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903 results on '"E. Dané"'

1. Secondary scintillation yield from GEM electron avalanches in Image 1-Image 2 and Image 1-Image 2-isobutane for CYGNO — Directional Dark Matter search with an optical TPC

Author

F.D. Amaro, E. Baracchini, L. Benussi, S. Bianco, C. Capoccia, M. Caponero, D.S. Cardoso, G. Cavoto, A. Cortez, I.A. Costa, G. D'Imperio, E. Dané, G. Dho, F. Di Giambattista, E. Di Marco, F. Iacoangeli, H.P. Lima Júnior, G.S.P. Lopes, G. Maccarrone, R.D.P. Mano, R.R. Marcelo Gregorio, D.J.G. Marques, G. Mazzitelli, A.G. McLean, A. Messina, C.M.B. Monteiro, R.A. Nobrega, I.F. Pains, E. Paoletti, L. Passamonti, F. Petrucci, S. Piacentini, D. Piccolo, D. Pierluigi, D. Pinci, A. Prajapati, F. Renga, R. J.d.C. Roque, F. Rosatelli, A. Russo, G. Saviano, N.J.C. Spooner, R. Tesauro, S. Tomassini, S. Torelli, and J.M.F. dos Santos

Subjects
Secondary scintillation, Optical TPC, Rare event detection, Dark Matter, Directional Dark Matter, WIMP, Physics, QC1-999
Abstract

CYGNO is an international collaboration with the aim of operating a Image 3 optical time projection chamber (TPC) for directional Dark Matter (DM) searches and solar neutrino spectroscopy, to be deployed at the Laboratori Nazionali del Gran Sasso (LNGS). A Image 1/Image 2 (60/40) mixture is used, along with a triple Gas Electron Multiplier (GEM) cascade to amplify the ionisation signal. The scintillation produced in the electron avalanches is read out using a scientific complementary metal–oxide–semiconductor (sCMOS) camera. This solution has proven to provide very high sensitivity to interactions in the few Image 4 energy range. The inclusion of a hydrogen-based gas will offer an even lighter target, resulting in a more efficient energy transfer in a DM particle collision, and consequently, a lower detection threshold. Additionally, longer track lengths of light nuclear recoils are easier to detect with a clearer direction. However, the addition of such gas will contribute to quenching the scintillation, jeopardizing the TPC performance. In this work, we demonstrate the feasibility of adding 1% to 5% isobutane to the Image 1/Image 2 (60/40) mixture by measuring the respective absolute scintillation yield output. The overall scintillation produced in the charge avalanches is not drastically suppressed by quenching due to the isobutane addition. The presence of Penning transfer from excited He atoms to isobutane molecules increases the number of electrons in the avalanches, partially compensating for the loss of scintillation due to quenching. For the highest applied GEM voltage, the total number of photons produced in the avalanche per Image 4 deposited in the absorption region presents a decrease of only a factor of about three, from 2.30(20)×104 to 8.2(4)×103 Image 5, as the isobutane content increases from 0 to 5%. The quantification of the visible component of the scintillation shows that isobutane quenches both visible and ultraviolet (UV) photons emitted by Image 1/Image 2.

Published
2024
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2. The CYGNO/INITIUM experiment

Author

F. D. Amaro, E. Baracchini, L. Benussi , S. Bianco, C. Capoccia, M. Caponero, D. Santos Cardoso, G. Cavoto, A. Cortez, I. A. Costa, E. Dané, G. Dho, F. Di Giambattista, E. Di Marco, G. D’Imperio, F. Iacoangeli, H. P. L. Jùnior, G. S. P. Lopes, G. Maccarrone, R. D. P. Mano, R. R. M. Gregorio, D. J. G. Marques, G. Mazzitelli, A. G. McLean, A. Messina, C. M. B. Monteiro, R. A. Nobrega, I. Fonseca Pains, E. Paoletti, L. Passamonti, S. Pelosi, F. Petrucci, S. Piacentini, D. Piccolo, D. Pierluigi, D. Pinci, A. Prajapati, F. Renga, R. J. C. Roque, F. Rosatelli, A. Russo, J. M. F. dos Santos, G. Saviano, N. J. C. Spooner, R. Tesauro, S. Tommasini, S. Torelli

Subjects
Physics, QC1-999
Abstract

The CYGNO project for the development of a high precision optical readout gaseous TPC for directional Dark Matter search and solar neutrino spectroscopy will be presented. It is to be hosted at Laboratori Nazionali del Gran Sasso. CYGNO peculiar features are the use of sCMOS cameras and PMTs coupled to GEMs amplification of a helium-based gas mixture at atmospheric pressure, in order to achieve 3D tracking with head tail capability and background rejection down to O(keV) energy, to boost sensitivity to low WIMP masses. The latest R&D results within the CYGNO project will be discussed along with the underground installation and operation of a 50 l prototype, soon to be followed by a O(1) m3 experiment demonstrator in 2024-2026. The latest results on the negative ion drift operation at atmospheric pressure within CYGNO optical readout approach will be illustrated, which is the aim of the ERC Consolidator Grant project INITIUM.

Published
2023
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3. Performance of the LHCb muon system

Author

Alves Jr, A. A., Anderlini, L., Anelli, M., Nobrega, R. Antunes, Auriemma, G., Baldini, W., Bencivenni, G., Berutti, R., Bizzeti, A., Bocci, V., Bondar, N., Bonivento, W., Botchin, B., Cadeddu, S., Campana, P., Carboni, G., Cardini, A., Carletti, M., Ciambrone, P., De Capua, E. Dané S., De Leo, V., Deplano, C., De Simone, P., Dettori, F., Falabella, A., Rodriguez, F. Ferreira, Frosini, M., Furcas, S., Furfaro, E., Graziani, G., Gruber, L., Haefeli, G., Kashchuk, A., Iacoangeli, F., Lai, A., Lanfranchi, G., Lenzi, M., Mair, O. Levitskaya K., Maev, O., Manca, G., Mara, M., Martellotti, G., Rodrigues, A. Massafferri, Messi, R., Murtas, F., Neustroev, P., Oldeman, R. G. C., Palutan, M., Passaleva, G., Penso, G., Pinci, D., Polycarpo, E., Raspino, D., Sabatino, G., Saitta, B., Salamon, A., Santacesaria, R., Santovetti, E., Saputi, A., Sarti, A., Satriano, C., Satta, A., Savrié, M., Schmidt, B., Schneider, T., Sciascia, B., Sciubba, A., Serra, N., Shatalov, P., Vecchi, S., Veltri, M., Volkov, S., and Vorobyev, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The performance of the LHCb Muon system and its stability across the full 2010 data taking with LHC running at ps = 7 TeV energy is studied. The optimization of the detector setting and the time calibration performed with the first collisions delivered by LHC is described. Particle rates, measured for the wide range of luminosities and beam operation conditions experienced during the run, are compared with the values expected from simulation. The space and time alignment of the detectors, chamber efficiency, time resolution and cluster size are evaluated. The detector performance is found to be as expected from specifications or better. Notably the overall efficiency is well above the design requirements, Comment: JINST_015P_1112 2013

Published
2012
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4. Measurement of the running of the fine structure constant below 1 GeV with the KLOE detector

Author

A. Anastasi, D. Babusci, G. Bencivenni, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwiński, G. D'Agostini, E. Dané, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, R. Di Salvo, D. Domenici, A. D'Uffizi, A. Fantini, G. Felici, S. Fiore, A. Gajos, P. Gauzzi, G. Giardina, S. Giovannella, E. Graziani, F. Happacher, L. Heijkenskjöld, T. Johansson, D. Kamińska, W. Krzemien, A. Kupsc, S. Loffredo, P.A. Lukin, G. Mandaglio, M. Martini, M. Mascolo, R. Messi, S. Miscetti, G. Morello, D. Moricciani, P. Moskal, M. Papenbrock, A. Passeri, V. Patera, E. Perez del Rio, A. Ranieri, P. Santangelo, I. Sarra, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, L. Tortora, G. Venanzoni, W. Wiślicki, and M. Wolke

Subjects
Vacuum polarization, α running, Physics, QC1-999
Abstract

We have measured the running of the effective QED coupling constant α(s) in the time-like region 0.6

Published
2017
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6. Upper limit on the η → π + π − branching fraction with the KLOE experiment

Author

S. Miscetti, E. P. Solodov, A. Di Cicco, E. Perez del Rio, Tord Johansson, R. Messi, D. Domenici, W. Wislicki, V. De Leo, S. Giovannella, S. Parzych, Marco Schioppa, F. Bossi, Aleksander Gajos, M. Martini, Filippo Ceradini, Magnus Wolke, P. Gauzzi, B. Cao, A. D'Uffizi, A. De Santis, V. L. Ivanov, A. Di Domenico, E. De Lucia, X. Kang, M. Berlowski, Wojciech Krzemien, E. Dané, Michał Silarski, G. Venanzoni, P. Fermani, Eryk Czerwiński, Vincenzo Patera, Andrzej Kupsc, P. Branchini, Paolo Ciambrone, A. Selce, Antonio Budano, A. Fantini, Paolo Santangelo, P.A. Lukin, D. Kisielewska-Kamińska, C. Bloise, S. Fiore, E. Graziani, D. Babusci, D. Moricciani, E.A. Kozyrev, P. De Simone, Giuseppe Mandaglio, L. Tortora, Florin Sirghi, Paweł Moskal, A. Passeri, F. Curciarello, G. D'Agostini, Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D'Agostini, G., Dane, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, A., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Parzych, S., Passeri, A., Patera, V., Perez del Rio, E., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., and Wolke, M.

Subjects
Nuclear and High Energy Physics, Meson, +, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Subatomär fysik, Experiment, 0103 physical sciences, Subatomic Physics, Radiative transfer, Invariant mass, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Limit (mathematics), 010306 general physics, Nuclear Experiment, Settore FIS/01, Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Branching fraction, e, e(+)-e(-) Experiments, −, e +-e − Experiments, CP violation, Experiments, Rare decay, lcsh:QC770-798, High Energy Physics::Experiment
Abstract

Based on an integrated luminosity of 1.61 fb$^{-1}$ $e^+e^-$ collision data collected with the KLOE detector at DA$\Phi$NE, the Frascati $\phi$-factory, a search for the $P$- and $CP$-violating decay $\eta\to\pi^{+}\pi^{-}$ has been performed. Radiative $\phi\to\eta\gamma$ decay is exploited to access the $\eta$ mesons. No signal is observed in the $\pi^{+}\pi^{-}$ invariant mass spectrum, and the upper limit on the branching fraction at 90\% confidence level is determined to be ${\mathcal B}(\eta\to\pi^{+}\pi^{-}), Comment: 11 pages, 3 figures

Published
2020

7. 50 litres TPC with sCMOS-based optical readout for the CYGNO project

Author

G. Mazzitelli, F. Amaro Domingues, E. Baracchini, L. Benussi, S. Bianco, C. Capoccia, M. Caponero, D. Santos Cardoso, G. Cavoto, A. Cortez, I. Abritta Costa, E. Dané, G. Dho, F. Di Giambattista, E. Di Marco, G. D’Imperio, F. Iacoangeli, H. Pessoa Lima Júnior, G. Sebastiao Pinheiro Lopes, G. Maccarrone, R. Daniel Passos Mano, R. Renz Marcelo Gregorio, D. José Gaspar Marques, A. Gregor McLean, A. Messina, C. Maria Bernardes Monteiro, R. Antunes Nobrega, I. Fonseca Pains, E. Paoletti, L. Passamonti, S. Pelosi, F. Petrucci, S. Piacentini, D. Piccolo, D. Pierluigi, D. Pinci, A. Prajapati, F. Renga, C. Riggio, A. Rodano, R. Joana da Cruz Roque, F. Rosatelli, A. Russo, J. Marques Ferreira dos Santos, G. Saviano, N. John Curwen Spooner, R. Tesauro, S. Tomassini, S. Torelli, and D. Tozzi

Subjects
Nuclear and High Energy Physics, dark matter, time projection chamber, CMOS camera, Instrumentation
Published
2022

8. Measurement of the branching fraction for the decay KS → πμν with the KLOE detector

Author

R. Messi, Filippo Ceradini, A. Selce, Florin Sirghi, E. P. Solodov, T. Johansson, Vincenzo Patera, P.A. Lukin, Andrzej Kupsc, G. Venanzoni, P. Fermani, Paolo Ciambrone, Paweł Moskal, E. Dané, S. Parzych, S. Giovannella, Aleksander Gajos, D. Kisielewska-Kamińska, P. De Simone, D. Moricciani, Antonio Budano, E.A. Kozyrev, V. De Leo, Michał Silarski, Wojciech Krzemien, M. Berlowski, Magnus Wolke, P. Gauzzi, A. Di Domenico, P. Branchini, Paolo Santangelo, E. De Lucia, Wojciech Wiślicki, A. Passeri, M. Martini, D. Domenici, D. Babusci, A. De Santis, L. Tortora, Giuseppe Mandaglio, B. Cao, X. Kang, F. Curciarello, V. L. Ivanov, G. D'Agostini, A. Fantini, C. Bloise, E. Perez del Rio, S. Miscetti, F. Bossi, A. Di Cicco, Marco Schioppa, S. Fiore, E. Graziani, A. D'Uffizi, Eryk Czerwiński, Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D'Agostini, G., Dane, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, A., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Parzych, S., Passeri, A., Patera, V., Perez del Rio, E., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., and Wolke, M.

Subjects
Semileptonic decay, +, e, −, collisions, K, 0, meson, Nuclear and High Energy Physics, Meson, 01 natural sciences, Nuclear physics, 0103 physical sciences, e+e-,collisions, e+e, 010306 general physics, Physics, Settore FIS/01, Muon, Mass distribution, 010308 nuclear & particles physics, Branching fraction, Detector, lcsh:QC1-999, K0, mesons, Data control, High Energy Physics::Experiment, e+e− collisions, K0 meson, semileptonic decay, lcsh:Physics, collision
Abstract

Based on a sample of 300 million KS mesons produced in ϕ→KLKS decays recorded by the KLOE experiment at the DAΦNE e+e− collider we have measured the branching fraction for the decay KS→πμν. The KS mesons are identified by the interaction of KL mesons in the detector. The KS→πμν decays are selected by a boosted decision tree built with kinematic variables and by a time-of-flight measurement. Signal efficiencies are evaluated with data control samples of KL→πμν decays. A fit to the reconstructed muon mass distribution finds 7223±180 signal events. Normalising to the KS→π+π− decay events the result for the branching fraction is B(KS→πμν)=(4.56±0.11stat±0.17syst)×10−4. It is the first measurement of this decay mode and the result allows an independent determination of |Vus| and a test of the lepton-flavour universality.

Published
2020

9. Characterization of a 5 <tex-math notation='LaTeX'>$5 \times 5$</tex-math> LYSO Matrix Calorimeter Prototype

Author

V. Tereshchenko, M. Cordelli, V. V. Glagolev, G. Tassielli, P. Ott, E. Dané, D. G. Hitlin, G. Corradi, S. Miscettti, M. Martini, S. Giovannella, Yu.I. Davydov, S.R. Soleti, A. Saputi, V. A. Baranov, Luca Morescalchi, F. Happacher, Gianantonio Pezzullo, N. Atanov, T. S. Miyashita, Andy Thomas, K. T. Flood, I. Sarra, and F. Colao

Subjects
Physics, Nuclear and High Energy Physics, Photon, 010308 nuclear & particles physics, Resolution (electron density), Electron, Characterization (mathematics), 01 natural sciences, Lyso, Calorimeter, Nuclear physics, Matrix (mathematics), Nuclear Energy and Engineering, 0103 physical sciences, Electrical and Electronic Engineering, Atomic physics, 010306 general physics, Energy (signal processing)
Abstract

In this paper, we present measurements of the energy and the time resolution of the Lutetium–Yttrium Oxyorthosilicate (LYSO) calorimeter prototype for the Mu2e experiment. The prototype calorimeter matrix consisted of 25, $\hbox{3}\,\hbox{$\times$}\, \hbox{3}\,\hbox{$\times$}\, \hbox{130\ mm}^3$ , LYSO crystals readout by $10\ \times 10\ \hbox{mm}^2$ Hamamatsu APDs. The prototype has been tested both with the tagged photon beam at MAMI, Mainz, Germany, and with the ${e^ -}$ beam of BTF, Frascati. The energy of particles used ranges between 61.3 and 187.1 MeV (80–130 MeV) for photon (electron) beams. While the MAMI data shows a negligible beam energy spread, we observe a 3%–5% contribution related to the beam in BTF sample. After correcting this effect, we obtain a global energy dependence of the energy resolution described by the formula ${\sigma _{E}}/{{E}_{{\rm {dep}}}}= {a}/\sqrt {{{E}_{{\rm {dep}}}}/{\hbox{GeV}}} \oplus {b}$ , with ${a} = ({0.59} \pm {0.12})\%$ and ${b} = ({3.63} \pm {0.21})\% $ . The simulation is in good agreement with data if we add an additional contribution due to the intrinsic LYSO fluctuation of 2.6%. We present also the measurements of the time resolution. The measurements have been performed using the ${e^ -}$ beam BTF in the energy range from 100 to 400 MeV. A resolution of ( ${161} \pm {3}$ ) ps at 100 MeV has been achieved. The energy dependence of the resolution has been fitted with following parametrization: ${\sigma _{\rm t}}{\rm (E)} = {a}/\sqrt {{E}/{\hbox{GeV}}} \oplus {b}$ , where the stochastic term and the constant term are determined to be ${a} = ({50} \pm {1})$ ps and ${b} = ({40} \pm {3})$ ps, respectively.

Published
2016

10. Combination of KLOE σ (e+e− → π+π−γ(γ)) measurements and determination of $$ {a}_{\mu}^{\pi^{+}{\pi}^{-}} $$ in the energy range 0.10 < s < 0.95 GeV2

Author

Paolo Santangelo, G. Venanzoni, P. Fermani, A. Passeri, Antonio Budano, N. Raha, E. P. Solodov, V. De Leo, P. A. Lukin, L. Tortora, Magnus Wolke, Stefan E. Müller, Michał Silarski, E. A. Kozyrev, Florin Sirghi, Wojciech Krzemien, D. Moricciani, S. Loffredo, P. Branchini, Aleksander Gajos, A. De Santis, Paweł Moskal, Gianfranco Morello, Filippo Ceradini, W. Wislicki, A. Selce, A. Keshavarzi, G. D'Agostini, E. Dané, M. Berlowski, S. Miscetti, A. Di Domenico, V. L. Ivanov, Vincenzo Patera, Andrzej Kupsc, Thomas Teubner, R. Messi, T. Johansson, B. Cao, Paolo Ciambrone, Marco Schioppa, D. Kisielewska-Kamińska, F. Bossi, G. Fantini, S. Giovannella, D. Domenici, P. De Simone, C. Bloise, Giuseppe Mandaglio, M. Martini, E. De Lucia, X. Kang, A. Fantini, D. Babusci, P. Gauzzi, A. Anastasi, A. D'Uffizi, E. Perez del Rio, Eryk Czerwiński, L. Caldeira Balkeståhl, Francesca Curciarello, S. Fiore, E. Graziani, A. Di Cicco, and Fiore, S.

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, e+-e- Experiments, Muon, Anomalous magnetic dipole moment, 010308 nuclear & particles physics, Hadron, State (functional analysis), Covariance, 01 natural sciences, 0103 physical sciences, Anomaly (physics), 010306 general physics, Energy (signal processing)
Abstract

The three precision measurements of the cross section σ(e + e − → π + π −γ(γ)) using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of these measurements requires covariance matrices that fully describe the correlations. We present the construction of these covariance matrices and use them to determine a combined KLOE measurement for σ(e + e − → π + π −γ(γ)). We find, from this combination, a two-pion contribution to the muon magnetic anomaly in the energy range 0.10 < s < 0.95 GeV2 of $$ {a}_{\mu}^{\pi^{+}{\pi}^{-}}=\left(489.8\pm {1.7}_{\mathrm{stat}}\pm {4.8}_{\mathrm{sys}}\right)\times {10}^{-10} $$ a μ π + π − = 489.8 ± 1.7 stat ± 4.8 s y s × 10 − 10 . Data vectors and covariance matrices are available at http://www.lnf.infn.it/kloe/ppg/ ppg_2017/ppg_2017.html.

Published
2018

11. The Mu2e Calorimeter Final Technical Design Report

Author

G. Tassielli, S. Ceravolo, G. Corradi, M. Martini, Tommaso Radicioni, I. Sarra, P. Murat, Ren-Yuan Zhu, K. T. Flood, F. C. Porter, V. A. Baranov, R. Donghia, V. Tereshchenko, S. Miscetti, F. Grancagnolo, E. Dané, F. Spinella, M. Cordelli, Z. Usubov, D. G. Hitlin, N. Atanov, E. Diociaiuti, T. S. Miyashita, S. Giovannella, V. Glagolev, F. Raffaelli, D. Pasciuto, S. Donati, Y. I. Davydov, Gianantonio Pezzullo, F. Colao, B. Echenard, M. Ricci, F. Happacher, Luca Morescalchi, A. Saputi, S. Di Falco, J. Budagov, D. Tagnani, and F. Cervelli

Subjects
Calorimeter (particle physics), APDS, Computer science, business.industry, Electrical engineering, Avalanche photodiode, Technical design, law.invention, Silicon photomultiplier, Backup, law, Mu2e, Fermilab, business
Abstract

Since the first version of the Mu2e TDR released at the beginning of 2015, the Mu2e Calorimeter system has undergone a long list of changes to arrive to its final design. These changes were primarily caused by two reasons: (i) the technology choice between the TDR proposed solution of BaF2 crystals readout with solar blind Avalanche Photodiodes (APDs) and the backup option of CsI crystals readout with Silicon Photomultipliers (SiPM) has been completed and (ii) the channels numbering, the mechanical system and the readout electronics were substantially modified while proceeding with engineering towards the final project. This document updates the description of the calorimeter system adding the most recent engineering drawings and tecnical progresses.

Published
2018

12. Combined limit on the production of a light gauge boson decaying into mu(+) mu(-) and pi(+) pi(-)

Author

P.A. Lukin, E. P. Solodov, E. Perez del Rio, A. D'Uffizi, D. Kisielewska-Kamińska, Michał Silarski, Filippo Ceradini, Paolo Ciambrone, G. Venanzoni, P. Fermani, V. L. Ivanov, P. De Simone, Paweł Moskal, A. De Santis, R. Messi, T. Johansson, G. Fantini, Eryk Czerwiński, E. Dané, Francesca Curciarello, D. Domenici, S. Giovannella, F. Bossi, Antonio Budano, C. Bloise, A. Anastasi, L. Tortora, A. Selce, Marco Schioppa, A. Di Domenico, Giuseppe Mandaglio, Magnus Wolke, P. Gauzzi, S. Miscetti, X. Kang, D. Babusci, N. Raha, A. Fantini, V. De Leo, Florin Sirghi, Vincenzo Patera, Andrzej Kupsc, Wojciech Krzemien, P. Branchini, E. De Lucia, M. Martini, Paolo Santangelo, D. Moricciani, G. D'Agostini, E.A. Kozyrev, A. Di Cicco, A. Passeri, S. Fiore, E. Graziani, Wojciech Wiślicki, M. Berlowski, B. Cao, Aleksander Gajos, Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., D'Agostini, G., Danè, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kamińska, D., Kozyrev, E. A., Krzemien, W., Kupsc, A., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Passeri, A., Patera, V., Perez del Rio, E., Raha, N., Santangelo, P., Schioppa, M., Selce, Andrea, Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wiślicki, W., and Wolke, M.

Subjects
Nuclear and High Energy Physics, Dark forces, e(+) e(-) Collisions, High Energy Physics::Lattice, Electron–positron annihilation, Hadron, Radiation, 01 natural sciences, e+e− Collision, Dark photon, High Energy Physics - Experiment, Subatomär fysik, High Energy Physics::Theory, e+e- Collisions, Dark forces. Gauge vector boson, Upper limits, Astronomi, astrofysik och kosmologi, 0103 physical sciences, Subatomic Physics, Astronomy, Astrophysics and Cosmology, Limit (mathematics), e + e − Collisions, Gauge vector boson, Upper limits, 010306 general physics, Condensed Matter::Quantum Gases, Coupling constant, Physics, Gauge boson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Settore FIS/01 - Fisica Sperimentale, Upper limit, Fine-structure constant, lcsh:QC1-999, Dark force, High Energy Physics::Experiment, Atomic physics, lcsh:Physics
Abstract

We searched for the $\mu^+\mu^-$ decay of a light vector gauge boson, also known as dark photon, in the $e^+ e^- \to \mu^+ \mu^- \gamma_{\rm ISR}$ process by means of the Initial State Radiation (ISR) method. We used 1.93~fb$^{-1}$ of data collected by the KLOE experiment at the DA$\Phi$NE $\phi$-factory. No structures have been observed over the irreducible $\mu^+ \mu^-$ background. A 90\% CL limit on the ratio $\varepsilon^2=\alpha^{\prime}/\alpha$ between the dark coupling constant and the fine structure constant of $ 3\times 10^{-6}-2\times 10^{-7}$ has been set in the dark photon mass region between 519 MeV and 973 MeV. This new limit has been combined with the published result obtained investigating the hypothesis of the dark photon decaying into hadrons in $e^+ e^- \to \pi^+ \pi^- \gamma_{\rm ISR}$ events. The combined 90\% CL limit increases the sensitivity especially in the $\rho-\omega$ interference region and excludes $\varepsilon^2$ greater than $(13-2)\times 10^{-7}$. For dark photon masses greater than 600 MeV the combined limit is lower than 8~$\times\, 10^{-7}$ resulting more stringent than present constraints from other experiments., Comment: 7 pages, 9 figures, 1 table, accepted for publication in Physics Letters B

Published
2018

13. Limit on the production of a low-mass vector boson ine+e−→Uγ,U→e+e−with the KLOE experiment

Author

B. Cao, A. Ranieri, M. Martini, M. Papenbrock, F. Bossi, C. Bloise, R. Messi, G. D'Agostini, E. Dané, T. Johansson, Wojciech Krzemien, Wojciech Wiślicki, A. Di Cicco, F. Sirghi, P. Branchini, Daria Kamińska, S. Miscetti, D. Domenici, V. De Leo, G. Bencivenni, S. Giovannella, Antonio Budano, P. De Simone, G. Venanzoni, A. Fantini, A. Anastasi, S. Fiore, S. Loffredo, E. Graziani, F. Curciarello, Filippo Ceradini, D. Babusci, A. D'Uffizi, Lena Heijkenskjöld, L. Tortora, F. Happacher, Paolo Ciambrone, W. Ikegami Andersson, D. Moricciani, Eryk Czerwiński, R. Di Salvo, A. De Santis, L. Caldeira Balkeståhl, I. Sarra, E. De Lucia, Giuseppe Mandaglio, Paweł Moskal, M. Mascolo, A. Di Domenico, Paolo Santangelo, A. Palladino, Michał Silarski, Vincenzo Patera, Andrzej Kupsc, Gianfranco Morello, G. Felici, Magnus Wolke, P. Gauzzi, A. Passeri, Aleksander Gajos, M. Berlowski, G. Giardina, Marco Schioppa, and E. Perez del Rio

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Physics beyond the Standard Model, Dark matter, 01 natural sciences, Dark photon, Vector boson, 0103 physical sciences, Production (computer science), Limit (mathematics), 010306 general physics, Low Mass
Abstract

The existence of a new force beyond the Standard Model is compelling because it could explain several striking astrophysical observations which fail standard interpretations. We searched for the li ...

Published
2015

14. The calorimeter of the Mu2e experiment at Fermilab

Author

S. Donati, Yu.I. Davydov, Bertrand Echenard, J. Budagov, S. Miscetti, F. Raffaelli, R. Donghia, A. Saputi, I. Sarra, Luca Morescalchi, V. Tereshchenko, Z. Usubov, F. Grancagnolo, M. Cordelli, G. F. Tassielli, E. Diociaiuti, V. Glagolev, S. Di Falco, F. Cervelli, F. Colao, Frank C. Porter, Ren-Yuan Zhu, G. Corradi, N. Atanov, M. Martini, E. Dané, F. Spinella, V. Baranov, D. G. Hitlin, S. Giovannella, K. T. Flood, Gianantonio Pezzullo, F. Happacher, Tommaso Radicioni, M. Ricci, T. S. Miyashita, P. Murat, Atanov, N., Baranov, V., Budagov, J., Cervelli, F., Colao, F., Cordelli, M., Corradi, G., Dané, E., Davydov, Y. I., Falco, S. Di, Diociaiuti, E., Donati, S., Donghia, R., Echenard, B., Flood, K., Giovannella, S., Glagolev, V., Grancagnolo, F., Happacher, F., Hitlin, D. G., Martini, M., Miscetti, S., Miyashita, T., Morescalchi, L., Murat, P., Pezzullo, G., Porter, F., Raffaelli, F., Radicioni, T., Ricci, M., Saputi, A., Sarra, I., Spinella, F., Tassielli, G., Tereshchenko, V., Usubov, Z., and Zhu, R. Y.

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Cosmic ray, Electron, 01 natural sciences, 7. Clean energy, Radiation-hard detector, Nuclear physics, Calorimeters, Radiation-hard detectors, Instrumentation, Mathematical Physics, 0103 physical sciences, Mu2e, Fermilab, 010306 general physics, Physics, Calorimeter, Muon, Calorimeter (particle physics), 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), Orders of magnitude (time), High Energy Physics::Experiment, Lepton
Abstract

The Mu2e experiment at Fermilab looks for Charged Lepton Flavor Violation (CLFV) improving by 4 orders of magnitude the current experimental sensitivity for the muon to electron conversion in a muonic atom. A positive signal could not be explained in the framework of the current Standard Model of particle interactions and therefore would be a clear indication of new physics. In 3 years of data taking, Mu2e is expected to observe less than one background event mimicking the electron coming from muon conversion. Achieving such a level of background suppression requires a deep knowledge of the experimental apparatus: a straw tube tracker, measuring the electron momentum and time, a cosmic ray veto system rejecting most of cosmic ray background and a pure CsI crystal calorimeter, that will measure time of flight, energy and impact position of the converted electron. The calorimeter has to operate in a harsh radiation environment, in a 10-4 Torr vacuum and inside a 1 T magnetic field. The results of the first qualification tests of the calorimeter components are reported together with the energy and time performances expected from the simulation and measured in beam tests of a small scale prototype., Comment: 11 pages, 7 figures, proceedings of 14th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD16) 3 - 6 October 2016 Siena, Italy, Journal of Instrumentation, Volume 12, January 2017 http://stacks.iop.org/1748-0221/12/i=01/a=C01061

Published
2017

15. Search for light vector boson production ine+e−→μ+μ−γinteractions with the KLOE experiment

Author

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

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle decay, Particle physics, Antiparticle, Electron–positron annihilation, Antimatter, High Energy Physics::Experiment, Elementary particle, Vector boson, Boson, Lepton
Abstract

We have searched for a light vector boson U, the possible carrier of a "dark force", with the KLOE detector at the DA Phi NE e(+)e(-) collider, motivated by astrophysical evidence for the presence of dark matter in the Universe. Using e(+)e(-) collisions collected with an integrated luminosity of 239.3 pb(-1), we look for a dimuon mass peak in the reaction e(+)e(-) -> mu(+)mu(-)gamma, corresponding to the decay U -> mu(+)mu(-). We find no evidence for a U vector boson signal. We set a 90% CL upper limit for the mixing parameter squared between the photon and the U boson of 1.6 x 10(-5) to 8.6 x 10(-7) for the mass region 520 < m(U) < 980 MeV.

Published
2014

16. 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

17. Precision measurement of σ(e+e−→π+π−γ)/σ(e+e−→μ+μ−γ) and determination of the π+π− contribution to the muon anomaly with the KLOE detector

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Muon, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, Form factor (quantum field theory), 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Lepton, Dimensionless quantity
Abstract

We have measured the ratio cr (e(+)e(-) -> pi(+)pi(-)gamma)/sigma(e(+)e(-) -> mu(+)mu(-)gamma), with the KLOE detector at DA Phi NE for a total integrated luminosity of similar to 240 pb(-1). From this ratio we obtain the cross section sigma (e(+)e(-) -> pi(+)pi(-)gamma). From the cross section we determine the pion form factor vertical bar F-pi vertical bar(2) and the two-pion contribution to the muon anomaly a(mu) for 0.592< M-pi pi < 0.975 GeV, Delta(pi pi) a(mu) = (385.1 +/- 1.1(stat) +/- 2.7(sys+theo)) x 10(-10). This result confirms the current discrepancy between the Standard Model calculation and the experimental measurement of the muon anomaly. (c) 2013 Elsevier B.V. All rights reserved.

Published
2013

18. Measurement of Γ(η→π+π−γ)/Γ(η→π+π−π0) with the KLOE detector

Author

D. Babusci, D. Badoni, I. Balwierz-Pytko, G. Bencivenni, C. Bini, C. Bloise, V. Bocci, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, G. Capon, F. Ceradini, P. Ciambrone, E. Czerwiński, E. Dané, E. De Lucia, G. De Robertis, A. De Santis, P. De Simone, A. Di Domenico, C. Di Donato, B. Di Micco, 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, M. Jacewicz, T. Johansson, A. Kupsc, J. Lee-Franzini, B. Leverington, F. Loddo, S. Loffredo, 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, G. Xu, and J. Zdebik

Subjects
Physics, Nuclear and High Energy Physics, Chiral perturbation theory, 010308 nuclear & particles physics, Gamma ray, Analytical chemistry, 01 natural sciences, Gamma gamma, Luminosity, 0103 physical sciences, Pi, High Energy Physics::Experiment, Invariant mass, Nuclear Experiment, 010306 general physics
Abstract

The ratio R-eta = Gamma(eta -> pi(+)pi(-)gamma)/Gamma(eta -> pi(+)pi(-)pi(0)) has been measured by analysing 22 million phi -> eta gamma decays collected by the KLOE experiment at DANE, corresponding to an integrated luminosity of 558 pb(-1). The eta -> pi(+)pi(-)gamma proceeds both via the rho resonant contribution, and possibly a non-resonant direct term, connected to the box anomaly. Our result, R-eta = 0.1856 +/- 0.0005(stat)+/- 0.0028(syst), points out a sizable contribution of the direct term to the total width. The di-pion invariant mass for the eta -> pi(+)pi(-)gamma decay could be described in a model-independent approach in terms of a(-) single free parameter, alpha. The determined value of the parameter alpha is alpha = (1.32 +/- 0.08(stat-0.09syst)(+0.10) +/- 0.02(theo)) GeV-2. 2012 Elsevier B.V. All rights reserved.

Published
2013

19. Energy and time resolution for a LYSO matrix prototype of the Mu2e experiment

Author

P. Ott, F. Colao, Gianantonio Pezzullo, T. S. Miyashita, F. Happacher, Andy Thomas, S. Giovannella, M. Martini, G. Corradi, Luca Morescalchi, Y. Davydov, M. Cordelli, G. F. Tassielli, K. T. Flood, V. A. Baranov, I. Sarra, S. Miscetti, N. Atanov, D. G. Hitlin, V. Tereshchenko, S.R. Soleti, A. Saputi, E. Dané, V. Glagolev, Atanov, N., Baranov, V., Colao, F., Cordelli, M., Corradi, G., Dané, E., Davydov, Yu. I., Flood, K., Giovannella, S., Glagolev, V., Happacher, F., Hitlin, D. G., Martini, M., Miscetti, S., Miyashita, T., Morescalchi, L., Ott, P., Pezzullo, G., Saputi, A., Sarra, I., Soleti, S. R., Tassielli, G., Tereshchenko, V., and Thomas, A.

Subjects
Scintillating crystal, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Electron, Calorimetry, 01 natural sciences, Lyso, High Energy Physics - Experiment, Nuclear physics, Matrix (mathematics), High Energy Physics - Experiment (hep-ex), Optics, 0103 physical sciences, Mu2e, Instrumentation, Nuclear and High Energy Physic, 010302 applied physics, Physics, Range (particle radiation), Calorimeter (particle physics), 010308 nuclear & particles physics, business.industry, Avalanche photodiode, Instrumentation and Detectors (physics.ins-det), Physics::Accelerator Physics, business, Energy (signal processing)
Abstract

We have measured the performances of a LYSO crystal matrix prototype tested with electron and photon beams in the energy range 60$-$450 MeV. This study has been carried out to determine the achievable energy and time resolutions for the calorimeter of the Mu2e experiment., 2 pages, 3 figures, 13th Pisa Meeting on Advanced Detectors

Published
2016

20. Measurement of the ϕ→π0e+e− transition form factor with the KLOE detector

Author

M. Berlowski, G. D'Agostini, E. Dané, A. D'Uffizi, Paolo Santangelo, G. Giardina, G. Felici, Wojciech Krzemien, Eryk Czerwiński, A. Passeri, L. Caldeira Balkeståhl, I. Sarra, F. Sirghi, P. Branchini, S. Loffredo, A. Fantini, A. Anastasi, Lena Heijkenskjöld, D. Moricciani, Antonio Budano, Filippo Ceradini, A. Di Cicco, L. Tortora, F. Happacher, Aleksander Gajos, W. Ikegami Andersson, S. Giovannella, Vincenzo Patera, R. Messi, T. Johansson, Daria Kamińska, Andrzej Kupsc, M. Papenbrock, V. De Leo, F. Bossi, E. De Lucia, Paolo Ciambrone, D. Domenici, R. Di Salvo, G. Venanzoni, Giuseppe Mandaglio, F. Curciarello, Wojciech Wiślicki, B. Cao, S. Fiore, E. Perez del Rio, E. Graziani, G. Bencivenni, Magnus Wolke, P. Gauzzi, Piotr Salabura, S. Miscetti, A. De Santis, P. De Simone, M. Mascolo, A. Di Domenico, Michał Silarski, Paweł Moskal, Gianfranco Morello, D. Babusci, Marco Schioppa, C. Bloise, A. Ranieri, M. Martini, Anastasi, A., Ceradini, Filippo, DI CICCO, Alessandro, Loffredo, Salvatore, and Fiore, S.

Subjects
Nuclear and High Energy Physics, Electron–positron annihilation, e+e− collisions, Transition form factor, 01 natural sciences, Conversion decay, E+e- collisions, High Energy Physics - Experiment, law.invention, Nuclear physics, Subatomär fysik, e(+)e(-) collisions, law, 0103 physical sciences, Subatomic Physics, 010306 general physics, Collider, E+e- collision, Settore FIS/01, Physics, 010308 nuclear & particles physics, Branching fraction, Detector, Form factor (quantum field theory), Pseudoscalar, High Energy Physics - Phenomenology, Transition form factors, electron positron collider, KLOE experiment, High Energy Physics::Experiment
Abstract

A measurement of the vector to pseudoscalar conversion decay $\phi \to \pi^0 e^+e^-$ with the KLOE experiment is presented. A sample of $\sim 9500$ signal events was selected from a data set of 1.7 fb$^{-1}$ of $e^+e^-$ collisions at $\sqrt{s} \sim m_{\phi}$ collected at the DA$\Phi$NE $e^+e^-$ collider. These events were used to obtain the first measurement of the transition form factor $| F_{\phi \pi^0}(q^2) |$ and a new measurement of the branching ratio of the decay: $\rm{BR}\,(\phi \to \pi^0 e^+e^-) = (\,1.35 \pm 0.05^{\,\,+0.05}_{\,\,-0.10}\,) \times 10 ^{-5}$. The result improves significantly on previous measurements and is in agreement with theoretical predictions., Comment: 13 pages, 4 figures; matches published version

Published
2016

21. Design and status of the Mu2e electromagnetic calorimeter

Author

Luca Morescalchi, R. Donghia, V. Tereshchenko, T. S. Miyashita, F. Colao, D. Pasciuto, M. Cordelli, G. F. Tassielli, I. Sarra, B. Echenard, P. Murat, F. C. Porter, V. A. Baranov, N. Atanov, D. G. Hitlin, S. Donati, S.R. Soleti, A. Saputi, Z. Usubov, M. Martini, R. Carosi, S. Di Falco, F. Cervelli, Gianantonio Pezzullo, Ren-Yuan Zhu, G. Corradi, J. Budagov, F. Happacher, S. Giovannella, Yu.I. Davydov, E. Dané, V. Glagolev, F. Grancagnolo, K. T. Flood, S. Miscetti, F. Spinella, Atanov, N., Baranov, V., Budagov, J., Carosi, R., Cervelli, F., Colao, F., Cordelli, M., Corradi, G., Dané, E., Davydov, Yu. I., Di Falco, S., Donati, S., Donghia, R., Echenard, B., Flood, K., Giovannella, S., Glagolev, V., Grancagnolo, F., Happacher, F., Hitlin, D. G., Martini, M., Miscetti, S., Miyashita, T., Morescalchi, L., Murat, P., Pasciuto, D., Pezzullo, G., Porter, F., Saputi, A., Sarra, I., Soleti, S. R., Spinella, F., Tassielli, G., Tereshchenko, V., Usubov, Z., and Zhu, R. Y.

Subjects
Scintillating crystal, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, APDS, Physics::Instrumentation and Detectors, Silicon photomultipliers, FOS: Physical sciences, Calorimetry, Silicon photomultiplier, 7. Clean energy, 01 natural sciences, Particle identification, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, Scintillating crystals, 0103 physical sciences, Mu2e, Fermilab, 010306 general physics, Instrumentation, Nuclear and High Energy Physic, Physics, Calorimeter (particle physics), 010308 nuclear & particles physics, Avalanche photodiodes, Avalanche photodiode, Instrumentation and Detectors (physics.ins-det), Lepton flavour violation
Abstract

The Mu2e experiment at Fermilab aims at measuring the neutrinoless conversion of a negative muon into an electron and reach a single event sensitivity of 2.5x10^{-17} after three years of data taking. The monoenergetic electron produced in the final state, is detected by a high precision tracker and a crystal calorimeter, all embedded in a large superconducting solenoid (SD) surrounded by a cosmic ray veto system. The calorimeter is complementary to the tracker, allowing an independent trigger and powerful particle identification, while seeding the track reconstruction and contributing to remove background tracks mimicking the signal. In order to match these requirements, the calorimeter should have an energy resolution of O(5)% and a time resolution better than 500 ps at 100 MeV. The baseline solution is a calorimeter composed of two disks of BaF2 crystals read by UV extended, solar blind, Avalanche Photodiode (APDs), which are under development from a JPL, Caltech, RMD consortium. In this paper, the calorimeter design, the R&D studies carried out so far and the status of engineering are described. A backup alternative setup consisting of a pure CsI crystal matrix read by UV extended Hamamatsu MPPC's is also presented., 5 pages, 6 figures

Published
2016
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22. Limit on the production of a new vector boson in e+e-→Uγ, U→π+π- with the KLOE experiment

Author

A. D'Uffizi, Aleksander Gajos, Eryk Czerwiński, L. Caldeira Balkeståhl, I. Sarra, A. De Santis, G. D'Agostini, E. Dané, B. Cao, A. Di Cicco, Wojciech Krzemien, V. De Leo, Filippo Ceradini, S. Loffredo, G. Venanzoni, M. Papenbrock, F. Bossi, D. Moricciani, F. Sirghi, D. Babusci, P. Branchini, G. Felici, F. Curciarello, C. Bloise, Paolo Ciambrone, M. Berlowski, R. Di Salvo, S. Fiore, A. Ranieri, E. Graziani, A. Fantini, S. Giovannella, S. Miscetti, L. Tortora, G. Giardina, Lena Heijkenskjöld, Paweł Moskal, Antonio Budano, M. Martini, A. Di Domenico, Michał Silarski, A. Passeri, Daria Kamińska, P. De Simone, D. Domenici, Wojciech Wiślicki, Gianfranco Morello, M. Mascolo, Magnus Wolke, P. Gauzzi, E. Perez del Rio, Marco Schioppa, F. Happacher, W. Ikegami Andersson, Vincenzo Patera, Andrzej Kupsc, E. De Lucia, Giuseppe Mandaglio, Paolo Santangelo, R. Messi, T. Johansson, A. Palladino, G. Bencivenni, A. Anastasi, Fiore, S., Anastasi, A., Ceradini, Filippo, DI CICCO, Alessandro, and Loffredo, Salvatore

Subjects
Particle physics, Nuclear and High Energy Physics, Dark forces, Photon, Electron–positron annihilation, Dark matter, U boson, Radiation, 01 natural sciences, Dark photon, Vector boson, Nuclear physics, Subatomär fysik, 0103 physical sciences, Subatomic Physics, 010306 general physics, Physics, Gauge boson, 010308 nuclear & particles physics, Branching fraction, Settore FIS/01 - Fisica Sperimentale, Dark force
Abstract

The recent interest in a light gauge boson in the framework of an extra U(1) symmetry motivates searches in the mass range below 1 GeV. We present a search for such a particle, the dark photon, in e + e − → U γ , U → π + π − based on 28 million e + e − → π + π − γ events collected at DAΦNE by the KLOE experiment. The π + π − production by initial-state radiation compensates for a loss of sensitivity of previous KLOE U → e + e − , μ + μ − searches due to the small branching ratios in the ρ – ω resonance region. We found no evidence for a signal and set a limit at 90% CL on the mixing strength between the photon and the dark photon, e 2 , in the U mass range between 527 and 987 MeV . Above 700 MeV this new limit is more stringent than previous ones.

Published
2016

23. Precision measurement of the η → π +π −π 0Dalitz plot distribution with the KLOE detector

Author

M. Papenbrock, F. Bossi, E. Perez del Rio, P. De Simone, A. Fantini, S. Loffredo, A. Di Cicco, Gianfranco Morello, C. Bloise, Lena Heijkenskjöld, R. Messi, S. Miscetti, T. Johansson, Paolo Santangelo, Filippo Ceradini, Marco Schioppa, A. Di Domenico, Antonio Budano, G. Venanzoni, A. De Santis, A. D'Uffizi, Aleksander Gajos, V. De Leo, Paweł Moskal, B. Cao, F. Curciarello, Michał Silarski, Eryk Czerwiński, D. Moricciani, Daria Kamińska, G. Bencivenni, L. Caldeira Balkeståhl, I. Sarra, E. De Lucia, Paolo Ciambrone, D. Domenici, M. Berlowski, W. Wislicki, Giuseppe Mandaglio, S. Fiore, A. Ranieri, M. Mascolo, E. Graziani, G. Giardina, M. Martini, L. Tortora, D. Babusci, F. Happacher, W. Ikegami Andersson, R. Di Salvo, S. Giovannella, A. Anastasi, Wojciech Krzemien, F. Sirghi, P. Branchini, G. Felici, G. D'Agostini, E. Dané, A. Passeri, Vincenzo Patera, Andrzej Kupsc, Magnus Wolke, P. Gauzzi, Fiore, S, Anastasi, A., Ceradini, Filippo, DI CICCO, Alessandro, and Loffredo, Salvatore

Subjects
e+-e- Experiment, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Dalitz plot, Electron positron collider, e plus -e- Experiments, QCD, 01 natural sciences, e plus -e- Experiments, QCD, Subatomär fysik, Nuclear physics, Subatomic Physics, 0103 physical sciences, Eta meson, 010306 general physics, Polynomial expansion, Settore FIS/01, Physics, Quantum chromodynamics, e+-e- Experiments, 010308 nuclear & particles physics, Detector, Charge (physics), 16. Peace & justice, Distribution (mathematics), Eta meson, Electron positron collider, KLOE experiment, KLOE experiment, Dimensionless quantity
Abstract

Using 1.6 fb−1 of e + e − → ϕ → ηγ data collected with the KLOE detector at DAΦNE, the Dalitz plot distribution for the η → π + π − π 0 decay is studied with the world’s largest sample of ∼ 4.7 · 106 events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables X and Y . The experiment is sensitive to all charge conjugation conserving terms of the expansion, including a gX 2 Y term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements.

Published
2016

24. Measurement of the front-end dead-time of the LHCb muon detector and evaluation of its contribution to the muon detection inefficiency

Author

Pierluigi Campana, M. Anelli, A. Chubykin, Rudolf Oldeman, B. Sciascia, Thomas Schneider, Oleg Maev, Celestina Satriano, E. Santovetti, M. Santimaria, Gaia Lanfranchi, Wander Baldini, Lucio Anderlini, B. Schmidt, Adalberto Sciubba, P. Ciambrone, Alessia Satta, A. Bizzeti, Giacomo Graziani, Giulia Tellarini, G. Passaleva, S. Cadeddu, A. Saputi, Emiliano Furfaro, P. Fresch, B. Bochin, G. Auriemma, A. Loi, Michele Veltri, Alessandro Sarti, D. Pinci, Andrey Vorobyev, Biagio Saitta, Roberta Santacesaria, Alessandro Cardini, G. Bencivenni, M. Carletti, Marianna Fontana, M. Palutan, W. Bonivento, S. Kotriakhova, L. Casu, R. Vazquez-Gomez, B. G. Siddi, P. De Simone, Giuseppe Martellotti, Adriano Lai, A. Kashchuk, Marco Fiore, F. Archilli, Giulia Manca, E. Dané, C. Bozzi, Gianni Penso, Antonio Falabella, Stefania Vecchi, P. Neustroev, Giovanni Carboni, Nikolay Bondar, G. Felici, Erica Polycarpo, D. Brundu, V. Bocci, and C. Vacca

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, 01 natural sciences, 030218 nuclear medicine & medical imaging, High Energy Physics - Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare, Front and back ends, Nuclear physics, 03 medical and health sciences, High Energy Physics - Experiment (hep-ex), 0302 clinical medicine, Muon spectrometer, 0103 physical sciences, Detectors and Experimental Techniques, Instrumentation, Mathematical Physics, Physics, Measurement method, Muon, Luminosity (scattering theory), 010308 nuclear & particles physics, Dead-time, drift chambers, drift tubes, Front-end electronics for detector readout, Gaseous detectors, Muon spectrometers, Particle tracking detectors (Gaseous detectors), proportional chambers etc), Thin-gap chambers, Wire chambers (MWPC, Instrumentation and Detectors (physics.ins-det), Dead time, Physics::Accelerator Physics, High Energy Physics::Experiment, Muon detector
Abstract

A method is described which allows to deduce the dead-time of the front-end electronics of the LHCb muon detector from a series of measurements performed at different luminosities at a bunch-crossing rate of 20 MHz. The measured values of the dead-time range from 70 ns to 100 ns. These results allow to estimate the performance of the muon detector at the future bunch-crossing rate of 40 MHz and at higher luminosity. A method is described which allows to deduce the dead-time of the front-end electronics of the LHCb muon detector from a series of measurements performed at different luminosities at a bunch-crossing rate of 20 MHz. The measured values of the dead-time range from ~ 70 ns to ~ 100 ns. These results allow to estimate the performance of the muon detector at the future bunch-crossing rate of 40 MHz and at higher luminosity. A method is described which allows to deduce the dead-time of the front-end electronics of the LHCb muon detector from a series of measurements performed at different luminosities at a bunch-crossing rate of 20 MHz. The measured values of the dead-time range from 70 ns to 100 ns. These results allow to estimate the performance of the muon detector at the future bunch-crossing rate of 40 MHz and at higher luminosity.

Published
2016

25. 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

26. Observation of the rare η→e+e−e+e− decay with the KLOE experiment

Author

E. De Lucia, R. Messi, Marco Schioppa, A. Di Domenico, Flavio Archilli, A. Ranieri, V. Bocci, Paweł Moskal, M. Martemianov, P. Massarotti, Vincenzo Patera, Andrzej Kupsc, C. Bloise, Stefan E. Müller, E. Iarocci, Barbara Sciascia, M. Martini, F. Ceradini, B. Di Micco, A. Sciubba, M. Napolitano, L. Tortora, Michał Silarski, P. De Simone, S. Meola, J. Lee-Franzini, P. Santangelo, G. Felici, O. Erriquez, D. Domenici, M. A. Matsyuk, Marek Jacewicz, I. Balwierz, Claudio Gatti, F. Bossi, I. Prado Longhi, Magnus Wolke, P. Gauzzi, F. Loddo, Gianfranco Morello, M. Moulson, A. De Santis, S. Miscetti, Simona Serena Bocchetta, S. A. Bulychjev, S. Giovannella, C. Di Donato, G. De Robertis, Antonio Budano, T. Spadaro, W. Wiślicki, D. Babusci, G. Venanzoni, G. Xu, R. Versaci, A. Denig, Pierluigi Campana, Davide Badoni, A. Passeri, P. Ciambrone, G. Bencivenni, G. De Zorzi, F. Ambrosino, T. Capussela, Massimo Antonelli, Eryk Czerwiński, I. Sarra, Cecilia Taccini, F. Happacher, Tord Johansson, A. Antonelli, S. Fiore, Bo Höistad, E. Graziani, P. Franzini, Cesare Bini, D. Moricciani, Jarosław Zdebik, E. Dané, G. Capon, M. Palutan, F. Gonnella, F. Nguyen, P. Branchini, M. Dreucci, G. Fanizzi, and V. V. Kulikov

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Radiation, 010306 general physics, 01 natural sciences
Abstract

We report the first observation of the rare η → e + e − e + e − ( γ ) decay based on 1.7 fb − 1 collected by the KLOE experiment at the DAΦNE ϕ-factory. The selection of the e + e − e + e − final state is fully inclusive of radiation. We have identified 362 ± 29 events resulting in a branching ratio of ( 2.4 ± 0.2 stat + bckg ± 0.1 syst ) × 10 − 5 .

Published
2011

27. First observation of B¯s0→Ds2⁎+Xμ−ν¯ decays

Author

H. J. Hilke, Z. Guzik, Alexey Vorobyev, U. Kerzel, T. du Pree, F. Jansen, R. B. Appleby, C. Deplano, T. E. Latham, C. Langenbruch, B. Storaci, G. Polok, I. Mous, M. Pepe Altarelli, Christine Mclean, Marco Gersabeck, C. Thomas, A.E. Bondar, P. Naik, M. Jahjah Hussein, E. Bos, P. Ilten, X. Cid Vidal, K. Müller, W. C. Zhang, T. M. Karbach, J. Anderson, J. F. J. van den Brand, P. M. Bjørnstad, M.I. Williams, Y. Xie, S. Kukulak, Andrew Smith, M. Nicol, James Keaveney, Simone Bifani, A. Sparkes, E. Dané, L. Zhang, P. Jaton, W. Witzeling, C. Barschel, Gianluigi Casse, Thomas Blake, O. Callot, I. Shapoval, Nicholas Adam Styles, A. Srednicki, M. Pappagallo, B. X. Liu, G. Wilkinson, G. Passaleva, D. Pinci, J. Panman, D. L. Perego, C. Matteuzzi, M. Shapkin, Y. Shcheglov, T. Kvaratskheliya, C. Iglesias Escudero, A. Sambade Varela, Tomasz Szumlak, S. TʼJampens, F. Xing, J. Luisier, V. Romanovsky, R. Jacobsson, S. Schleich, J. van Tilburg, P. Somogy, A. Arefyev, C. Eames, Werner Hofmann, E. Jans, V. Gibson, M. Frosini, S. Nies, G. Fardell, R. W. Lambert, Mikhail Zavertyaev, Roberta Cardinale, A. Kozlinskiy, A. Dovbnya, M. De Cian, M. van Beuzekom, T. Huse, Yu. Guz, I. V. Machikhiliyan, T. Ruf, A. Leflat, V. Niess, O. Steinkamp, A. Petrolini, A. Nawrot, G. J. Rogers, T. Skwarnicki, M. Liles, J. Moscicki, P. De Simone, G. Martellotti, E. Grauges, A. Solomin, G. Lanfranchi, M.-N. Minard, A. Vorobyev, S. Eidelman, P. Henrard, F. Machefert, B. Spaan, D. Martinez Santos, F. Blanc, J. Magnin, S. Löchner, M. Adinolfi, A. Chlopik, S. Basiladze, Jonas Rademacker, A. Massafferri, R. Lefèvre, Anatoly Konoplyannikov, P. Hunt, J. A. Hernando Morata, C. Ilgner, J. Albrecht, V. Talanov, W. D. Hulsbergen, A. Saputi, F. F. Jing, P. Morawski, W. Bonivento, G. Graziani, F. Soomro, E. Fanchini, P. Perret, O. Aquines Gutierrez, Sergey Barsuk, Roger Forty, P. F. Harrison, Kurt Rinnert, A. Keune, H. V. Cliff, H. P. Skottowe, Federico Alessio, W. Cameron, G. Haefeli, P. N. Y. David, J. Wang, E. Pauna, L. Zhong, K. Holubyev, A. Bates, F. Kruse, H. Ruiz, M. Orlandea, N. Neufeld, P. Collins, C. Parkes, B. DʼAlmagne, Roel Aaij, G. V. Ybeles Smit, A. Papanestis, A. Grecu, H. Gong, P. Vazquez Regueiro, J. H. Lopes, Dmitry Popov, A. Bursche, A P Ostankov, F. Teubert, G. Sabatino, S. Ricciardi, S. Redford, Y. Zhang, T. Britton, C. Salzmann, G. N. Patrick, F. Stagni, J. Mylroie-Smith, R. S. Huston, J. Lefrançois, G. D. Lafferty, Marco Cattaneo, J. Serrano, S. Koblitz, W. Da Silva, A. A. Affolder, M. Alexander, Agnieszka Oblakowska-Mucha, F. J. P. Soler, Christoph Frei, P. Schaack, S. Blusk, Anton Poluektov, Jan Buytaert, Pavel Shatalov, R. Märki, J. Amoraal, M. Korolev, W. Baldini, M. Plo Casasus, Th. Bauer, V. Matveev, Silvia Miglioranzi, Alessandro Camboni, Patrick Robbe, H. Degaudenzi, J. He, F. Constantin, K. Vervink, M. T. Tran, R. Schwemmer, J. Imong, M. Knecht, G. Manca, A. Satta, O. Schneider, J. G. Cogan, S. C. Haines, A. Hicheur, V. Shevchenko, C. Farinelli, E. Teodorescu, S. Stoica, E. Hicks, D. Lacarrere, M. Lieng, S. K. Paterson, S. Easo, R. Graciani Diaz, M. Tobin, T. Hampson, D. A. Milanes, C. Blanks, Neville Harnew, Plamen Hristov Hopchev, J. Libby, Patrick Koppenburg, Geraldine Conti, J. Dickens, M. Calvo Gomez, I. Raniuk, Francesco Dettori, N. H. Brook, A. M. Smith, M. Seco, Dmitry Golubkov, P. Campana, A. Borgia, R. Messi, A. Martín Sánchez, A. Bay, M. Matveev, C. Pavel, Karol Hennessy, Guoming Liu, A. Bobrov, G. Corti, G. McGregor, B. B. Shao, Zishuo Yang, C. Gaspar, M. Meissner, I. Videau, G. D. Patel, K. Wacker, Eduard Simioni, M. Palutan, Alessio Sarti, P. Sail, B. Adeva, G. H. Gong, M. O. Bettler, V. V. Gligorov, V. Rusinov, E. Tarkovskiy, E. Santovetti, A. Vollhardt, F. Murtas, F. Muheim, Sandro Cadeddu, J. Bressieux, F. De Lorenzi, S. A. Wotton, Biagio Saitta, Roland Bernet, M. P. Williams, S. Wandernoth, J. van Leerdam, G. Raven, D. Decamp, A. Golutvin, B. K. Pal, Christopher John Parkinson, M. Veltri, A. Büchler-Germann, F. Ferreira Rodrigues, I. DʼAntone, R. Plackett, M. Britsch, Howard Gordon, F. Eisele, J. Nardulli, K. Carvalho Akiba, Ph. Charpentier, M. Schmelling, J. L. Fungueirino Pazos, C. Satriano, L. Esteve, G. Auriemma, J. Wishahi, B. Souza De Paula, D. Galli, A. Contu, J. Visniakov, R. Harji, D. S. Bailey, Paolo Ciambrone, T. J. Gershon, Marina Artuso, I. De Bonis, F. Lehner, Li Li, Manuel Schiller, E. G. Zverev, M. Szczekowski, S. Borghi, Rudolf Oldeman, R. Antunes Nobrega, A. Semennikov, J. Garofoli, A. Gallas Torreira, Valery Pugatch, Elie Aslanides, C. Adrover, J. V. Morris, Andrea Bizzeti, S. De Capua, G. Penso, J. Palacios, A. Zhelezov, O. Maev, Sebastian Bachmann, B. Gui, R. Lindner, Nikolay Nikitin, M. Nedos, C. Bauer, B. Pie Valls, N. Chiapolini, V. Obraztsov, Y. N. Gao, Thomas Schneider, Stephan Eisenhardt, P. Gavillet, G. Carboni, S. Oggero, P. J. Clark, O. Leroy, D. van Eijk, D. E. Hutchcroft, V. Bocci, B. Maynard, Stephane Monteil, S. Gregson, C. Pauna, W. Flegel, S. Playfer, A. Pazos Alvarez, N. Gauvin, Phillip Urquijo, Mark Whitehead, O. Yushchenko, F. Maciuc, M. Frank, A. Pérez-Calero Yzquierdo, L. Carson, P. E. L. Clarke, A. C. dos Reis, V. Iakovenko, R. Muresan, A. A. Alves, Lars Eklund, Ziad Ajaltouni, C. Bozzi, K. Senderowska, S. Filippov, W. Reece, Ross D. Young, J. Cheng, P. J. Dornan, J. Closier, M. Ferro-Luzzi, J. Merkel, T. Brambach, B. Khanji, R. Dzhelyadin, A. Lai, M. Merkin, C. Patrignani, V. Tisserand, Hans Dijkstra, H. Voss, L. Wiggers, V. Egorychev, L. Garrido, F. F. Wilson, A. Gomes, B. Viaud, P. Gandini, R. J. Barlow, N. Sagidova, Marta Calvi, F. Dupertuis, P. Alvarez Cartelle, L. A. Granado Cardoso, Sandra Amato, K. Belous, C. DʼAmbrosio, C. Linn, P. Neustroev, A. Mazurov, B. Schmidt, Ivan Belyaev, S. Pozzi, M. Grabalosa Gándara, H. Brown, B. Mʼcharek, B. Bochin, D. Esperante Pereira, V. Fernandez Albor, R. Santacesaria, M. J. Charles, T. J. V. Bowcock, D.G. dʼEnterria, B. Jost, C. Coca, M. Benayoun, A. Tsaregorodtsev, S. Brisbane, S. Vecchi, E. Spiridenkov, J. Rouvinet, S. Donleavy, R. McNulty, Marco Clemencic, P. Krokovny, H. Terrier, Yasmine Amhis, G. Krocker, Nigel Smale, K. Wyllie, B. Pietrzyk, L. Shekhtman, M. Merk, A. Petrella, Victor Coco, Yongsun Kim, Nicola Serra, M. H. Schune, D. Savrina, L. Arrabito, A. Puig Navarro, J. P. Lees, Vladislav Balagura, U. Uwer, D. A. Roa Romero, L. Martin, P. Spradlin, D. R. Ward, U. Marconi, R. Vazquez Gomez, E. Lopez Asamar, P. Szczypka, M. Musy, R. M. D. Mamunur, G. Mancinelli, J. Christiansen, Mario Sannino, S. Steiner, L. Camilleri, D. Websdale, F. Fontanelli, M. Deissenroth, K. Kruzelecki, A. Powell, Andreas Alexander Maier, A. Ukleja, Rahul Kumar, V. N. La Thi, D. Wiedner, A. D. Webber, Antonio Pellegrino, T. G. Shears, Nikolay Bondar, O. Okhrimenko, Ph. Ghez, A. Sciubba, C. Rodriguez Cobo, J. Marks, G. A. Cowan, L. Li Gioi, E. Polycarpo, D. Voong, R. Le Gac, G. Bencivenni, J. M. Caicedo Carvajal, M. Witek, W. Qian, M. Needham, F. Kapusta, S. Stone, M. Gandelman, R. Santinelli, V. Fave, Dermot Moran, E. Gushchin, R. Nandakumar, D. Dossett, S. Perazzini, G. Valenti, S. Farry, J-C. Garnier, O. Shevchenko, E. Rodrigues, J. Blouw, L. De Paula, B. Jean-Marie, C. Potterat, N. Mangiafave, D. R. Johnson, C. R. Jones, N. Tuning, M. Agari, M. J.J. John, N. Lopez-March, B. Rakotomiaramanana, E. van Herwijnen, M. Patel, U. Trunk, E. Perez Trigo, A. Kashchuk, Z. Mathe, U. Egede, S. Topp-Joergensen, M. Kucharczyk, T. Gys, U. Straumann, Olivier Deschamps, J. J. Saborido Silva, Tjeerd Ketel, P. Rodriguez Perez, M. Savrie, S. Traynor, Y.Y. Li, Oleg Stenyakin, A. Martens, Xavier Vilasis-Cardona, Angelo Carbone, Jaap Velthuis, C. Fitzpatrick, L. Del Buono, M. Sapunov, S. Malde, M. Coombes, S. Furcas, B. Popovici, Ignacio Bediaga, J. Gassner, E. Thomas, T. Nakada, C. Färber, B. Muryn, L. Kravchuk, Alessandro Cardini, J. M. De Miranda, C. Göbel, Krzysztof Grzegorz Sobczak, G. Pessina, V. Vagnoni, A. Shires, Emilie Maurice, R. Currie, S. Hansmann-Menzemer, A. Schopper, R. Mountain, T. Lesiak, M.O. Dima, and Ming Zeng

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences
Published
2011

28. Measurement of σ(pp→bb¯X) at s=7 TeV in the forward region

Author

D. S. Bailey, C. Bozzi, K. Senderowska, Marta Calvi, F. Soomro, Bo Liu, S. Perazzini, Ivan Belyaev, S. Pozzi, H. Brown, B. Bochin, D. Esperante Pereira, V. Fernandez Albor, M. L. Woodward, S. Traynor, L. Garrido, G. Krocker, O. Callot, F. Kruse, Pavel Shatalov, A. Satta, Francesco Iacoangeli, Ulrik Egede, S. Basiladze, M. Alfonsi, C. Satriano, L. Esteve, G. Auriemma, A. Contu, F. Lehner, Olivier Leroy, E. G. Zverev, I. Shapoval, L. Shekhtman, J. Palacios, G. Fardell, S. Eidelman, Carmelo D'Ambrosio, Jaap Velthuis, M. Sapunov, E. Lopez Asamar, R. M. D. Mamunur, G. Moine, Conor Fitzpatrick, R. Santacesaria, S. Löchner, P. Henrard, F. Blanc, R. Lefèvre, Oleg Stenyakin, A. Kozlinskiy, A. Dovbnya, S. Malde, Victor Coco, A. Nawrot, D. Wiedner, A. D. Webber, R. Schwemmer, J. Imong, L. Del Buono, I. Kudryashov, N. Tuning, C. Pavel, E. Bonaccorsi, S. Ricciardi, S. Redford, Christoph Frei, J. Christiansen, A. Chlopik, Roger Forty, A. Keune, E. Santovetti, Mario Sannino, Albert Bursche, Silvia Borghi, G. Sabatino, Pavel Krokovny, H. J. Hilke, Z. Guzik, Patrick Koppenburg, Lei Zhang, Sandro Cadeddu, David D'Enterria, Stephen M. Stahl, M. Rosello, L. Li, N. Neufeld, D. L. Perego, G. J. Rogers, G. Graziani, David Gascon, C. Abellan Beteta, S. Steiner, Tjeerd Ketel, F. Constantin, C. Fournier, U. Kerzel, P. Morawski, W. Bonivento, F. Stagni, R. S. Huston, D. A. Roa Romero, P. Vazquez Regueiro, J. Magnin, Dmitry Popov, L. Camilleri, D. Websdale, X. Cid Vidal, F. Muheim, D. R. Ward, H. Degaudenzi, C. Blanks, J. Dickens, M. Calvo Gomez, Guoming Liu, A. Bobrov, G. Corti, Y. Zhang, M. Agari, T. J. V. Bowcock, K. Kruzelecki, T. E. Latham, Z. Mathe, Jan Buytaert, M. Plo Casasus, M. Coombes, S. Furcas, B. Popovici, Ignacio Bediaga, J. Gassner, Julien Cogan, C. Gaspar, A. Srednicki, M. Veltri, G. Haefeli, Jing Wang, A. Mazurov, Clive Barham, G. Manca, O. Schneider, R. Kristic, Marco Cattaneo, F. Fontanelli, M. Deissenroth, C. Thomas, Yu. Guz, V. Matveev, A. Powell, B. Rakotomiaramanana, S. Brisbane, J. F. J. van den Brand, F. Jansen, M. Savrie, F. Dupertuis, C. Göbel, Nikolay Bondar, A. Shires, A. Bates, G. D. Lafferty, C. Parkes, E. Pauna, Howard Gordon, F. Eisele, K. Wacker, E. Spiridenkov, M. Seco, P. Alvarez Cartelle, S. Kukulak, Krzysztof Grzegorz Sobczak, Simone Bifani, A P Ostankov, Anatoly Konoplyannikov, P. David, M. Nedos, A. Vollhardt, Marco Adinolfi, J. Panman, V. Gracco, P. Urquijo, Michael Alexander, W. Flegel, H. Voss, H. V. Cliff, Federico Alessio, G. Barber, J. Keaveney, E. Dané, G. Pessina, C. Deplano, Karol Hennessy, P. De Simone, Stephane T'Jampens, A. Comerma-Montells, O. Okhrimenko, Sandra Amato, A. Bondar, V. N. La Thi, A. Tsaregorodtsev, Matthew Needham, N. A. Smith, J. Nardulli, E. Maurice, G. Conti, J. Wishahi, J. Rouvinet, A. Grecu, Y.N. Gao, B. Jost, C. Coca, M. Benayoun, Ph. Ghez, A. Sciubba, K. Belous, M. Jahjah Hussein, Valery Pugatch, G. Polok, E. Perez Trigo, I. Mous, M. Charles, B. B. Shao, J. P. Lees, R. McNulty, Sheldon Stone, M. Korolev, R. Currie, H. Terrier, J. Bressieux, Yang Li, A. Sparkes, S. Easo, Colin Mclean, A. Martens, Adlène Hicheur, P. Hopchev, Bernardo Adeva, B. Schmidt, E. van Herwijnen, Giampiero Mancinelli, I. Videau, S. Donleavy, G. Valenti, B. Spaan, S. Hansmann-Menzemer, I. D'Antone, P. Campana, M. Szczekowski, T. Bellunato, A. Borgia, A. Schopper, J. Riera, V. Gibson, A. Zhelezov, Marco Clemencic, Nicholas Adam Styles, Simone Brusa, M. T. Tran, A. Büchler-Germann, A. A. Affolder, C. Linn, A. Papadelis, Nigel Smale, S. G. Katvars, D. Galli, J. Closier, Y. Bagaturia, A. Massafferri, Xavier Vilasis-Cardona, A. A. Maier, O. Steinkamp, L. Dwyer, T. Ruf, J. Anderson, S. Topp-Joergensen, K. Carvalho Akiba, Marina Artuso, P. Szczypka, M. Musy, B. Souza De Paula, K. Wyllie, B. Pietrzyk, J. A. Hernando Morata, W. Witzeling, M. Grabalosa Gándara, T. Lesiak, C. J. Parkinson, J. Libby, I. Raniuk, A. Petrolini, G. A. Cowan, M. P. Williams, Agnieszka Oblakowska-Mucha, A. Noor, T. Gys, Nikolay Nikitin, D. Piedigrossi, E. Tarkovskiy, Robert Appleby, T. M. Karbach, G. Wilkinson, Patrick Robbe, Hugh Philip Skottowe, F. Murtas, R. Nandakumar, G. Lanfranchi, M.-N. Minard, T. J. Gershon, A. Vorobyev, M. Patel, U. Trunk, R. Antunes Nobrega, A. Semennikov, M. Merk, J. J. Saborido Silva, Roel Aaij, G. V. Ybeles Smit, E. Thomas, J. van Tilburg, S. A. Wotton, A. Sambade Varela, K. Vervink, D. Dossett, A. Papanestis, Elie Aslanides, B. Chadaj, P. Rodriguez Perez, G. Martellotti, A. Solomin, C. Forti, Tariel Sakhelashvili, C. Färber, C. Langenbruch, K. Holubyev, Rudolf Oldeman, F. Teubert, P. E. L. Clarke, Marcin Kucharczyk, E. Hicks, Hans Dijkstra, A. Arefyev, J. Lefrançois, B. Storaci, B. Corajod, S. Poss, W. D. Hulsbergen, A. Kashchuk, D. Volyanskyy, B. M'charek, B. Muryn, E. Teodorescu, S. Stoica, L. Kravchuk, D. Savrina, L. Arrabito, Alessandro Cardini, J. M. De Miranda, E. Bos, A. Gallas Torreira, A. C. dos Reis, T. Hampson, R. Muresan, V. Tisserand, B. Khanji, V. Balagura, Lars Eklund, L. Brarda, M. Lenzi, D. R. Johnson, A. Petrella, L. Nicolas, W. Baldini, P. M. Bjørnstad, J. H. Lopes, C. R. Jones, Philip Ilten, Zishuo Yang, M. Palutan, M. Frosini, Kurt Rinnert, L. Martin, G. N. Patrick, Ziad Ajaltouni, M. O. Bettler, S. Nies, S. Gregson, P. Spradlin, Thomas Blake, Marc S. Williams, D. van Eijk, R. W. Lambert, B. K. Pal, R. Märki, J. Amoraal, Yongsun Kim, V. V. Gligorov, V. Rusinov, P. Loveridge, G. McGregor, Roberta Cardinale, Nicola Serra, O. Yushchenko, M. van Beuzekom, J. Mylroie-Smith, S. Blusk, A. Carbone, M. Shapkin, Gianni Penso, V. Vagnoni, J. Morant, J-C. Garnier, O. Jamet, T. Huse, Jibo He, P. Schaack, S. Sigurdsson, Y. Shcheglov, T. Kvaratskheliya, P. Sail, D. Moran, B. Viaud, A. A. Alves, N. Sagidova, Tomasz Szumlak, Alessandro Camboni, S. Oggero, J. Cheng, T. Brambach, S. Playfer, L. De Paula, O. Ullaland, R. Dzhelyadin, A. Lai, P.A. Cooke, F. Ferreira Rodrigues, M. Merkin, F. De Lorenzi, A. Pérez-Calero Yzquierdo, V. Iakovenko, U. Marconi, P. Naik, L. Li Gioi, R. Jacobsson, G. Felici, U. Straumann, W. Reece, D. Voong, Ph. Charpentier, R. Le Gac, S. Schleich, M. Poli-Lener, David Hutchcroft, R. Bernhard, R. Dumps, Olivier Deschamps, M. Knecht, J. Carroll, M. Witek, G. H. Gong, M. Schmelling, M. Nicol, B. Franek, G. Guerrer, L. Roy, T. Savidge, J. Rademacker, R. Lindner, Dmitry Golubkov, R. Messi, C. Bauer, F. Kapusta, C. Eames, J. L. Fungueirino Pazos, M. De Cian, Werner Hofmann, N. Lopez-March, C. Adrover, Johannes Albrecht, Thomas Schneider, P. Gavillet, Malcolm John, C. Iglesias Escudero, V. Romanovsky, M. Gandelman, R. Santinelli, V. Fave, Paolo Ciambrone, J. Blouw, Yuehong Xie, E. Gushchin, J. Serrano, V. Bocci, J. Marks, D. Martinez Santos, U. Uwer, A. Pazos Alvarez, J.H. Bibby, Paul Fraser Harrison, Andrea Bizzeti, S. Miglioranzi, B. Gui, D. Pinci, Mark Whitehead, A. Puig Navarro, B. Maynard, V. Egorychev, P. Neustroev, Roger Barlow, V. Shevchenko, C. Farinelli, G. Decreuse, L. Wiggers, F. F. Wilson, A. Bay, S. W. Lindsay, Th. S. Bauer, A. Gomes, L. A. Granado Cardoso, G. Raven, D. Decamp, A. Golutvin, N. H. Brook, R. Harji, N. Chiapolini, Sadia Khalil, G. Passaleva, F. Xing, J. Luisier, S. Filippov, M. Ferro-Luzzi, Eduardo Rodrigues, V. Niess, S. K. Paterson, E. Grauges, M. Britsch, S. Monteil, F. Machefert, W. Qian, C. Ilgner, Manuel Schiller, W. Cameron, H. Gong, A. C. Smith, F. J. P. Soler, R. Mountain, S. C. Haines, D. Lacarrere, M. Lieng, A. M. Smith, C. Matteuzzi, P. Hunt, Roland Bernet, E. Picatoste Olloqui, S. Wandernoth, M.O. Dima, P. Collins, Ming Zeng, C. Salzmann, R. Graciani Diaz, Neville Harnew, Alexey Vorobyev, T. du Pree, M. Pepe Altarelli, Marco Gersabeck, K. Müller, P. J. Clark, Ross D. Young, P. J. Dornan, Paolo Gandini, C. Patrignani, S. Farry, Gianluigi Casse, E. Rondan Sanabria, E. Jans, R. Vazquez Gomez, E. Fanchini, P. Perret, O. Aquines Gutierrez, Sergey Barsuk, H. Ruiz, M. Orlandea, S. Koblitz, Francesco Dettori, Biagio Saitta, J. Visniakov, I. De Bonis, M. Pappagallo, S. Vecchi, Yasmine Amhis, J. V. Morris, O. Maev, W. Da Silva, M. H. Schune, Tomasz Skwarnicki, Sebastian Bachmann, B. Pie Valls, A. Ukleja, V. Obraztsov, Stephan Eisenhardt, A. Gaspar De Valenzuela Cue, Antonio Pellegrino, C. Pauna, N. Gauvin, S. De Capua, C. Rodriguez Cobo, E. Polycarpo, Tatsuya Nakada, G. Bencivenni, J. M. Caicedo Carvajal, F. Maciuc, P. Jaton, P. Somogy, Giovanni Carboni, I. V. Machikhiliyan, J. Moscicki, Rajesh Kumar, Laurence Carson, C. J. Densham, Tara Shears, Markus Frank, Eduard Simioni, Anton Poluektov, Alexander Leflat, G. D. Patel, J. Merkel, Alessio Sarti, B. Jean-Marie, Christian Rummel, C. Potterat, B. D'Almagne, N. Mangiafave, and M. Tobin

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Muon, Meson, 010308 nuclear & particles physics, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, Sigma, 01 natural sciences, 7. Clean energy, Bottom quark, Nuclear physics, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract

Decays of b hadrons into final states containing a D0 meson and a muon are used to measure the b anti-b production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. In the pseudorapidity interval 2 < eta < 6 and integrated over all transverse momenta we find that the average cross-section to produce b-flavoured or anti-b-flavoured hadrons is (75.3 +/- 5.4 +/- 13.0) microbarns.

Published
2010

29. Prompt KS0 production in pp collisions at s=0.9 TeV

Author

G. Mancinelli, Conor Fitzpatrick, F. Constantin, S. Traynor, J. H. Lopes, C. Langenbruch, B. Storaci, S. Eidelman, P. Henrard, Mario Sannino, F. Blanc, R. Lefèvre, F. Kruse, G. Graziani, David Gascon, C. Abellan Beteta, S. Steiner, P. Vazquez Regueiro, Dmitry Popov, R. Kristic, Marco Cattaneo, E. Bos, R. Nandakumar, M. Seco, S. Blusk, G. Wilkinson, Angelo Carbone, L. Camilleri, C. Matteuzzi, A. Sambade Varela, Alessandro Camboni, K. Kruzelecki, Themistocles Bowcock, D. van Eijk, P. Loveridge, P. M. Bjørnstad, E. Maurice, Jaap Velthuis, Pavel Shatalov, O. Yushchenko, D. Dossett, J. Bressieux, Thomas Blake, A. A. Affolder, M. Sapunov, A. Satta, J. V. Morris, O. Maev, W. Da Silva, A. Arefyev, R. Santacesaria, O. Callot, P. David, V. N. La Thi, A. Tsaregorodtsev, Tomasz Skwarnicki, Kurt Rinnert, S. Farry, Gianluigi Casse, Francesco Iacoangeli, Ulrik Egede, Sheldon Stone, G. H. Gong, J. Anderson, Sebastian Bachmann, M. van Beuzekom, T. Huse, G. Fardell, B. Pie Valls, V. Obraztsov, M. Grabalosa Gándara, M. Frosini, S. Nies, A. A. Alves, J. L. Fungueirino Pazos, M. De Cian, Stephan Eisenhardt, R. W. Lambert, Lars Eklund, Marina Artuso, J. Mylroie-Smith, Jibo He, E. Perez Trigo, S. Malde, A. Kozlinskiy, A. Dovbnya, Marc S. Williams, Julien Cogan, S. Sigurdsson, E. Rondan Sanabria, E. Jans, P. Schaack, Roberta Cardinale, M. Coombes, A. Gaspar De Valenzuela Cue, J. Cheng, T. Brambach, J-C. Garnier, H. V. Cliff, Federico Alessio, G. Barber, C. Pauna, H. J. Hilke, A. Nawrot, G. J. Rogers, D. Vieira, P. Naik, Z. Guzik, E. Bonaccorsi, Paolo Ciambrone, J. Blouw, N. Gauvin, S. De Capua, F. Maciuc, Tara Shears, F. Jansen, Eduard Simioni, Anton Poluektov, S. Brisbane, E. Spiridenkov, L. De Paula, G. Felici, M. Poli-Lener, A. Ukleja, O. Ullaland, R. Dzhelyadin, A. Lai, P.A. Cooke, S. Löchner, L. Esteve, M. Schmelling, L. Li Gioi, D. Voong, S. Furcas, B. Popovici, Ignacio Bediaga, J. Gassner, J. Magnin, Illya Shapoval, A. Chlopik, Simone Brusa, M. T. Tran, Patrick Koppenburg, Lei Zhang, M. Merkin, Yu.V. Gilitsky, Andrea Bizzeti, S. Miglioranzi, A. Srednicki, Jordi Riera, J. Rouvinet, R. McNulty, H. Terrier, A. Papadelis, M. Nicol, E. Dané, V. Gibson, A. Bates, W. Witzeling, Tariel Sakhelashvili, S. Topp-Joergensen, A. Van Lysebetten, C. Deplano, Yongsun Kim, Roger Forty, Yu. Guz, Alexander Leflat, H. Gong, A. C. Smith, Nigel Smale, Nicola Serra, G. Polok, I. Mous, T. Ruf, G. Auriemma, A. Contu, F. Lehner, Olivier Leroy, E. G. Zverev, J. Palacios, Bo Liu, A. Keune, E. Santovetti, M. Pappagallo, G. Martellotti, A. Solomin, C. Forti, D. Moran, W. D. Hulsbergen, Ivan Belyaev, K. Wyllie, S. Pozzi, B. Pietrzyk, R. Le Gac, M. Witek, Hans Dijkstra, G. Krocker, Sandro Cadeddu, David D'Enterria, L. Shekhtman, E. Pauna, U. Marconi, T. Gys, G. Lanfranchi, M.-N. Minard, B. Viaud, P. De Simone, B. Spaan, J. Closier, Albert Bursche, Antonio Pellegrino, C. Iglesias Escudero, V. Romanovsky, G. Guerrer, F. Kapusta, E. Thomas, G. Moine, C. Färber, G. Sabatino, J. A. Hernando Morata, N. Sagidova, G. D. Patel, K. Wacker, Alessio Sarti, M. Merk, R. Dumps, A. Grecu, R. Vazquez Gomez, E. Fanchini, P. Perret, O. Aquines Gutierrez, Sergey Barsuk, H. Ruiz, M. Orlandea, Clive Barham, S. Koblitz, Francesco Dettori, A. Vorobyev, D. Piedigrossi, H. Brown, M. Knecht, F. J. P. Soler, B. Muryn, Roel Aaij, G. V. Ybeles Smit, M. Shapkin, F. Stagni, R. S. Huston, Y. Shcheglov, Bernardo Adeva, L. Roy, T. Savidge, C. Rodriguez Cobo, B. Bochin, D. Esperante Pereira, Dmitry Golubkov, R. Messi, D. Galli, H. Degaudenzi, S. C. Haines, M. Patel, U. Trunk, L. Kravchuk, Alessandro Cardini, A. Petrella, Christian Rummel, Victor Coco, T. J. Gershon, J. J. Saborido Silva, B. Gui, V. Fernandez Albor, A. Büchler-Germann, K. Carvalho Akiba, Jan Buytaert, I. D'Antone, Johannes Albrecht, Malcolm John, P. Rodriguez Perez, Elie Aslanides, J. M. De Miranda, M. Rosello, M. Nedos, A. Vollhardt, Michael Alexander, W. Flegel, D. Lacarrere, E. Polycarpo, Tatsuya Nakada, L. Dwyer, B. Maynard, C. J. Parkinson, M. Plo Casasus, M. Lieng, T. Kvaratskheliya, Tomasz Szumlak, G. Bencivenni, V. Matveev, D. Savrina, L. Arrabito, Anatoly Konoplyannikov, J. Visniakov, I. De Bonis, M. Szczekowski, M. Gandelman, Carmelo D'Ambrosio, Oleg Stenyakin, R. Santinelli, S. K. Paterson, T. Bellunato, P. Jaton, P. Somogy, Giovanni Carboni, I. V. Machikhiliyan, L. Brarda, A. M. Smith, J. M. Caicedo Carvajal, J. Libby, I. Raniuk, Patrick Robbe, A. A. Maier, Robert Appleby, V. Fave, J. Moscicki, B. Chadaj, R. Jacobsson, V. Bocci, A. Kashchuk, P. J. Clark, T. M. Karbach, L. Nicolas, L. Del Buono, S. Oggero, L. Martin, S. Schleich, M. P. Williams, Agnieszka Oblakowska-Mucha, F. Murtas, Laurence Carson, E. Teodorescu, David Hutchcroft, G. Decreuse, M. Tobin, K. Vervink, D. Pinci, E. Hicks, P. Spradlin, B. M'charek, E. Gushchin, Z. Ajaltouni, T. Hampson, S. A. Wotton, A. Papanestis, G. Rospabe, Roland Bernet, E. Picatoste Olloqui, S. Playfer, S. Stoica, D. Volyanskyy, V. Egorychev, Rudolf Oldeman, D. A. Roa Romero, S. Wandernoth, P. Neustroev, R. Antunes Nobrega, A. Semennikov, G. Passaleva, L. Wiggers, F. F. Wilson, Th. S. Bauer, A. Gomes, V. Gracco, M. Jahjah Hussein, A. Gallas Torreira, F. Metlica, F. Xing, J. Luisier, F. De Lorenzi, D. Wiedner, A. Noor, D. S. Bailey, D. R. Ward, V. Vagnoni, J. Morant, Zishuo Yang, B. Schmidt, M. Palutan, L. A. Granado Cardoso, C. Eames, Nikolay Nikitin, C. Bozzi, K. Senderowska, G. McGregor, C. Gaspar, U. Straumann, Ross D. Young, A. Pérez-Calero Yzquierdo, V. Iakovenko, Werner Hofmann, M. O. Bettler, Jing Wang, A. D. Webber, V. V. Gligorov, P. J. Dornan, Paolo Gandini, J. Merkel, N. H. Brook, Rakesh Kumar, Nicholas Adam Styles, V. Rusinov, C. J. Densham, Marco Adinolfi, A. Mazurov, Eduardo Rodrigues, Olivier Deschamps, Gianni Penso, R. J. Barlow, P. Sail, Marta Calvi, J. van Tilburg, C. Patrignani, A. Sparkes, V. Tisserand, A. Martens, V. Niess, F. Ferreira Rodrigues, F. Soomro, A. Shires, D. L. Perego, Adlène Hicheur, N. Lopez-March, P. E. L. Clarke, E. Grauges, S. Gregson, Ph. Charpentier, R. Bernhard, J. Panman, Markus Frank, W. Reece, B. Corajod, G. Conti, S. Lindsey, F. Machefert, A. Comerma-Montells, W. Bonivento, C. Göbel, Jonas Rademacker, A. C. dos Reis, O. Steinkamp, B. Jost, C. Coca, M. Benayoun, R. Currie, J. Serrano, D. Websdale, W. Qian, B. Franek, Krzysztof Grzegorz Sobczak, Stephen M. Stahl, G. Pessina, C. Ilgner, A P Ostankov, S. Hansmann-Menzemer, A. Schopper, Nikolay Bondar, B. Khanji, C. Adrover, W. Cameron, H. Voss, Matthew Needham, J.H. Bibby, Paul Fraser Harrison, M.O. Dima, R. Mountain, O. Okhrimenko, B. Jean-Marie, L. Li, N. Neufeld, R. Märki, S. Donleavy, S. Poss, Ming Zeng, Ph. Ghez, A. Sciubba, J. Amoraal, Marco Clemencic, T. Lesiak, A. Puig Navarro, B. Saitta, J. Marks, C. Potterat, B. D'Almagne, Alexey Vorobyev, T. du Pree, C. Blanks, J. Dickens, G. A. Cowan, G. Manca, M. Calvo Gomez, Guoming Liu, O. Schneider, M. Pepe Altarelli, N. Mangiafave, A. Bobrov, G. Corti, O. Jamet, Marco Gersabeck, J. Carroll, Karol Hennessy, M. Charles, Tjeerd Ketel, B. B. Shao, S. Vecchi, R. Lindner, C. Bauer, C. Parkes, Howard Gordon, F. Eisele, I. Videau, J. Nardulli, Yasmine Amhis, J. Wishahi, Thomas Schneider, P. Gavillet, M. H. Schune, U. Uwer, M. Savrie, Yuehong Xie, D. Martinez Santos, J. Keaveney, Y.N. Gao, A. Pazos Alvarez, Mark Whitehead, Y. Bagaturia, V. Shevchenko, C. Farinelli, Xavier Vilasis-Cardona, A. Bay, A. Petrolini, Hugh Philip Skottowe, K. Holubyev, F. Teubert, J. Lefrançois, W. Baldini, R. Schwemmer, J. Imong, G. Raven, D. Decamp, A. Golutvin, R. Harji, G. N. Patrick, M. Korolev, Yang Li, S. Easo, P. Campana, A. Borgia, S. G. Katvars, B. Souza De Paula, G. Valenti, C. Fournier, U. Kerzel, T. E. Latham, Z. Mathe, Christine Mclean, Marcin Kucharczyk, M. Lenzi, C. Thomas, D. R. Johnson, C. R. Jones, J. F. J. van den Brand, I. Kudryashov, S. Kukulak, N. Tuning, Simone Bifani, Y. Zhang, M. Agari, N. A. Smith, E. van Herwijnen, S. Perazzini, E. Tarkovskiy, M. L. Woodward, S. Basiladze, M. Alfonsi, R. Muresan, V. Balagura, S. Ricciardi, S. Redford, Christoph Frei, L. Garrido, P. Hunt, F. Dupertuis, P. Alvarez Cartelle, Sandra Amato, A. Bondar, P. Collins, K. Belous, P. Hopchev, C. Linn, C. Salzmann, R. Graciani Diaz, Neville Harnew, R. M. D. Mamunur, M. Britsch, J. Christiansen, Silvia Borghi, Pavel Krokovny, S. Monteil, Manuel Schiller, F. Fontanelli, M. Deissenroth, N. Chiapolini, A. Powell, B. Rakotomiaramanana, Stephane T'Jampens, Sadia Khalil, J. P. Lees, S. Filippov, Andre Massaferri, M. Ferro-Luzzi, P. Szczypka, M. Musy, C. Pavel, X. Cid Vidal, F. Muheim, M. Veltri, G. Haefeli, C. Satriano, Valery Pugatch, A. Zhelezov, and E. Lopez Asamar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Large Hadron Collider, Meson, 010308 nuclear & particles physics, Generator (category theory), Strangeness, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), Rapidity, Nuclear Experiment, 010306 general physics, Beam (structure)
Abstract

The production of K_short mesons in pp collisions at a centre-of-mass energy of 0.9 TeV is studied with the LHCb detector at the Large Hadron Collider. The luminosity of the analysed sample is determined using a novel technique, involving measurements of the beam currents, sizes and positions, and is found to be 6.8 +/- 1.0 microbarn^-1. The differential prompt K_short production cross-section is measured as a function of the K_short transverse momentum and rapidity in the region 0 < pT < 1.6 GeV/c and 2.5 < y < 4.0. The data are found to be in reasonable agreement with previous measurements and generator expectations.

Published
2010

30. High-rate performance of the MWPCs for the LHCb muon system

Author

Francesco Iacoangeli, M. Gatta, R. A. Nobrega, M. Anelli, Barbara Sciascia, C. Forti, V. Bocci, D. Pinci, M. Santoni, Alessio Sarti, G. Lanfranchi, G. Felici, Paolo Ciambrone, G. Martellotti, A. Saputi, E. Dané, R. Rosellini, Gianni Penso, G. Chiodi, and W. Rinaldi

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Wire chamber, Large Hadron Collider, Muon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Radioactive source, Particle detector, Nuclear physics, Measuring instrument, Physics::Accelerator Physics, High Energy Physics::Experiment, Instrumentation, elementary-particle and nuclear physics experimental methods and, elementary-particle and nuclear physics experimental methods and instrumentation, gas detectors, instrumentation, multiwire proportional chambers, tracking and position-sensitive detectors, Beam (structure), Lepton
Abstract

The high-rate performance of a multiwire proportional chamber of the LHCb muon detector was tested. The chamber, equipped with the final front-end electronics, was tested using a � 100 GeV muon beam superimposed on a 662 keV g flux of variable intensity produced by the 137 Cs radioactive source of the CERN Gamma Irradiation Facility (GIF). No significant variation in the muon detection efficiency or in the time response of the chamber was observed at the highest gamma rate. & 2008 Elsevier B.V. All rights reserved.

Published
2008

31. Results of the Quality Controls of the Four-Gap MWPCs Produced at LNF for LHCb

Author

Alessio Sarti, D. Pinci, and E. Dané

Subjects
Set (abstract data type), Physics, Nuclear and High Energy Physics, Muon, Quality (physics), Nuclear Energy and Engineering, business.industry, Measure (physics), Electrical engineering, Mechanical engineering, Electrical and Electronic Engineering, Mechanical tension, business
Abstract

A summary of the quality controls performed on the 185 four-gap Multi-Wire Proportional Chambers (MWPC) produced at the Laboratori Nazionali di Frascati to equip the Muon System of the LHCb experiment is reported in this paper. The results of a set of tests, designed and realized to check the wire pitch and mechanical tension before the assembly and to measure the performance of the chambers, are reported and illustrated in details. All the chambers, but one which has problems of gas tightness, show the quality required by the experiment

Published
2007

32. Measurement of time resolution of the Mu2e LYSO calorimeter prototype

Author

M. Martini, F. Colao, D. G. Hitlin, E. Dané, V. A. Baranov, T. S. Miyashita, Gianantonio Pezzullo, M. Cordelli, G. F. Tassielli, G. Corradi, V. Glagolev, Luca Morescalchi, I. Sarra, V. Tereshchenko, S. Giovannella, Yu.I. Davydov, S. Miscetti, F. Happacher, N. Atanov, K. T. Flood, S.R. Soleti, A. Saputi, Atanov, N., Baranov, V., Colao, F., Cordelli, M., Corradi, G., Dané, E., Davydov, Yu. I., Flood, K., Giovannella, S., Glagolev, V., Happacher, F., Hitlin, D. G., Martini, M., Miscetti, S., Miyashita, T., Morescalchi, L., Pezzullo, G., Saputi, A., Sarra, I., Soleti, S. R., Tassielli, G., and Tereshchenko, V.

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, APDS, Physics::Instrumentation and Detectors, FOS: Physical sciences, Calorimetry, 01 natural sciences, Lyso, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, Mu2e, Electron beam processing, Timing, 010306 general physics, LYSO crystal, Instrumentation, Nuclear and High Energy Physic, Physics, Mu2e experiment, 010308 nuclear & particles physics, APD, Instrumentation and Detectors (physics.ins-det), Avalanche photodiode, Calorimeter, Physics::Accelerator Physics, Beam (structure)
Abstract

In this paper we present the time resolution measurements of the Lutetium-Yttrium Oxyorthosilicate (LYSO) calorimeter prototype for the Mu2e experiment. The measurements have been performed using the $e^-$ beam of the Beam Test Facility (BTF) in Frascati, Italy in the energy range from 100 to 400 MeV. The calorimeter prototype consisted of twenty five 30x30x130 mm$^3$, LYSO crystals read out by 10x10 mm$^2$ Hamamatsu Avalanche Photodiodes (APDs). The energy dependence of the measured time resolution can be parametrized as $\sigma_{t}(E)=a/\sqrt{E/\mathrm{GeV}} \oplus b$, with the stochastic and constant terms $a=(51\pm1)$ ps and $b=(10\pm4)$ ps, respectively. This corresponds to the time resolution of ($162\pm4$) ps at 100 MeV., Comment: 18 pages, 14 figures, accepted for the journal Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Published
2015

33. Automated wire tension measurement system for LHCb muon chambers

Author

A. Nedosekin, Gianni Penso, M. Dwuznik, G. Felici, A. Frenkel, E. Dané, B. Schmidt, A. Kachtchouk, J.S. Graulich, Paolo Ciambrone, V. Shubin, A. Medvedkov, V. V. Kulikov, C. Forti, Giuseppe Pirozzi, G. Martellotti, R. Dumps, and D. Pinci

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, business.industry, Oscillation, High voltage, Sense (electronics), Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Capacitance, Particle detector, Optics, Nuclear magnetic resonance, Mechanical resonance, business, Instrumentation, Strain gauge, Electronic circuit
Abstract

A wire tension meter has been developed for the multi-wire proportional chambers of the LHCb muon detector. The wire tension is deduced from its mechanical resonance frequency. In the LHCb muon chambers, the wires are 2 mm apart and electrically connected in groups of 3–32, so that the wire excitation system must be precisely positioned with respect to the wire to be tested. This wire is forced to oscillate by a periodic high voltage applied between that wire and a non-oscillating “sense wire” placed parallel and close to it. This oscillation produces a variation of the capacitance between these two wires which is measured by a high precision digital electronic circuit. At the resonance frequency this capacitance variation is maximum. The system has been systematically investigated and its parameters were optimized. In the range 0.4–1 N a good agreement is found between the mechanical tension measured by this system and by a dynamometer.

Published
2005

34. 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

35. U boson searches at KLOE

Author

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

Subjects
Physics, History, Particle physics, 010308 nuclear & particles physics, FOS: Physical sciences, Gauge (firearms), 01 natural sciences, Computer Science Applications, Education, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Low energy, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, 010306 general physics, Boson
Abstract

The existence of a secluded gauge sector could explain several puzzling astrophysical observations. This hypothesis can be tested at low energy e+e- colliders such as DAPHNE. Preliminary results obtained with KLOE data and perpectives for the KLOE-2 run, where a larger data sample is expected, are discussed., Comment: 8 pages, 5 figures

Published
2011
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36. Performance of the LHCb muon system with cosmic rays

Author

S. Decapua, G. Sabatino, A. Lai, M. Frosini, R. AntunesNobrega, Francesco Dettori, P. Desimone, Paolo Ciambrone, W. Bonivento, A. Falabella, Biagio Saitta, C. Deplano, Alessandro Cardini, Thomas Schneider, G. Passaleva, W. Baldini, S. Vecchi, R. Berutti, S. Pozzi, G. Martellotti, F. Murtas, P. Campana, F. Ferreira Rodriguez, O. Maev, A. Saputi, G. Manca, E. Dané, O. Levitskaya, M. Veltri, Sandro Cadeddu, E. Santovetti, G. Carbonih, G. Penso, G. Lanfranchi, A. Vorobyev, R. Santacesaria, M. Anelli, M. Palutan, S. Furcas, B. Botchin, A. Petrella, R. Messi, Alessio Sarti, V. Bocci, D. Pinci, A. Massafferri Rodrigues, P. Neustroev, G. Bencivenni, R. G. C. Oldemane, M. Lenzi, B. Schmidt, G. Graziani, Pavel Shatalov, K. Mair, A. Satta, C. Satriano, G. Auriemma, A. Kashchuk, M. Savrie, M. Carletti, Nikolay Bondar, A. Sciubba, Lukas Gruber, and Serguei Volkov

Subjects
Muon spectrometers, Wire chambers(MWPC, Thin-gap chambers, drift chambers, drift tubes, proportional chambers etc), Trigger detectors, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Cosmic ray, High Energy Physics - Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, High Energy Physics - Experiment (hep-ex), drift chambers, Detectors and Experimental Techniques, Instrumentation, Mathematical Physics, muon spectrometers, trigger detectors, wire chambers(mwpc, thin-gap chambers, drift tubes, proportional chambers etc), Physics, Large Hadron Collider, Muon, Spacetime, Detector, Thin-gap chambers, Time resolution, Instrumentation and Detectors (physics.ins-det), Cluster size, High Energy Physics::Experiment, Wire chambers(MWPC
Abstract

The LHCb Muon system performance is presented using cosmic ray events collected in 2009. These events allowed to test and optimize the detector configuration before the LHC start. The space and time alignment and the measurement of chamber efficiency, time resolution and cluster size are described in detail. The results are in agreement with the expected detector performance., Comment: Submitted to JINST and accepted

Published
2010

37. Physics with the KLOE-2 experiment at the upgraded DAFNE

Author

Eryk Czerwiński, I. Sarra, R. Lehnert, S. Fiore, Bo Höistad, Francesco Giacosa, S. A. Bulychjev, C. Taccini, S. Giovannella, F. Ceradini, Henryk Czyz, G. De Robertis, Beatrix C. Hiesmayr, Stefan E. Müller, B. Di Micco, Jarosław Zdebik, G. V. Fedotovich, Luca Tortora, Rouven Essig, Marek Jacewicz, C. Bloise, Sarben Sarkar, Nikolaos Mavromatos, A. Passeri, Antonio Budano, G. Capon, S. Ivashyn, W. Wislicki, S. Miscetti, Paweł Moskal, P. Gauzzi, Philip Schuster, V. Kulikov, F. Loddo, F. Archilli, G. Felici, R. Versaci, F. Bossi, Natalia Toro, A. Di Domenico, P. De Simone, Federico Mescia, M. Martemianov, Michał Silarski, Diogo Boito, D. Babusci, G. Venanzoni, R. A. Bertlmann, P.A. Lukin, D. Moricciani, O. Erriquez, V. Bocci, Joaquim Prades, A. Ranieri, Vincenzo Patera, F. Gonnella, Fred Jegerlehner, F. Happacher, G. D’Ambrosio, Andrzej Kupsc, Tord Johansson, P. Ciambrone, M. A. Matsyuk, Adalberto Sciubba, E. Passemar, Paolo Franzini, G. Amelino-Camelia, Barbara Sciascia, M. Martini, R. Messi, Michael J. Reece, P. Branchini, Marco Schioppa, E. Graziani, P. Santangelo, Davide Badoni, Lina Quintieri, G. De Zorzi, L.-T. Wang, E. Iarocci, W. Kluge, Juliet Lee-Franzini, E. De Lucia, Cesare Bini, D. Domenici, P. Campana, Rafel Escribano, Michael R. Pennington, F. Nguyen, M. Wolke, C. Di Donato, E. Dané, G. Bencivenni, M. Passera, S. Eidelman, A. De Santis, G. Morello, Jose Bernabeu, Amelino Camelia, G, Archilli, F, Babusci, D, Badoni, D, Bencivenni, G, Bernabeu, J, Bertlmann, R, Boito, D, Bini, C, Bloise, C, Bocci, V, Bossi, F, Branchini, P, Budano, A, Bulychjev, S, Campana, P, Capon, G, Ceradini, Filippo, Ciambrone, P, Czerwinski, E, Czyz, H, D'Ambrosio, G, Dane, E, De Lucia, E, De Robertis, G, De Santis, A, De Simone, P, De Zorzi, G, Di Domenico, A, Di Donato, C, DI MICCO, Biagio, Domenici, D, Eidelman, S, Erriquez, O, Escribano, R, Essig, R, Fedotovich, Gv, Felici, G, Fiore, S, Franzini, P, Gauzzi, P, Giacosa, F, Giovannella, S, Gonnella, F, Graziani, E, Happacher, F, Hiesmayr, Bc, Hoistad, B, Iarocci, E, Ivashyn, S, Jacewicz, M, Jegerlehner, F, Johansson, T, Lee Franzini, J, Kluge, W, Kulikov, Vv, Kupsc, A, Lehnert, R, Loddo, F, Lukin, P, Martemianov, Ma, Martini, M, Matsyuk, Ma, Mavromatos, Ne, Mescia, F, Messi, R, Miscetti, S, Morello, G, Moricciani, D, Moskal, P, Mueller, S, Nguyen, F, Passemar, E, Passera, M, Passeri, A, Patera, V, Pennington, M, Prades, J, Quintieri, L, Ranieri, A, Reece, M, Santangelo, P, Sarkar, S, Sarra, I, Schioppa, M, Schuster, Pc, Sciascia, B, Sciubba, A, Silarski, M, Taccini, C, Toro, N, Tortora, L, Venanzoni, G, Versaci, R, Wang, Lt, Wislicki, W, Wolke, M, Zdebik, J., and Universitat de Barcelona

Subjects
Particle physics, Field theory (Physics), Meson, Physics and Astronomy (miscellaneous), Scalar (mathematics), Hadron, Continuum (design consultancy), 01 natural sciences, Partícules (Física nuclear), Standard Model, Gamma gamma, High Energy Physics - Experiment, 0103 physical sciences, Radiative transfer, Mesons (Nuclear physics), Teoria quàntica, Mesons (Física nuclear), 010306 general physics, Engineering (miscellaneous), Nuclear Experiment, Particles (Nuclear physics), Physics, Quantum Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Time evolution, Teoria de camps (Física), Física, Kaons, 3. Good health, High Energy Physics - Phenomenology, Quantum theory, High Energy Physics::Experiment
Abstract

Investigation at a $\phi$--factory can shed light on several debated issues in particle physics. We discuss: i) recent theoretical development and experimental progress in kaon physics relevant for the Standard Model tests in the flavor sector, ii) the sensitivity we can reach in probing CPT and Quantum Mechanics from time evolution of entangled kaon states, iii) the interest for improving on the present measurements of non-leptonic and radiative decays of kaons and eta/eta$^\prime$ mesons, iv) the contribution to understand the nature of light scalar mesons, and v) the opportunity to search for narrow di-lepton resonances suggested by recent models proposing a hidden dark-matter sector. We also report on the $e^+ e^-$ physics in the continuum with the measurements of (multi)hadronic cross sections and the study of gamma gamma processes., Comment: 60 pages, 41 figures; added affiliation for one of the authors; added reference to section 6

Published
2010

38. Detailed study of the gain of the MWPCs for the LHCb muon system

Author

Alessio Sarti, E. Dané, Gianni Penso, and Davide Pinci

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Wire chamber, Muon, Ionization, Radioactive source, Automatic gain control, elementary-particle and nuclear physics experimental methods and instrumentation, multiwire proportional chambers, tracking and position-sensitive detectors, Instrumentation, Particle detector, Anode, Absolute gain
Abstract

The gain of a multiwire proportional chamber (MWPC) of the LHCb muon detector was measured precisely. The chamber, filled with a CO 2 / Ar / CF 4 gas mixture, 55/40/5% in volume, was irradiated with a 1.3 GBq 137Cs radioactive source and the current drawn by the chamber was measured. By precisely determining the primary ionization current it was possible to evaluate the absolute gain of the chamber. The dependence of the gain on the anode voltage and the gas density was measured and the need for a gain control system during the LHCb data taking is considered. Our experimental results are compared with those predicted for the chamber gain by Diethorn formula.

Published
2007

39. Precise gain measurement of the LHCb muon chambers

Author

Alessio Sarti, E. Dané, Gianni Penso, and D. Pinci

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Muon, Physics::Instrumentation and Detectors, Tracking (particle physics), Atomic and Molecular Physics, and Optics, Particle detector, Anode, Absolute gain, Nuclear physics, Muon collider, Measuring instrument, Physics::Accelerator Physics, High Energy Physics::Experiment, Detectors and Experimental Techniques
Abstract

The muon detector of the LHCb experiment, which will operate at the Large Hadron Collider (LHC) at CERN, consists of five muon tracking stations placed along the beam axis and equipped mainly with multi-wire proportional chambers (MWPC). In the present paper we report the results of a precise measurement of the gain of the MWPC’s as a function of the anode voltage. A precise evaluation of the primary ionization current (of about 5 pA) was performed. The absolute gain of the chambers was deduced as a function of the anode voltage and compared with the prediction of the Diethorn formula.

Published
2006

40. CCALT: A Crystal CALorimeter with Timing for the KLOE-2 upgrade

Author

A. Luca, S. Miscetti, M. Cordelli, A. Saputi, M. Gatta, E. Dané, B. Ponzio, F. Happacher, G. Pileggi, I. Sarra, and S. Giovannella

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Physics::Instrumentation and Detectors, business.industry, Detector, Particle detector, Particle identification, Lyso, Semiconductor detector, Calorimeter, Optics, Silicon photomultiplier, High Energy Physics::Experiment, business, Instrumentation
Abstract

The KLOE-2 detector has been successfully rolled in inside the new interaction region of the DA Φ NE machine, which is still in its commissioning phase. Construction of detector upgrades is in progress to provide larger acceptance both for charged particles and photons. The CCALT calorimeters will be placed in front of the inner quadrupoles, inside the apparatus, thus increasing the acceptance for prompt decay channels. They consist of two barrels of LYSO crystals, read-out with large area SiPM. This choice provides high efficiency for low energy photons and good timing performances, needed to reject machine background events. Tests of a calorimeter prototype were carried out both with electron and photon beams, showing high light yield and good timing capabilities. The construction of the CCALT detector is in progress and will be completed in few months, in time for installing it over the new interaction region.

Published
2013

41. A WIRE TENSION METER FOR THE LHCb MUON CHAMBERS

Author

G. Felici, A. Buccheri, A. Medvedkov, G. Martellotti, Giuseppe Pirozzi, G. Penso, E. Dané, R. Dumps, M. Dwuznik, A. Frenkel, A. Pelosi, A. Nedosekin, C. Forti, D. Pinci, V. V. Kulikov, B. Schmidt, and A. Kachtchouk

Subjects
Physics, Nuclear physics, Particle physics, Muon, Wire tension, Metre
Published
2004

42. 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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43. 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.

44. Systems for the MWPC test at the LNF production site

Author

G. Martellotti, Alessio Sarti, A. Frani, R. Rosellini, D. Pinci, Gianni Penso, E. Dané, M. Anelli, U. Denni, A. Sciubba, Pierluigi Campana, M. Santoni, and C. Forti

Subjects
Physics, Muon, Physics::Instrumentation and Detectors, business.industry, Tension (physics), Detector, Electrical engineering, Cosmic ray, Capacitance, Overpressure, Quality (physics), Optics, Electronics, business
Abstract

The performance needed for the Level-0 trigger of the experiment LHCb translates in very stringent requirements on the quality of the detectors equipping the muon system. In this paper, the test systems adopted at the "Laboratori Nazionali di Frascati" production site for the quality control of the multi-wire proportional chambers for the LHCb muon system are described. After wire winding and gluing the wire pitch is measured by means of digital cameras with a precision of about 20 /spl mu/m. For the evaluation of the wire mechanical tension a system which find the wire resonance frequency by measuring the variations of the capacitance between the measured wire and a reference one was developed achieving a resolution of about 1 g. Once all elements of the chamber are assembled, the gas tightness of the detector is verified by monitoring the decrease of an overpressure applied. After a suitable chamber conditioning, the gas gain uniformity is measured by using a /sup 137/Cs source. The detectors, fully-equipped with the front end electronics, are tested under cosmic rays to measure their efficiency and time resolution.

45. Stability of and Change in Psychopathological Risk Levels in Pre-Early Adolescents before, during, and after Their Study Sojourns: A Descriptive Study.

Author

Cerniglia, Luca and Cimino, Silvia

Subjects
TEENAGERS, ACADEMIC enrichment, FOREIGN study, MATURATION (Psychology), EMOTIONAL experience
Abstract

Background: Adolescents can benefit from studying abroad in terms of personal development, cross-cultural encounters, and academic enrichment. This article digs into the psychological challenges that students may face before and during their study abroad, focusing on the emotional components of their experiences. Methods: The current descriptive study sought to assess the stability or change in levels of psychopathological risk in a sample of N = 195 adolescents before and during a study abroad sojourn. To examine psychological symptoms in pre-adolescents, teachers were asked to complete a report-form questionnaire. Results: The findings of this study revealed that students' psychological functioning changed significantly after their study abroad experience. Anxious/depressed and withdrawn ratings specifically increased from the pre-sojourn assessment (T1) to the evaluation during the stay (T2), then remained consistent (T3). In addition, the scores for rule-breaking and aggressive conduct changed, increasing from T1 to T2 and then decreasing from T2 to T3. This trend implies that teenagers may struggle with behavioral challenges early in their study abroad experience, but subsequently adjust and improve their conduct as they grow more used to the new environment. Conclusions: this research offers insight into the emotional and behavioral issues that adolescents face when studying abroad, underlining the significance of treating psychopathological risk factors in this demographic. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Un motivo valido

Author

Lisa M. Owens and Lisa M. Owens

Abstract

Serie Il valore dell'amore, Libro 1Per Josh Brooks è un'estate di desideri che diventano realtà. Prima riesce a comprare il cavallo dei suoi sogni da un addestratore rivale. Poi conosce anche l'uomo dei suoi sogni, il Ranger Dane Keller, commilitone del fratello. Dane è sexy, abile, e reduce dall'ambigua politica dell'esercito americano riguardo all'omosessualità. Sarebbe tutto perfetto, eccetto che nessuno sa che Josh e Dane sono gay. Quando Dane arriva al ranch, vuole soltanto una vita tranquilla senza la segretezza estrema che l'ha costretto a nascondersi e un lavoro che gli permetta di guadagnarsi da vivere. Ma il fratellino del suo migliore amico, quello che aveva scritto le lettere che li avevano tenuti su di morale in Afghanistan, sembra proprio essere cresciuto e Dane non può fare a meno di desiderare qualcosa di più, nonostante la paura di impegnarsi. Mentre Dane e Josh cercano in tutti i modi di tenere le mani a posto, fallendo miseramente, qualcun altro osserva, in attesa, e infine colpisce, prima Josh e poi il prezioso cavallo. Quando tutti i loro segreti e le loro paure vengono esposti, Dane è determinato a proteggere Josh, anche se questo significa lasciarlo indietro.

Published
2016

48. Design, status and test of the Mu2e crystal calorimeter.

Author

N. Atanov, V. Baranov, J. Budagov, R. Carosi, F. Cervelli, F. Colao, M. Cordelli, G. Corradi, E. Dané, Y. I. Davydov, S. Di Falco, S. Donati, R. Donghia, B. Echenard, K. Flood, S. Giovannella, V. Glagolev, F. Grancagnolo, F. Happacher, and D. G. Hitlin

Published
2017
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50. A 50 l Cygno prototype overground characterization.

Author

Amaro, Fernando Domingues, Antonietti, Rita, Baracchini, Elisabetta, Benussi, Luigi, Bianco, Stefano, Borra, Francesco, Capoccia, Cesidio, Caponero, Michele, Cardoso, Danilo Santos, Cavoto, Gianluca, Costa, Igor Abritta, Dané, Emiliano, Dho, Giorgio, Di Giambattista, Flaminia, Di Marco, Emanuele, D'Imperio, Giulia, dos Santos, Joaquim Marques Ferreira, di Cortona, Giovanni Grilli, Iacoangeli, Francesco, and Kemp, Ernesto

Abstract

The nature of dark matter is still unknown and an experimental program to look for dark matter particles in our Galaxy should extend its sensitivity to light particles in the GeV mass range and exploit the directional information of the DM particle motion (Vahsen et al. in CYGNUS: feasibility of a nuclear recoil observatory with directional sensitivity to dark matter and neutrinos, , 2020). The Cygno project is studying a gaseous time projection chamber operated at atmospheric pressure with a Gas Electron Multiplier (Sauli in Nucl Instrum Meth A 386:531, , 1997) amplification and with an optical readout as a promising technology for light dark matter and directional searches. In this paper we describe the operation of a 50 l prototype named LIME (Long Imaging ModulE) in an overground location at Laboratori Nazionali di Frascati (LNF) of INFN. This prototype employs the technology under study for the 1 cubic meter Cygno demonstrator to be installed at the Laboratori Nazionali del Gran Sasso (LNGS) (Amaro et al. in Instruments 2022, 6(1), , 2022). We report the characterization of LIME with photon sources in the energy range from few keV to several tens of keV to understand the performance of the energy reconstruction of the emitted electron. We achieved a low energy threshold of few keV and an energy resolution over the whole energy range of 10–20%, while operating the detector for several weeks continuously with very high operational efficiency. The energy spectrum of the reconstructed electrons is then reported and will be the basis to identify radio-contaminants of the LIME materials to be removed for future Cygno detectors. [ABSTRACT FROM AUTHOR]

Published
2023
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