLOE experiment

Author

Paweł Moskal, M. Martemianov, C. F. Redmer, P. Franzini, J. Lee-Franzini, G. Fanizzi, G. Venanzoni, D. Moricciani, G. Capon, V. De Leo, E. De Lucia, I. Balwierz-Pytko, F. Nguyen, I. Prado Longhi, Cecilia Taccini, Magnus Wolke, B. Leverington, Lena Heijkenskjöld, C. Di Donato, K. Kacprzak, P. Gauzzi, F. Loddo, Giuseppe Mandaglio, S. Loffredo, L. Tortora, L. Iafolla, S. Fiore, A. De Santis, P. Ciambrone, Michał Silarski, Bo Höistad, O. Erriquez, Marek Jacewicz, A. Ranieri, P. Santangelo, Francesca Curciarello, Antonio Budano, G. Giardina, E. Graziani, A. Passeri, Vincenzo Patera, Andrzej Kupsc, Marco Schioppa, A. Di Domenico, Cesare Bini, A. Fantini, Jarosław Zdebik, Barbara Sciascia, M. Martini, S. Giovannella, Eryk Czerwiński, G. Bencivenni, S. Miscetti, D. Domenici, W. Wiślicki, F. Gonnella, D. Babusci, Gianfranco Morello, L. Caldeira Balkeståhl, I. Sarra, F. Bossi, E. Dané, R. Messi, T. Johansson, C. Bloise, M. Mascolo, R. Di Salvo, F. Happacher, P. Branchini, G. De Robertis, G. Felici, Davide Badoni, and F. Ceradini

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, 010308 nuclear & particles physics, 01 natural sciences, Standard Model, Calorimeter, Nuclear physics, 0103 physical sciences, CP violation, Direct search, Limit (mathematics), 010306 general physics
Abstract

We have carried out a new direct search for the CP violating decay K-S -> 3 pi(0) with 1.7 fb(-1) of e(+)e(-) collisions collected by the KLOE detector at the Phi-factory DA Phi NE. We have searched for this decay in a sample of about 5.9 x 10(8) KSKL events tagging the K-S by means of the K-L interaction in the calorimeter and requiring six prompt photons. With respect to our previous search, the analysis has been improved by increasing of a factor four the tagged sample and by a more effective background rejection of fake K-S tags and spurious clusters. We find no candidates in data and simulated background samples, while we expect 0.12 standard model events. Normalizing to the number of K-S -> 2 pi(0) events in the same sample, we set the upper limit on BR(K-S -> 3 pi(0))

Published
2013
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3. Search for a vector gauge boson in ϕ meson decays with the KLOE detector

Author

Anna Bozena Kowalewska, A. Ranieri, E. Iarocci, A. Di Domenico, Cesare Bini, Barbara Sciascia, M. Martini, C. Bloise, P. Ciambrone, Cecilia Taccini, I. Prado Longhi, Vincenzo Patera, Andrzej Kupsc, P. Franzini, Giuseppe Mandaglio, G. Venanzoni, L. Iafolla, S. Fiore, Bo Höistad, G. De Robertis, Marco Schioppa, A. Sciubba, F. Bossi, E. Graziani, D. Domenici, C. F. Redmer, Davide Badoni, G. Bencivenni, S. A. Bulychjev, L. Tortora, R. Messi, M. Matsyuk, S. Giovannella, G. Felici, Jarosław Zdebik, D. Babusci, F. Ceradini, G. De Zorzi, V. Bocci, Eryk Czerwiński, Marek Jacewicz, I. Sarra, J. Lee-Franzini, I. Balwierz, G. Capon, O. Erriquez, Antonio Budano, A. Passeri, R. Versaci, Michał Silarski, F. Archilli, F. Happacher, Stefania Antonia Stucci, E. De Lucia, Tord Johansson, G. Giardina, D. Moricciani, S. Miscetti, Li Caldeira Balkeståhl, F. Nguyen, Magnus Wolke, P. Gauzzi, V. Kulikov, F. Loddo, Gianfranco Morello, F. Gonnella, E. Dané, P. Branchini, C. Di Donato, M. Mascolo, Paweł Moskal, M. Martemianov, P. Santangelo, Pierluigi Campana, W. Wislicki, A. De Santis, G. Fanizzi, Archilli, F, Ceradini, Filippo, and PRADO LONGHI, Ivan

Subjects
Dark forces, Nuclear and High Energy Physics, Particle physics, Meson, Electron–positron annihilation, e+e− collisions, Hadron, Elementary particle, $e ^{+} e^{−}$ collisions, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, 0103 physical sciences, gauge vector boson, 010306 general physics, Boson, Physics, Gauge boson, 010308 nuclear & particles physics, Phi meson, 3. Good health, dark forces, Physics::Accelerator Physics, e+e- collisions, High Energy Physics::Experiment, Gauge vector boson, Lepton
Abstract

The existence of a light dark force mediator has been tested with the KLOE detector at DAPHNE. This particle, called U, is searched for using the decay chain phi-->etaU, eta-->pi+pi-pi0, U-->e+e-. No evidence is found in 1.5 fb-1 of data. The resulting exclusion plot covers the mass range 5, Comment: 13 pages, 8 figures

Published
2012
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4. Gamma–gamma tagging system for KLOE2 experiment

Author

R. Messi, F. Gonnella, L. Iafolla, Davide Badoni, Lina Quintieri, F. Archilli, D. Moricciani, Matteo Mario Beretta, and D. Babusci

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Detector, Measure (physics), Sigma, Context (language use), Instrumentation, Tag system, Lepton, Gamma gamma
Abstract

The gamma–gamma physics is a relevant part of the physics programme of KLOE2 project at DA Φ NE . In particular, there is a strong interest to measure the cross-section for the process γ γ → π 0 π 0 in the low energy region for its relevance in the context of the assessing the existence and nature of the sigma meson. In this talk we present the tagging system for the final leptons which we are developing. We will illustrate the characteristics and performance required for the detectors and the acquisition system. In particular, this system should be able to acquire data for each bunch crossing and therefore to a frequency of 368 MHz.

Published
2010
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5. KLOE results in flavour physics and prospects for KLOE-2

Author

E. Czerwiński, D. Babusci, D. Badoni, I. Balwierz, G. Bencivenni, C. Bini, C. Bloise, V. Bocci, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, G. Capon, F. Ceradini, P. Ciambrone, E. Dané, E. De Lucia, G. De Robertis, A. De Santis, A. Di Domenico, C. Di Donato, R. Di Salvo, D. Domenici, O. Erriquez, G. Fanizzi, A. Fantini, G. Felici, S. Fiore, P. Franzini, P. Gauzzi, G. Giardina, S. Giovannella, F. Gonnella, E. Graziani, F. Happacher, B. Höistad, L. Iafolla, E. Iarocci, M. Jacewicz, T. Johansson, A. Kupść, J. Lee-Franzini, B. Leverington, F. Loddo, G. Mandaglio, M. Martemianov, M. Martini, M. Mascolo, R. Messi, S. Miscetti, G. Morello, D. Moricciani, P. Moskal, F. Nguyen, A. Passeri, V. Patera, I. Prado Longhi, A. Ranieri, C.F. Redmer, P. Santangelo, I. Sarra, M. Schioppa, B. Sciascia, M. Silarski, C. Taccini, L. Tortora, G. Venanzoni, R. Versaci, W. Wiślicki, M. Wolke, and J. Zdebik

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, KLOE-2, Detector, Flavour, Atomic and Molecular Physics, and Optics, flavour, Nuclear physics, Interferometry, CP, Quantum state, KLOE, Quantum interference, Homogeneous space, Physics::Accelerator Physics, High Energy Physics::Experiment, CPT, Quantum
Abstract

The ϕ-factory DAΦNE offers a possibility to select pure kaon beams, charged and neutral ones. In particular, neutral kaons from ϕ → K S K L are produced in pairs and the detection of a K S ( K L ) tags the presence of a K L ( K S ) . This allows to perform precise measurements of kaon properties by means of KLOE detector. Another advantage of a ϕ-factory consists in fact that the neutral kaon pairs are produced in a pure quantum state ( J P C = 1 − − ) , which allows to investigate CP and CPT symmetries via quantum interference effects, as well as the basic principles of quantum mechanics. A review of the most recent results of the KLOE experiment at DAΦNE using pure kaon beams or via quantum interferometry is presented together with prospects for kaon physics at KLOE–2.

Published
2013

6. Measurement of η meson production in γγ interactions and Γ(η → γγ) with the KLOE detector

Author

S. Miscetti, Marek Jacewicz, C. F. Redmer, G. Capon, Michał Silarski, Magnus Wolke, Antonio Budano, D. Domenici, A. Di Domenico, F. Loddo, Cecilia Taccini, O. Erriquez, P. Franzini, L. Iafolla, S. Loffredo, S. Fiore, A. Fantini, Paolo Santangelo, Bo Höistad, F. Bossi, P. Gauzzi, D. Babusci, E. De Lucia, E. Graziani, Cesare Bini, I. Balwierz-Pytko, W. Wislicki, R. Di Salvo, A. Ranieri, G. Venanzoni, Gianfranco Morello, Vincenzo Patera, Andrzej Kupsc, P. Branchini, Barbara Sciascia, F. Gonnella, R. Messi, D. Moricciani, M. Martini, L. Heijkenskj, T. Johansson, Marco Schioppa, Giuseppe Mandaglio, C. Bloise, L. Caldeira Balkestaahl, Jarosław Zdebik, L. Tortora, M. Mascolo, Eryk Czerwiński, Davide Badoni, I. Sarra, G. Giardina, F. Happacher, G. Bencivenni, Paweł Moskal, M. Martemianov, G. Felici, C. Di Donato, A. Passeri, G. Fanizzi, B. Leverington, Juliet Lee-Franzini, G. De Robertis, F. Nguyen, S. Giovannella, E. Dané, A. De Santis, Filippo Ceradini, Paolo Ciambrone, I. Prado Longhi, Babusci, D, Ceradini, Filippo, and PRADO LONGHI, Ivan

Subjects
Settore FIS/01, Physics, Particle physics, Nuclear and High Energy Physics, Meson production, 010308 nuclear & particles physics, Eta meson, Electron, 01 natural sciences, Gamma gamma, Luminosity, Positron, 0103 physical sciences, Production (computer science), Combined result, 010306 general physics
Abstract

We present a measurement of η meson production in photon-photon interactions produced by electron-positron beams colliding with $ \sqrt{s}=1 $ GeV. The measurement is done with the KLOE detector at the ϕ-factory DAΦNE with an integrated luminosity of 0.24 fb−1. The e + e − → e + e − η cross section is measured without detecting the out-going electron and positron, selecting the decays η → π + π − π 0 and η → π 0 π 0 π 0. The most relevant background is due to e + e − → ηγ when the monochromatic photon escapes detection. The cross section for this process is measured as σ(e + e − → ηγ) = (856 ± 8stat ± 16syst) pb. The combined result for the e + e − → e + e − η cross section is σ(e + e − → e + e − η) = (32.72 ± 1.27stat ± 0.70syst) pb. From this we derive the partial width Γ(η → γγ) = (520 ± 20stat ± 13syst) eV. This is in agreement with the world average and is the most precise measurement to date.

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7. Status and perspectives of the KLOE-2 experiment

Author

E. Iarocci, Jarosław Zdebik, F. Bossi, Juliet Lee-Franzini, D. Babusci, Michał Silarski, G. De Robertis, P. Branchini, I. Prado Longhi, G. Venanzoni, E. De Lucia, F. Gonnella, Gianfranco Morello, Maxim Martemianov, P. Gauzzi, W. Wislicki, S. Miscetti, Giuseppe Mandaglio, O. Erriquez, Marek Jacewicz, G. Capon, A. Di Domenico, C. F. Redmer, C. Bloise, A. Budano, P. Campana, R. Versaci, Eryk Czerwiński, Filippo Ceradini, E. Dané, Anna Bozena Kowalewska, Cesare Bini, Paolo Ciambrone, D. Moricciani, M. A. Matsyuk, I. Sarra, Davide Badoni, A. Ranieri, S. Giovannella, Cecilia Taccini, C. Di Donato, G. De Zorzi, D. Domenici, Paolo Santangelo, L. Iafolla, S. Fiore, Bo Höistad, E. Graziani, Stefania Antonia Stucci, Barbara Sciascia, P. Franzini, M. Martini, G. Fanizzi, G. Bencivenni, L. Tortora, V. V. Kulikov, I. Balwierz, A. De Santis, Paweł Moskal, F. Archilli, G. Giardina, M. Martemianov, F. Nguyen, G. Felici, L. Caldiera Balkestahl, A. Passeri, Magnus Wolke, F. Loddo, Vincenzo Patera, Andrzej Kupsc, A. Sciubba, S. A. Bulychjev, M. Mascolo, F. Happacher, Marco Schioppa, R. Messi, T. Johansson, and V. Bocci

Subjects
Nuclear physics, Physics, Particle physics, Quantum decoherence, Upgrade, Dark matter
Abstract

The KLOE experiment has acquired an integrated luminosity greater than 2.5 fb^{-1} at the peak of ø-resonance on the e^{+]e^{-} DAΦNE collider in the Frascati National Laboratory (LNF). New data taking with the upgraded detector (KLOE-2) and DAΦNE should start in the end of 2011. Main modifications of the detector and new interaction region give a unique possibility to collect about 20 fb^{-1} in 3 years. The KLOE-2 wide scientific program which contains the experimental study of CP and CPT symmetries, quantum decoherence, γγ physics and search of the dark matter is presented and briefly discussed.

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