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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 design of the MEG II experiment

Author

A. M. Baldini, E. Baracchini, C. Bemporad, F. Berg, M. Biasotti, G. Boca, P. W. Cattaneo, G. Cavoto, F. Cei, M. Chiappini, G. Chiarello, C. Chiri, G. Cocciolo, A. Corvaglia, A. de Bari, M. De Gerone, A. D’Onofrio, M. Francesconi, Y. Fujii, L. Galli, F. Gatti, F. Grancagnolo, M. Grassi, D. N. Grigoriev, M. Hildebrandt, Z. Hodge, K. Ieki, F. Ignatov, R. Iwai, T. Iwamoto, D. Kaneko, K. Kasami, P.-R. Kettle, B. I. Khazin, N. Khomutov, A. Korenchenko, N. Kravchuk, T. Libeiro, M. Maki, N. Matsuzawa, S. Mihara, M. Milgie, W. Molzon, Toshinori Mori, F. Morsani, A. Mtchedilishvili, M. Nakao, S. Nakaura, D. Nicolò, H. Nishiguchi, M. Nishimura, S. Ogawa, W. Ootani, M. Panareo, A. Papa, A. Pepino, G. Piredda, A. Popov, F. Raffaelli, F. Renga, E. Ripiccini, S. Ritt, M. Rossella, G. Rutar, R. Sawada, G. Signorelli, M. Simonetta, G. F. Tassielli, Y. Uchiyama, M. Usami, M. Venturini, C. Voena, K. Yoshida, Yu. V. Yudin, and Y. Zhang

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The MEG experiment, designed to search for the $${\mu ^+ \rightarrow \hbox {e}^+ \gamma }$$ μ+→e+γ decay, completed data-taking in 2013 reaching a sensitivity level of $${5.3\times 10^{-13}}$$ 5.3×10-13 for the branching ratio. In order to increase the sensitivity reach of the experiment by an order of magnitude to the level of $$6\times 10^{-14}$$ 6×10-14 , a total upgrade, involving substantial changes to the experiment, has been undertaken, known as MEG II. We present both the motivation for the upgrade and a detailed overview of the design of the experiment and of the expected detector performance.

Published
2018
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3. 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

4. Study of Performance of Different Photodetectors and Electrical Signal for Fast Detection in Fifty Litres CYGNO Prototype (LIME)

Author

F.D. Amaro, E. Baracchini, L. Benussi, S. Bianco, C. Capoccia, M. Caponero, D. S. Cardoso, G. Cavoto, A. Cortez, I.A. Costa, E. Dane, G. Dho, F. Di Giambattista, E. Di Marco, G. D'Imperio, F. Iacoangeli, H.P. Lima, G.S.P. Lopes, G. Maccarrone, R.D.P. Mano, M. Marafini, R.R. Marcelo Gregorio, G. Mazzitelli, A.G. McLean, A. Messina, C.M.B. Monteiro, R.A. Nobrega, I.F. Pains, E. Paoletti, L. Passamonti, A. 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. Tomassini, and S. Torelli

Published
2021

5. Performance of an optically read out time projection chamber with ultra-relativistic electrons

Author

E. Paoletti, R. A. Nobrega, G. Maccarrone, D. Piccolo, F. Renga, L. Passamonti, A. D. Russo, Davide Pinci, D. Pierluigi, F. Rosatelli, G. Dho, V. C. Antochi, I.A. Costa, G. Cavoto, Giovanni Mazzitelli, A.F.V. Cortez, C. Capoccia, S. Bianco, C. Voena, Francesco Iacoangeli, E. Baracchini, G. D'Imperio, E. Di Marco, Fabrizio Petrucci, G. Saviano, Michele Arturo Caponero, L. Benussi, M. Marafini, A. Orlandi, A. Messina, Sandro Tomassini, Antochi, V. C., Baracchini, E., Benussi, L., Bianco, S., Capoccia, C., Caponero, M., Cavoto, G., Cortez, A., Costa, I. A., Di Marco, E., D’Imperio, G, Dho, G., Iacoangeli, F., Maccarrone, G., Marafini, M., Mazzitelli, G., Messina, A, Nóbrega, R. A., Orlandi, A., Paoletti, E., Passamonti, L., Petrucci, F., Piccolo, D., Pierluigi, D., Pinci, D., Renga, F., Rosatelli, F., Russo, A., Saviano, G., Tomassini, S., and Voena, C.

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Solar neutrino, Dark matter, FOS: Physical sciences, Applied Physics (physics.app-ph), Electron, 7. Clean energy, 01 natural sciences, dark matter, Nuclear physics, Ionization, 0103 physical sciences, GEM, MPGD, optical readout, TPC, tracking detector, 010306 general physics, Instrumentation, Physics, CMOS sensor, Time projection chamber, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), Physics - Applied Physics, Charged particle, Beam (structure)
Abstract

The Time Projection Chamber (TPC) is an ideal candidate to finely study the charged particle ionization in a gaseous medium. Large volume TPCs can be readout with a suitable number of channels offering a complete 3D reconstruction of a charged particle track, that is the sequence of its energy releases in the TPC gas volume. Moreover, He-based TPCs are very promising to study keV energy particles as nuclear recoils, opening the possibility for directional searches of Dark Matter (DM) and the study of Solar Neutrinos (SN). In this paper we report the analysis of the data acquired with a small TPC prototype (named LEMOn) built by the CYGNO collaboration that was exposed to a beam of 450 MeV electrons at the Beam Test Facility of National Laboratories of Frascati. LEMOn is operated with a He-C F 4 mixture at atmospheric pressure and is based on a Gas Electron Multipliers amplification stage that produces visible light collected by the high granularity and very good sensitivity of scientific CMOS camera. This type of readout – in conjunction with a fast light detection – allows a 3D reconstruction of the electrons tracks. The electrons are leaving a trail of clusters of ionizations corresponding to a few keV energy release each. Their study leads to predict a keV energy threshold and 1–10 mm longitudinal and 0.1–0.3 mm transverse position resolution (sigma) for nuclear recoils, very promising for the application of optically read out TPC to DM searches and SN measurements.

Published
2021
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6. Directional dark matter searches with CYGNO

Author

Emiliano Dané, S. Bianco, Stefano Piacentini, Giovanna Saviano, Fabrizio Petrucci, Joaquim M. F. dos Santos, Amaro da Silva Lopes Júnior, Flaminia Di Giambattista, N. J. C. Spooner, Robert R. M. Gregorio, E. Paoletti, D. Piccolo, G. Dho, Sandro Tomassini, D. Pierluigi, R. A. Nobrega, A.F.V. Cortez, Roberto Tesauro, L. Benussi, M. Marafini, I. A. Costa, G. Maccarrone, Herman P. Lima Júnior, L. Passamonti, F. D. Amaro, Michele Arturo Caponero, Sandro Pelosi, Francesco Iacoangeli, A. Messina, C.M.B. Monteiro, F. Renga, Emanuele Di Marco, Samuele Torelli, Igor F. Pains, C. Capoccia, E. Baracchini, Andrea Russo, Rita Joana da Cruz Roque, F. Rosatelli, Rui Daniel Passos Mano, Atul Prajapati, Giovanni Mazzitelli, G. Cavoto, Alasdair G. McLean, G. D'Imperio, and D. Pinci

Subjects
Physics, optical readout, Photomultiplier, CMOS sensor, Time projection chamber, 010308 nuclear & particles physics, business.industry, Solar neutrino, Dark matter, Detector, QC770-798, dark matter, time projection chamber, 01 natural sciences, electroluminescence, negative ion drift, Optics, Nuclear and particle physics. Atomic energy. Radioactivity, 3d tracking, 0103 physical sciences, 010306 general physics, business
Abstract

The CYGNO project aims at developing a high resolution Time Projection Chamber with optical readout for directional dark matter searches and solar neutrino spectroscopy. Peculiar CYGNO’s features are the 3D tracking capability provided by the combination of photomultipliers and scientific CMOS camera signals, combined with a helium-fluorine-based gas mixture at atmospheric pressure amplified by gas electron multipliers structures. In this paper, the performances achieved with CYGNO prototypes and the prospects for the upcoming underground installation at Laboratori Nazionali del Gran Sasso of a 50-L detector in fall 2021 will be discussed, together with the plans for a 1-m3 experiment. The synergy with the ERC consolidator, grant project INITIUM, aimed at realising negative ion drift operation within the CYGNO 3D optical approach, will be further illustrated.

Published
2021

7. Discovering supernova-produced dark matter with directional detectors

Author

G. Dho, William DeRocco, and E. Baracchini

Subjects
Physics, education.field_of_study, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Population, Galactic Center, Dark matter, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Galaxy, High Energy Physics - Experiment, Supernova, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), WIMP, Weakly interacting massive particles, 0103 physical sciences, 010306 general physics, education, Light dark matter, Astrophysics::Galaxy Astrophysics
Abstract

Supernovae can produce vast fluxes of new particles with masses on the MeV scale, a mass scale of interest for models of light dark matter. When these new particles become diffusively trapped within the supernova, the escaping flux will emerge semirelativistic with an order-one spread in velocities. As a result, overlapping emissions from Galactic supernovae will produce an overall flux of these particles at Earth that is approximately constant in time. However, this flux is highly anisotropic and is steeply peaked towards the Galactic center. This is in contrast with the cosmological abundance of a WIMP-like dark matter which, due to the rotation of the Galaxy, appears to come from the direction of the Cygnus constellation. In this paper, we demonstrate the need for a directional detector to efficiently discriminate between a signal from a cold cosmological abundance of GeV-scale WIMPs and a signal from a hot population of supernova-produced MeV-scale dark matter., 15 pages, 4 figures

Published
2020

8. CYGNO: a gaseous TPC with optical readout for dark matter directional search

Author

Sandro Tomassini, Francesco Iacoangeli, A.F.V. Cortez, A. Messina, G. Dho, L. Benussi, R. A. Nobrega, A. Orlandi, Davide Pinci, D. Piccolo, Fabrizio Petrucci, I. A. Costa, F. Rosatelli, E. Paoletti, Michele Arturo Caponero, G. Cavoto, G. Maccarrone, Giovanni Mazzitelli, G. Saviano, A. D. Russo, D. Pierluigi, S. Bianco, E. Baracchini, G. D'Imperio, E. Di Marco, F. Renga, Michela Marafini, C. Capoccia, L. Passamonti, Baracchini, E., Benussi, L., Bianco, S., Capoccia, C., Caponero, M., Cavoto, G., Cortez, A., Costa, I. A., Marco, E. D., D'Imperio, G., Dho, G., Iacoangeli, F., Maccarrone, G., Marafini, M., Mazzitelli, G., Messina, A., Nobrega, R. A., Orlandi, A., Paoletti, E., Passamonti, L., Petrucci, F., Piccolo, D., Pierluigi, D., Pinci, D., Renga, F., Rosatelli, F., Russo, A., Saviano, G., and Tomassini, S.

Subjects
axions, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Particle tracking detectors (Gaseous detectors), Solar neutrino, Dark matter, FOS: Physical sciences, Electron, 01 natural sciences, 7. Clean energy, Signal, etc, ), 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Optics, Recoil, 0103 physical sciences, Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc), dark matter, gas time projection chamber, Instrumentation, Dark Matter detectors (WIMPs, Mathematical Physics, CMOS readout of gaseous detectors, Physics, Atmospheric pressure, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Dark Matter detectors (WIMPs, axions, etc,), Neutrino, business
Abstract

The CYGNO project has the goal to use a gaseous TPC with optical readout to detect dark matter and solar neutrinos with low energy threshold and directionality. The CYGNO demonstrator will consist of 1 m 3 volume filled with He:CF 4 gas mixture at atmospheric pressure. Optical readout with high granularity CMOS sensors, combined with fast light detectors, will provide a detailed reconstruction of the event topology. This will allow to discriminate the nuclear recoil signal from the background, mainly represented by low energy electron recoils induced by radioactivity. Thanks to the high reconstruction efficiency, CYGNO will be sensitive to low mass dark matter, and will have the potential to overcome the neutrino floor, that ultimately limits non-directional dark matter searches.

Published
2020

9. Stability and detection performance of a GEM-based Optical Readout TPC with He/CF$_4$ gas mixtures

Author

A. Orlandi, E. Paoletti, F. Rosatelli, G. Maccarrone, D. Pierluigi, G. Saviano, Antonio Russo, Michele Arturo Caponero, G. Mazzitelli, Sandro Tomassini, R. A. Nobrega, A.F.V. Cortez, Andrea Messina, I. A. Costa, Stefano Bianco, G. Cavoto, L. Passamonti, M. Marafini, G. D'Imperio, D. Pinci, C. Capoccia, Francesco Iacoangeli, F. Renga, G. Dho, E. Baracchini, E. Di Marco, Fabrizio Petrucci, Davide Piccolo, Luisa Benussi, Baracchini, E., Benussi, L., Bianco, S., Capoccia, C., Caponero, M., Cavoto, G., Cortez, A., Costa, I. A., Di Marco, E., D'Imperio, G., Dho, G., Iacoangeli, F., Maccarrone, G., Marafini, M., Mazzitelli, G., Messina, A., Nobrega, R. A., Orlandi, A., Paoletti, E., Passamonti, L., Petrucci, F., Piccolo, D., Pierluigi, D., Pinci, D., Renga, F., Rosatelli, F., Russo, A., Saviano, G., and Tomassini, S.

Subjects
Physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Time projection Chambers (TPC), FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Stability (probability), High Energy Physics - Experiment, 3. Good health, High Energy Physics - Experiment (hep-ex), Gaseous imaging and tracking detectors, Dark Matter detectors (WIMPs Axions Etc.), Micropattern gaseous detectors (MSGC GEM THGEM RETHGEM MHSP MICROPIC MICROMEGAS InGrid Etc), 0103 physical sciences, Optoelectronics, Detection performance, Gaseous imaging and tracking detector, 010306 general physics, business, Instrumentation, Mathematical Physics
Abstract

The performance and long term stability of an optically readout Time Projection Chamber with an electron amplification structure based on three Gas Electron Multipliers was studied. He/CF$_4$ based gas mixtures were used in two different proportions (60/40 and 70/30) in a CYGNO prototype with 7 litres sensitive volume. With electrical configurations providing very similar electron gains, an almost full detection efficiency in the whole detector volume was found with both mixtures, while a light yield about 20\% larger for the 60/40 was found. The electrostatic stability was tested by monitoring voltages and currents during 25 days. The detector worked in very stable and safe condition for the whole period. In the presence of less CF$_4$, a larger probability of unstable events was clearly detected.

Published
2020
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10. Identification of low energy nuclear recoils in a gas time projection chamber with optical readout

Author

Sandro Tomassini, R. A. Nobrega, G. Saviano, E. Paoletti, G. Dho, F. Rosatelli, G. Maccarrone, Antonio Russo, Francesco Iacoangeli, M. Marafini, F. Renga, L. Passamonti, G. D'Imperio, Michele Arturo Caponero, D. Pinci, E. Baracchini, E. Di Marco, Stefano Bianco, G. Mazzitelli, G. Cavoto, Fabrizio Petrucci, Andrea Messina, C. Capoccia, Davide Piccolo, I. A. Costa, A. Orlandi, A.F.V. Cortez, Luisa Benussi, Roberto Tesauro, D. Pierluigi, Baracchini, E, Benussi, L, Bianco, S, Capoccia, C, Caponero, M, Cavoto, G, Cortez, A, A Costa, I, Di Marco, E, D???imperio, G, Dho, G, Iacoangeli, F, Maccarrone, G, Marafini, M, Mazzitelli, G, Messina, A, A Nobrega, R, Orlandi, A, Paoletti, E, Passamonti, L, Petrucci, F, Piccolo, D, Pierluigi, D, Pinci, D, Renga, F, Rosatelli, F, Russo, A, Saviano, G, Tesauro, R, and Tomassini, S

Subjects
Physics, Time projection chamber, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Applied Mathematics, 01 natural sciences, dark matter, Identification (information), Optics, Low energy, instrumentation and detector, image reconstruction algorithms, 0103 physical sciences, 010306 general physics, business, Instrumentation, Engineering (miscellaneous), high-energy physic
Abstract

The search for a novel technology, which is able to detect and reconstruct nuclear recoil events in the keV energy range, has become increasingly important now that vast regions of high mass weakly-interacting-massive-particle–like dark matter candidates have been excluded. Gaseous time projection chambers (TPC) with optical readout are very promising candidates combining the complete event information provided by the TPC technique with the high sensitivity and granularity of the latest generation light sensors. A TPC with an amplification at the anode, obtained with gas electron multipliers (GEMs), was tested at the Laboratori Nazionali di Frascati. Photons and neutrons from radioactive sources were employed to induce recoiling nuclei and electrons with kinetic energy in the range 1–100 keV. A He-CF4 (60/40) gas mixture was used at atmospheric pressure and the light produced during the multiplication in the GEM channels was acquired by a high-position resolution and low-noise complementary metal-oxide semiconductor camera and a photomultiplier. A multi-stage pattern recognition algorithm based on an advanced clustering technique is presented here. A number of cluster-shaped observables are used to identify nuclear recoils induced by neutrons, which originated from a AmBe source against x-ray 55Fe photoelectrons. An efficiency of 18% to detect nuclear recoils with an energy of about 6 keV is reached, while suppressing 96% of the 55Fe photoelectrons, making this optical read-out gas TPC a very promising candidate for future investigations of ultra-rare events such as directional direct dark matter searches.

Published
2020

11. High resolution TPC based on optically readout GEM

Author

Giovanni Mazzitelli, C. Voena, Sandro Tomassini, Davide Pinci, E. Baracchini, G. Cavoto, E. Di Marco, F. Renga, and M. Marafini

Subjects
Physics, GEM, micro-pattern gas detectors, tracking detectors, Nuclear and High Energy Physics, Scintillation, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Hadron, Detector, Dark matter, 01 natural sciences, 010309 optics, Optics, CMOS, 0103 physical sciences, Neutron, Granularity, Sensitivity (control systems), business, Instrumentation
Abstract

Large granularity and high sensitivity commercial CMOS readout systems open the possibility of developing particle detectors with very interesting performance for different applications, from the search of rare and exotics events, such as dark matter directional candidates, to high quality neutron/ion/hadron beam monitor, mainly for medical applications. The gas scintillation mechanisms was exploited for starting an R&D on large TPC-based detector, equipped with a Triple GEM amplification stage optically readout. By this approach, a 7 l sensitive volume detector was built and tested. Space resolutions of 35 μ m on the GEM plane (X, Y) and 100 μ m on Z and energy measurements with a precision of about 25% were obtained. Analysis of the track shapes provides precious information allowing very good particle discrimination.

Published
2019

12. CYGNO: Triple-GEM Optical Readout for Directional Dark Matter Search

Author

Davide Pinci, E. Di Marco, Sandro Tomassini, F. Renga, D. Piccolo, G. Maccarrone, I. Abritta Costa, Luigi Benussi, Michela Marafini, Michele Arturo Caponero, Giovanni Mazzitelli, A. Messina, G. Cavoto, G. Saviano, S. Bianco, R. Bedogni, F. Bellini, G. D'Imperio, E. Baracchini, and Fabrizio Petrucci

Subjects
Physics, History, Physics - Instrumentation and Detectors, business.industry, Physics::Instrumentation and Detectors, Reading (computer), Combined use, Dark matter, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Particle identification, Computer Science Applications, Education, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, Scalability, Multiplication, Sensitivity (control systems), business, Energy (signal processing)
Abstract

CYGNO is a project realising a cubic meter demonstrator to study the scalability of the performance of the optical approach for the readout of large-volume, GEM-equipped TPC. This is part of the CYGNUS proto-collaboration which aims at constructing a network of underground observatories for directional Dark Matter search. The combined use of high-granularity sCMOS and fast sensors for reading out the light produced in GEM channels during the multiplication processes was shown to allow on one hand to reconstruct 3D direction of the tracks, offering accurate energy measurements and sensitivity to the source directionality and, on the other hand, a high particle identification capability very useful to distinguish nuclear recoils. Results of the performed R&D and future steps toward a 30-100 cubic meter experiment will be presented., 6th International Conference on Micro Pattern Gaseous Detectors, MPGD19

Published
2019

13. MPGD Optical Read Out for Directional Dark Matter Search

Author

G. Cavoto, Michela Marafini, Sandro Tomassini, F. Renga, Giovanni Mazzitelli, Davide Pinci, C. Mancini, E. Baracchini, and E. Di Marco

Subjects
Physics - Instrumentation and Detectors, Dark matter, FOS: Physical sciences, 01 natural sciences, Particle identification, High Energy Physics - Experiment, 030218 nuclear medicine & medical imaging, High Energy Physics - Experiment (hep-ex), 03 medical and health sciences, 0302 clinical medicine, Low energy, Optics, Dark Matter interactions, 0103 physical sciences, Projection method, Physics, 010308 nuclear & particles physics, business.industry, Track (disk drive), 3D reconstruction, Instrumentation and Detectors (physics.ins-det), INFN-19-01-LNF, Volume (thermodynamics), Time Projection method, business, Energy (signal processing)
Abstract

The Time Projection method is an ideal candidate to track low energy release particles. Large volumes can be readout by means of a moderate number of channels providing a complete 3D reconstruction of the charged tracks within the sensitive volume. It allows the measurement not only of the total released energy but also of the energy release density along the tracks that can be very useful for particle identification and to solve the head-tail ambiguity of the tracks. Moreover, gas represents a very interesting target to study Dark Matter interactions. In gas, nuclear recoils can travel enough to give rise to tracks long enough to be acquired and reconstructed.

Published
2019
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14. Recoil Directionality Experiment

Author

R. Cereseto, A. de Candia, M. Kuss, M. Carpinelli, Stefano Maria Mari, V. Masone, E. Baracchini, A. Mariani, Giovanni Covone, M. La Commara, G. Testera, M. Cadeddu, M. Arba, Cristiano Galbiati, S. Davini, C. J. Martoff, S. Sanfilippo, C. Giganti, A. Razeto, Luciano Pandola, M. Tuveri, G. Fiorillo, D. Sablone, Marco Pallavicini, Y. Suvorov, C. Cicalo, Hui Wang, D. D'Urso, M. Rescigno, M. Lissia, C. Dionisi, M. Ave, D. Franco, A. Caminata, Marisa Gulino, G. De Filippis, M. Cariello, L. La Delfa, M. Caravati, A. Boiano, W. Bonivento, G. K. Giovannetti, B. Bottino, A. Devoto, G. De Rosa, Vittorio Cataudella, V. Oleynikov, N. Rossi, E. Scapparone, G. Korga, Yuting Wang, S. Catalanotti, P. Agnes, Sanfilippo, S., Agnes, P., Arba, M., Ave, M., Baracchini, E., Boiano, A., Bonivento, W. M., Bottino, B., Cadeddu, M., Caminata, A., Caravati, M., Cariello, M., Carpinelli, M., Catalanotti, S., Cataudella, V., Cereseto, R., Cicalò, C., Covone, G., de Candia, A., De Filippis, G., De Rosa, G., Davini, S., Devoto, A., Dionisi, C., D’Urso, D., Fiorillo, G., Franco, D., Giovannetti, G. K., Giganti, C., Galbiati, C., Gulino, M., Korga, G., Kuss, M., La Commara, M., La Delfa, L., Lissia, M., Mariani, A., Mari, S. M., Martoff, C. J., Masone, V., Oleynikov, V., Pallavicini, M., Pandola, L., Razeto, A., Rescigno, M., Rossi, N., Sablone, D., Scapparone, E., Suvorov, Y., Testera, G., Tuveri, M., Wang, H., Wang, Y., AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), ReD Working Group, Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Antonio Capone, Sanfilippo, Simone, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
Physics, Time projection chamber, detector: performance, 010308 nuclear & particles physics, WIMP, Physics::Instrumentation and Detectors, QC1-999, Dark matter, Detector, sensitivity, time projection chamber: liquid argon, 01 natural sciences, dark matter, Nuclear physics, Recoil, 0103 physical sciences, Liquid argon, DARK-MATTER, Directionality, Frame work, 010306 general physics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], nucleus: recoil
Abstract

International audience; Directional sensitivity to nuclear recoils could provide a smoking gun for a possible discovery of dark matter in the form of WIMPs. A hint of directional dependence of the response of a dual-phase liquid argon Time Projection Chamber was found in the SCENE experiment. Given the potential importance of such a capability in the frame work of dark matter searches, a new dedicated experiment, ReD (Recoil Directionality), was designed in the framework of the DarkSide Collaboration, in order to scrutinize this hint. This contribution will describe the performance of the detectors achieved during the first test-beam, the current status of ReD and the perspectives for physics measurements during the forthcoming beam-time.

Published
2019

15. Study of the Impact of Pre-processing Applied to Images Acquired by the Cygno Experiment

Author

A. Messina, L. Benussi, R. A. Nobrega, G. Cavoto, Giovanni Mazzitelli, Sandro Tomassini, D. Piccolo, S. Bianco, G. Maccarrone, Davide Pinci, F. Bellini, G. S. Lopes, F. Rosatelli, E. Di Marco, F. Renga, I. A. Costa, M. Marafini, E. Baracchini, and D. M. Souza

Subjects
010308 nuclear & particles physics, business.industry, Computer science, Image processing, Digital filters, Particle physics experiment, 010103 numerical & computational mathematics, 01 natural sciences, Preliminary analysis, CMOS, 0103 physical sciences, Computer vision, Artificial intelligence, 0101 mathematics, Image sensor, business, Cluster analysis, Digital filter
Abstract

This work proposes to evaluate the effect of digital filters when applied to images acquired by the ORANGE prototype of the Cygno experiment. A preliminary analysis is presented in order to understand if filtering techniques can produce results that justify investing efforts in the pre-processing stage of those images. Such images come from a camera sensor based on CMOS technology installed in an appropriate gas detector. To perform the proposed work, a simulation environment was created and used to evaluate some of the classical filtering techniques known in the literature. The results showed that the signal-to-noise ratio of the images can be considerably improved, which may help in subsequent processing steps such as clustering and particles identification.

Published
2019

16. Tests of eco-friendly gas mixtures in GEM based detectors with optical readout

Author

F. Renga, L. Benussi, Davide Pinci, D. Piccolo, E. Di Marco, S. Bianco, I. Abritta Costa, F. Iaconageli, F. Bellini, Giovanni Mazzitelli, G. Cavoto, R. Bedogni, M. Marafini, Sandro Tomassini, L. Passamonti, G. Maccarone, D. Pierluigi, G. D'Imperio, A. D. Russo, E. Baracchini, M. Caponero, G. Saviano, F. Petrucci, and A. Messina

Subjects
Materials science, Physics::Instrumentation and Detectors, medical imaging, electron multipliers, 01 natural sciences, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, chemistry.chemical_compound, Electron avalanche, 0302 clinical medicine, Optics, high voltage, Stack (abstract data type), detection efficiency, 0103 physical sciences, gas electron multipliers, operation stability, deterioration, Scintillation, optical readout, Time projection chamber, Freon, 010308 nuclear & particles physics, business.industry, Detector, dark matter searches, sensitive volume, chemistry, key elements, Tetrafluoromethane, Quantum efficiency, business, dark matter searches, detection efficiency, gas electron multipliers, key elements, operation stability, sensitive volume, medical imaging
Abstract

Modern imaging sensors can be used to detect the scintillation light produced in Micro Pattern Gaseous Detectors (MPGDs) during electron avalanche multiplication. Gas mixtures with scintillation light spectra compatible with the quantum efficiency of CCD or CMOS cameras, can be used to implement an optical readout and to build 2D images of the events. Cygno project aims at developing an optical Time Projection Chamber (TPC) for directional dark matter searches and neutrino scattering measurements. A triple GEM stack is used as amplification stage, with the light produced during the multiplication process being detected by a sCMOS camera. The TPC is operated with a mixture of Helium (He) and Tetrafluoromethane (CF4). Recently many freon gases, as the CF4, have been banned due to their high impact on the atmosphere. Our group has started a study to use eco-friendly gases to replace the CF4 in such applications. The setup used to collect data and preliminary results in terms of charge gain and scintillation yield will be presented for some of the more interesting ecological gas mixtures available.

Published
2019

17. Operation stability of a prototype for CYGNO experiment

Author

Davide Piccolo, R. Bedogni, Antonio Russo, E. Paoletti, M. Marafini, I. A. Costa, F. Bellini, G. Maccarone, A. Pelosi, A. Orlandi, D. Pierluigi, A. Apponi, F. Pucci, Stefano Bianco, G. Saviano, Sandro Tomassini, G. Cavoto, Michele Arturo Caponero, D. Pinci, Andrea Messina, G. D'Imperio, G. Mazzitelli, G. Rossi, L. Passamonti, C. Capoccia, Fabrizio Petrucci, Luisa Benussi, Francesco Iacoangeli, F. Renga, E. Baracchini, and E. Di Marco

Subjects
010308 nuclear & particles physics, Computer science, Detector, High voltage, Dead time, 01 natural sciences, Stability (probability), Reliability (semiconductor), Volume (thermodynamics), 0103 physical sciences, deterioration, electron multipliers, dark matter searches, detection efficiency, gas electron multipliers, high voltage, key elements, operation stability, optical readout, sensitive volume, medical imaging, 010306 general physics, Simulation, Voltage
Abstract

CYGNO experiment is working at the construction of one cubic meter TPC, based on Optical Readout of Gas Electron Multipliers (GEMs), for Directional Dark Matter search. This kind of research demands for very long dataacquisition runs and thus for high operation stability and reliability. This is one of the key elements of INITIUM project (ERC-2018-COG). The performance of such an approach was studied with a 7 liter sensitive volume detector. The detector was kept operative for 10 days in the working conditions able to provide full detection efficiency while continuously monitoring voltages and currents. Even if a few times per day the current drawn by the detector started to increase, these events could be recovered by an automated high voltage cycle. Dead time introduced by these procedures was evaluated to be lesser than 6% and the operation of the detector did not show any deterioration during the 10 days of the test.

Published
2019

18. Performance of Prototype of Optically Readout TPC with a 55Fe source

Author

I. Abritta Costa, F. Renga, G. Maccarrone, Stefano Bianco, G. Cavoto, F. Rosatelli, D. Pinci, G. Saviano, E. Baracchini, M. Marafini, G. Mazzitelli, Michele Arturo Caponero, Luisa Benussi, Andrea Messina, E. Di Marco, F. Bellini, Davide Piccolo, and Sandro Tomassini

Subjects
Physics, History, Physics::Instrumentation and Detectors, dark matter, gas time projection chamber, Computer Science Applications, Education
Abstract

The performances of an optical readout of Time Projection Chambers (TPCs) with multiple Gas Electron Multipliers (GEMs) amplification stages are presented. The detector is characterized by using 55Fe photons converting inside a 7 litre sensitive volume detector in different electric field configurations. This prototype is developed as part of the R&D for the CYGNO project for an application to direct Dark Matter search by detection of tracks of nuclear recoils in the gas within the keV energy range.

Published
2020

19. Micro pattern gas detector optical readout for directional dark matter searches

Author

F. Rosatelli, T. N. Thorpe, Stefano Loreti, C. Voena, Massimo Angelone, I. Abritta, D. Pinci, Stefano Bianco, Sandro Tomassini, Andrea Messina, F. Bellini, E. Baracchini, E. Di Marco, M. Marafini, S. Fiore, Davide Piccolo, G. Maccarone, G. Cavoto, Luisa Benussi, Mario Pillon, F. Renga, G. Mazzitelli, Cavoto, G., Abritta, I., Baracchini, E., Angelone, M., Bellini, F., Benussi, L., Bianco, S., Di Marco, E., Fiore, S., Loreti, S., Maccarone, G., Marafini, M., Mazzitelli, G., Messina, A., Piccolo, D., Pillon, M., Pinci, D., Renga, F., Rosatelli, F., Thorpe, T., Tomassini, S., and Voena, C.

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Micro-pattern gas detectors, GEM, Dark matter, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Kinetic energy, 01 natural sciences, Charged particle, Particle identification, Optics, 0103 physical sciences, Neutron source, Gas detector, 010306 general physics, business, Instrumentation, Energy (signal processing)
Abstract

The Time Projection method is ideal to track low kinetic energy charged particles, in particular for the study for Dark Matter interactions. With this technique we aim to readout large volumes with a moderate number of channels providing a complete 3D reconstruction of the tracks within the sensitive region. The total released energy and the energy density along the tracks can be both measured allowing for particle identification and to solve the head–tail ambiguity of the track. Moreover, in gas, nuclear recoils induced by a Dark Matter particle scattering can yield tracks long enough for its direction to be inferred. We describe here a prototype TPC with a GEM amplification stage. The readout is based on the detection of the light produced in the GEM with a high granularity sCMOS sensor in conjunction with a photomultiplier. The prototype was exposed to γ and neutron source and to minimum ionizing particles, obtaining very promising results in terms of detection efficiency, energy resolution and particle identification.

Published
2020

20. CYGNO a CYGNUs Collaboration 1 m3 Module with Optical Readout for Directional Dark Matter Search

Author

F. Renga, R. Gregorio, N. J. C. Spooner, W. A. Lynch, G. Maccarrone, Davide Pinci, Kentaro Miuchi, A. C. Ezeribe, C. Eldridge, R. Bedogni, Davide Piccolo, N. Phan, T. N. Thorpe, F. Bellini, Stefano Bianco, G. Cavoto, M. Marafini, G. Mazzitelli, D. Loomba, T. Gamble, F. Petrucci, Gregory Lane, A. Mills, Lindsey J. Bignell, E. Baracchini, Andrea Messina, Luisa Benussi, Sandro Tomassini, S. E. Vahsen, R. Gargana, and E. Di Marco

Subjects
Physics, Time projection chamber, 010308 nuclear & particles physics, business.industry, Scattering, Dark matter, 01 natural sciences, Particle identification, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Optics, Observatory, 0103 physical sciences, Focus (optics), business, Projection (set theory), Image resolution
Abstract

The design of the project named CYGNO is presented. CYGNO is a new proposal supported by INFN, the Italian National Institute for Nuclear Physics, within CYGNUs proto-collaboration (CYGNUS-TPC) that aims to realize a distributed observatory in underground laboratories for directional Dark Matter (DM) search and the identification of the coherent neutrino scattering (CNS) from the Sun. CYGNO is one of the first prototypes in the road map to 100-1000 m3 of CYGNUs and will be located at the National Laboratory of Gran Sasso (LNGS), in Italy, aiming to make significant advances in the technology of single phase gas-only time projection chambers (TPC) for the application to the detection of rare scattering events. In particular it will focus on a read-out technique based on Micro Pattern Gas Detector (MPGD) amplification of the ionization and on the visible light collection with a sub-mm position resolution sCMOS (scientific COMS) camera. This type of readout - in conjunction with a fast light detection - will allow on one hand to reconstruct 3D direction of the tracks, offering accurate sensitivity to the source directionality and, on the other hand, a high particle identification capability very useful to distinguish nuclear recoils.

Published
2018

21. The design of the MEG II experiment: MEG II Collaboration

Author

G. Cavoto, Stefan Ritt, P. W. Cattaneo, A. D’Onofrio, F. Morsani, Yu.V. Yudin, C. Voena, Masatoshi Maki, K. Ieki, S. Nakaura, Flavio Gatti, T. Libeiro, A. S. Korenchenko, F. Berg, Marco Francesconi, Ryu Sawada, G. F. Tassielli, A. Mtchedilishvili, F. Ignatov, D. Nicolò, C. Bemporad, G. Chiarello, Fabrizio Cei, A. Papa, D. N. Grigoriev, G. Signorelli, Nobuo Matsuzawa, M. Usami, Marco Grassi, Toshinori Mori, M. Simonetta, Andrey Popov, L. Galli, M. Nakao, P.-R. Kettle, A. Pepino, N. P. Kravchuk, Hajime Nishiguchi, A. de Bari, B.I. Khazin, Yusuke Uchiyama, F. Raffaelli, T. Iwamoto, W. R. Molzon, N. V. Khomutov, E. Baracchini, Satoshi Mihara, M. Panareo, D. Kaneko, Y. Zhang, S. Ogawa, A. Corvaglia, Kayo Yoshida, Malte Hildebrandt, G. Piredda, A. M. Baldini, M. Milgie, Wataru Ootani, M. De Gerone, C. Chiri, M. Rossella, Z. Hodge, R. Iwai, Yuki Fujii, Katsuyu Kasami, M. Venturini, M. Nishimura, Gianluigi Boca, F. Grancagnolo, F. Renga, Michele Biasotti, M. Chiappini, G. Rutar, E. Ripiccini, G. Cocciolo, Baldini, A. M., Baracchini, E., Bemporad, C., Berg, F., Biasotti, M., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Chiappini, M., Chiarello, G., Chiri, C., Cocciolo, G., Corvaglia, A., de Bari, A., De Gerone, M., D’Onofrio, A., Francesconi, M., Fujii, Y., Galli, L., Gatti, F., Grancagnolo, F., Grassi, M., Grigoriev, D. N., Hildebrandt, M., Hodge, Z., Ieki, K., Ignatov, F., Iwai, R., Iwamoto, T., Kaneko, D., Kasami, K., Kettle, P. -R., Khazin, B. I., Khomutov, N., Korenchenko, A., Kravchuk, N., Libeiro, T., Maki, M., Matsuzawa, N., Mihara, S., Milgie, M., Molzon, W., Mori, Toshinori, Morsani, F., Mtchedilishvili, A., Nakao, M., Nakaura, S., Nicolò, D., Nishiguchi, H., Nishimura, M., Ogawa, S., Ootani, W., Panareo, M., Papa, A., Pepino, A., Piredda, G., Popov, A., Raffaelli, F., Renga, F., Ripiccini, E., Ritt, S., Rossella, M., Rutar, G., Sawada, R., Signorelli, G., Simonetta, M., Tassielli, G. F., Uchiyama, Y., Usami, M., Venturini, M., Voena, C., Yoshida, K., Yudin, Yu. V., and Zhang, Y.

Subjects
SUSY SO(10), Physics and Astronomy (miscellaneous), High Energy Pysics, muons, charged lepton flavor violation, particles detectors, LEPTON-FLAVOR VIOLATION, SUPERSYMMETRIC STANDARD MODEL, SCINTILLATION-COUNTERS, PLASTIC SCINTILLATOR, UNIFIED THEORIES, TIME RESOLUTION, NEUTRINO-MASS, HIGGS-BOSON, 50 PS, 01 natural sciences, Muon Decay Violating Decay, Nuclear physics, 0103 physical sciences, Sensitivity (control systems), Engineering (miscellaneous), 010306 general physics, Physics, 010308 nuclear & particles physics, Branching fraction, Detector, Gamma ray, Upgrade, Order of magnitude
Abstract

The MEG experiment, designed to search for the μ+→e+γ decay, completed data-taking in 2013 reaching a sensitivity level of 5.3×10^−13 for the branching ratio. In order to increase the sensitivity reach of the experiment by an order of magnitude to the level of 6×10^−14, a total upgrade, involving substantial changes to the experiment, has been undertaken, known as MEG II. We present both the motivation for the upgrade and a detailed overview of the design of the experiment and of the expected detector performance

Published
2018

22. Gas distribution and monitoring for the drift chamber of the MEG II experiment

Author

E. Ripiccini, F. Grancagnolo, M. Meucci, A. M. Baldini, E. Baracchini, M. Panareo, C. Chiri, G. F. Tassielli, M. Hildebrandt, F. Renga, F. Raffaelli, A. Papa, G. Chiarello, B. Pruneti, Fabrizio Cei, V. Martinelli, Marco Grassi, L. Galli, A. Pepino, D. Nicoló, G. Cavoto, Marco Francesconi, C. Voena, M. Chiappini, G. Signorelli, Baldini, A. M., Baracchini, E., Cavoto, G., Cei, F., Chiappini, M., Chiarello, G., Chiri, C., Francesconi, M., Galli, L., Grancagnolo, F., Grassi, M., Hildebrandt, M., Martinelli, V., Meucci, M., Nicolò, D., Panareo, M., Papa, A., Pepino, A., Pruneti, B., Raffaelli, F., Renga, F., Ripiccini, E., Signorelli, G., Tassielli, G. F., and Voena, C.

Subjects
Wire chambers (MWPC, Materials science, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, 01 natural sciences, Particle detector, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Gaseous detectors, Positron, 0103 physical sciences, Gas systems and purification, Wire chambers (MWPC, Thin-gap chambers, drift chambers, drift tubes, proportional chambers etc), Instrumentation, Mathematical Physics, Gaseous detector, drift chambers, 010306 general physics, Helium, drift tubes, Muon, 010308 nuclear & particles physics, Detector, Thin-gap chambers, Instrumentation and Detectors (physics.ins-det), Computational physics, chemistry, Townsend discharge, proportional chambers etc), Measuring instrument, Radioactive decay
Abstract

The reconstruction of the positron trajectory in the MEG-II experiment searching for the $\mu^+ \to e^+ \gamma$ decay uses a cylindrical drift chamber operated with a helium-isobutane gas mixture. A stable performance of the detector in terms of its electron drift properties, avalanche multiplication, and with a gas mixture of controlled composition and purity has to be provided and continuously monitored. In this paper we describe the strategies adopted to meet the requirements imposed by the target sensitivity of MEG-II, including the construction and commissioning of a small chamber for an online monitoring of the gas quality., Comment: 12 pages, 6 figures, submitted to Journal of Instrumentation

Published
2018

23. Negative Ion Time Projection Chamber operation with SF6at nearly atmospheric pressure

Author

F. Murtas, G. Mazzitelli, Sandro Tomassini, E. Baracchini, G. Cavoto, and F. Renga

Subjects
Physics - Instrumentation and Detectors, Drift velocity, Materials science, Physics::Instrumentation and Detectors, FOS: Physical sciences, chemistry.chemical_element, Context (language use), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Ion, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Detectors and Experimental Techniques, 010306 general physics, physics.ins-det, Instrumentation, Mathematical Physics, Helium, Time projection chamber, Atmospheric pressure, hep-ex, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), chemistry, Torr, Gas electron multiplier, Atomic physics, Dark Matter detectors (WIMPs, axions, etc.), Gaseous imaging and tracking detectors, Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc), Time projection chambers, Particle Physics - Experiment
Abstract

We present the measurement of negative ion drift velocities and mobilities for innovative particle tracking detectors using gas mixtures based on SF6. This gas has recently received attention in the context of directional Dark Matter searches, thanks to its high Fluorine content, reduced diffusion and multiple species of charge carriers, which allow for full detector fiducialization. Our measurements, performed with a 5 cm drift distance Negative Ion Time Projection Chamber, show the possibility of negative ion operation in pure SF6 between 75 and 150 Torr with triple thin GEM amplification, confirming the attractive potentialities of this gas. Above all, our results with the mixture He:CF4:SF6 360:240:10 Torr demonstrate for the first time the feasibility of SF6− negative ion drift and gas gain in He at nearly atmospheric pressure, opening very interesting prospects for the next generation of directional Dark Matter detectors. We present measurements of drift velocities and mobilities of some innovative negative ion gas mixtures at nearly atmospheric pressure based on SF$_{6}$ as electronegative capture agent and of pure SF$_{6}$ at various pressures, performed with the NITEC detector. NITEC is a Time Projection Chamber with 5 cm drift distance readout by a GEMPix, a triple thin GEMs coupled to a Quad-Timepix chip, directly sensitive to the deposited charge on each of the 55 $\times$ 55 $\mu$m$^2$ pixel. Our results contribute to expanding the knowledge on the innovative use of SF$_{6}$ as negative ion gas and extend to triple thin GEMs the possibility of negative ion operation for the first time. Above all, our findings show the feasibility of negative ion operation with He:CF$_4$:SF$_{6}$ at 610 Torr, opening extremely interesting possibility for next generation directional Dark Matter detectors at 1 bar.

Published
2018

24. A Silicon-Based Cosmic Ray Telescope as an External Tracker to Measure Detector Performance

Author

G. Signorelli, J. J. Walsh, Fabio Morsani, Donato Nicolo, E. Baracchini, F. Tenchini, M. Venturini, S. Bettarini, S. Dussoni, E. Cavallaro, M. Minuti, Filippo Bosi, and Luca Galli

Subjects
Physics, Nuclear and High Energy Physics, business.industry, Detector, Electrical engineering, BaBar experiment, Tracking (particle physics), Instrumentation and measurement ionizing radiation sensors nuclear measurement particle tracking sensors radiation detectors semiconductor radiation detectors, law.invention, Semiconductor detector, Telescope, Optics, Data acquisition, Nuclear Energy and Engineering, law, Gate array, Personal computer, Electrical and Electronic Engineering, business
Abstract

High-energy physics experiments at the high-intensity frontier place ever-greater demands on detectors, and in particular on tracking devices. In order to compare the performance of many possible small-size tracking prototypes, a high-resolution cosmic ray tracker may be used as an external track reference. We have constructed a telescope by assembling four spare ladders of the external layers of the Silicon Vertex Tracker of the BaBar experiment. This test facility, operating at INFN Sezione di Pisa, provides the detector under test with an external track with an intrinsic resolution of 15–30 $~\mu\hbox{m}$ . The DAQ originally used in the BaBar experiment was replaced by custom-designed boards coupled with an acquisition front-end personal computer through commercial field-programmable gate array evaluation boards. We show that the facility is operative, and we present the performance in terms of tracking resolution and efficiency. A first device has been characterized, and some plots from the analysis demonstrating the telescope performance are shown.

Published
2015

25. MEG II drift chamber characterization with the silicon based cosmic ray tracker at INFN Pisa

Author

Marco Grassi, A. M. Baldini, E. Baracchini, S. Dussoni, M. Venturini, A. D׳Onofrio, Fabrizio Cei, Donato Nicolo, Giovanni Signorelli, and Luca Galli

Subjects
Nuclear and High Energy Physics, Tracking resolution, Instrumentation, Drift chamber, Gas detectors, Silicon detectors, BaBar experiment, Cosmic ray, Tracking (particle physics), 01 natural sciences, law.invention, Nuclear physics, Telescope, Optics, law, 0103 physical sciences, 010306 general physics, Physics, 010308 nuclear & particles physics, business.industry, Track (disk drive), Resolution (electron density), Detector, business
Abstract

High energy physics experiments at the high intensity frontier place ever greater demands on detectors, and in particular on tracking devices. In order to compare the performance of small size tracking prototypes, a high resolution cosmic ray tracker has been assembled to provide an external track reference. It consists of four spare ladders of the external layers of the Silicon Vertex Tracker of the BaBar experiment. The test facility, operating at INFN Sezione di Pisa, provides the detector under test with an external track with an intrinsic resolution of 15–30 μm. The MEG II tracker is conceived as a unique volume wire drift chamber filled with He–isobutane 85–15%. The ionization density in this gas mixture is about 13 clusters/cm and this results in a non-negligible bias of the impact parameters for tracks crossing the cell close to the anode wire. We present the telescope performance in terms of tracking efficiency and resolution and the results of the characterization of a MEG II drift chamber prototype.

Published
2016

26. A high resolution TPC based on GEM optical readout

Author

V. C. Antochi, G. Cavoto, E. Baracchini, E. Di Marco, C. Voena, A. De Stena, G. Mazzitelli, M. Marafini, D. Pinci, F. Renga, and Sandro Tomassini

Subjects
Physics, Scintillation, Photomultiplier, Time projection chamber, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Detector, 01 natural sciences, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Optics, 0103 physical sciences, Gas electron multiplier, Neutron detection, Focal length, business, Image resolution
Abstract

The R&D work of a gas detector for high precision particle tracking over large gas volumes is presented. The scintillation light accompanying the electronic avalanches in a triple GEM structure is detected by a CMOS-based camera. The sensor provides a high granularity along with low noise and a very high sensitivity (70% of quantum efficiency). Once operated with a large aperture and suitable focal length lens, large areas can be imaged at reduced costs. The performance of a prototype (called LEMOn), with a 7 litre sensitive volume, operated with a He/CF 4 (60/40) mixture was studied on a 450 MeV electron beam and preliminary results are presented. A space resolution on the plane parallel to the GEM $(X, Y)$ of $90 \mu m$ was achieved in the whole sensitive volume. The effect of the electron diffusion on the drift was studied and exploited in order to evaluate the position in $Z$ of the tracks. An innovative element is the concurrent readout of the light with a suitable photomultiplier system. It will complement the CMOS-readout by providing the time resolution necessary to the reconstruction of third coordinate of each cluster. By exploiting the time information, a resolution of $60 \mu m$ on $Z$ was measured. Such a detector can be an interesting candidate for future large scale experiments searching for Dark Matter (DM) searches with directional sensitivity and for measurements of coherent neutrino scattering on nuclei. Additional applications of this detector might be in the realm of neutron detection, X-ray polarimetry and particle cancer therapy.

Published
2017

27. Muon polarization in the MEG experiment: predictions and measurements

Author

A. M. Baldini, Akira Yamamoto, Z. You, M. De Gerone, W. R. Molzon, Malte Hildebrandt, Z. Hodge, B.I. Khazin, Marco Grassi, G. Chiarello, D. N. Grigoriev, Yu Bao, A. Mtchedlishvili, K. Ieki, S. Nakaura, A. Pepino, G. F. Tassielli, G. Cavoto, A. de Bari, T. I. Kang, P. W. Cattaneo, Hajime Nishiguchi, F. Berg, F. Renga, E. Baracchini, Flavio Gatti, A. Papa, Yuki Fujii, Yusuke Uchiyama, T. Haruyama, S. Ogawa, T. Iwamoto, M. Rossella, Andrey Popov, Michele Biasotti, G. M. A. Lim, L. Galli, S. Dussoni, A. S. Korenchenko, G. Pizzigoni, P.-R. Kettle, G. Rutar, E. Ripiccini, F. Grancagnolo, A. D’Onofrio, N. V. Khomutov, Wataru Ootani, Stefan Ritt, N. P. Kravchuk, D. Nicolò, C. Voena, A. Graziosi, F. Ignatov, K. Yoshida, M. Venturini, D. Kaneko, Ryu Sawada, F. Tenchini, G. Piredda, Satoshi Mihara, G. Signorelli, Yu.V. Yudin, M. Nishimura, F. Sergiampietri, Gianluigi Boca, Fabrizio Cei, C. Chiri, M. Panareo, C. Bemporad, and Toshinori Mori

Subjects
Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Order (ring theory), 7. Clean energy, 01 natural sciences, Standard Model, Massless particle, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Production (computer science), Neutrino, 010306 general physics, Engineering (miscellaneous), Energy (signal processing), Lepton
Abstract

The MEG experiment makes use of one of the world's most intense low energy muon beams, in order to search for the lepton flavour violating process $\mu^{+} \rightarrow {\rm e}^{+} \gamma$. We determined the residual beam polarization at the thin stopping target, by measuring the asymmetry of the angular distribution of Michel decay positrons as a function of energy. The initial muon beam polarization at the production is predicted to be $P_{\mu} = -1$ by the Standard Model (SM) with massless neutrinos. We estimated our residual muon polarization to be $P_{\mu} = -0.85 \pm 0.03 ~ {\rm (stat)} ~ { }^{+ 0.04}_{-0.05} ~ {\rm (syst)}$ at the stopping target, which is consistent with the SM predictions when the depolarizing effects occurring during the muon production, propagation and moderation in the target are taken into account. The knowledge of beam polarization is of fundamental importance in order to model the background of our ${\megsign}$ search induced by the muon radiative decay: $\mu^{+} \rightarrow {\rm e}^{+} \bar{\nu}_{\mu} \nu_{\rm e} \gamma$.

Published
2016

28. Readout technologies for directional WIMP Dark Matter detection

Author

J. A. Kadyk, T. N. Thorpe, A. Buonaura, H. Nishimura, Giuliana Galati, M. T. Hedges, Gabriela Druitt, Kentaro Miuchi, Ken'ichi Kuge, Hiroyuki Sekiya, M. Garcia-Sciveres, T. Hashimoto, L. Consiglio, H. Mirallas, Toru Tanimori, M. Tanaka, P. Monacelli, S. E. Vahsen, Javier Galan, Tetsuya Mizumoto, J. P. Lopez, T. Asada, G. De Lellis, A. Takada, I. G. Irastorza, O. Guillaudin, M. Ali Guler, M. Yoshimoto, A. B. Aleksandrov, Jerome Bouvier, T. Dafni, Maria Cristina Montesi, N. J. C. Spooner, F. Mayet, Philip Lewis, F.J. Iguaz, J. Lamblin, N. Di Marco, V. Gentile, T. Papevangelou, Ryosuke Taishaku, Adele Lauria, Natalia Guerrero, H. Tomita, Q. Riffard, J. P. Richer, Valeri Tioukov, S. Komura, Cosmin Deaconu, Y. Giomataris, Joseph D. Parker, Tatsuya Sawano, Daniel P. Snowden-Ifft, I. Jaegle, S. Cebrián, D. Loomba, Jocelyn Monroe, G. Bosson, Gianfranca De Rosa, A. Umemoto, E. Zayas, Taishi Katsuragawa, H. Kubo, Ihn Sik Seong, Nicola D'Ambrosio, Tatsuhiro Naka, P. Colas, J. Billard, F. Pupilli, E. R. Lee, Y. Mizumura, Koji Nakamura, O. Bourrion, Y. Yamaguchi, James Battat, D. Santos, E. Ferrer-Ribas, J. A. Garcia, Richard Eggleston, J. L. Harton, G. Luzón, M. Leyton, J. G. Garza, Atsuhiko Ochi, A. Di Crescenzo, K. Burdge, T. Descombes, A. Sugiyama, Takahiro Fusayasu, N. S. Phan, E. Baracchini, T. Ikeda, A. Takeda, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), MIMAC, Battat, J. B. R., Irastorza, I. G., Aleksandrov, A., Asada, T., Baracchini, E., Billard, J., Bosson, G., Bourrion, O., Bouvier, J., Buonaura, Annarita, Burdge, K., Cebrián, S., Colas, P., Consiglio, L., Dafni, T., D’Ambrosio, N., Deaconu, C., DE LELLIS, Giovanni, Descombes, T., DI CRESCENZO, Antonia, Di Marco, N., Druitt, G., Eggleston, R., Ferrer Ribas, E., Fusayasu, T., Galán, J., Galati, Giuliana, García, J. A., Garza, J. G., Gentile, V., Garcia Sciveres, M., Giomataris, Y., Guerrero, N., Guillaudin, O., Guler, A. M., Harton, J., Hashimoto, T., Hedges, M. T., Iguaz, F. J., Ikeda, T., Jaegle, I., Kadyk, J. A., Katsuragawa, T., Komura, S., Kubo, H., Kuge, K., Lamblin, J., Lauria, Adele, Lee, E. R., Lewis, P., Leyton, M., Loomba, D., Lopez, J. P., Luzón, G., Mayet, F., Mirallas, H., Miuchi, K., Mizumoto, T., Mizumura, Y., Monacelli, P., Monroe, J., Montesi, MARIA CRISTINA, Naka, T., Nakamura, K., Nishimura, H., Ochi, A., Papevangelou, T., Parker, J. D., Phan, N. S., Pupilli, F., Richer, J. P., Riffard, Q., Rosa, G., Santos, D., Sawano, T., Sekiya, H., Seong, I. S., Snowden Ifft, D. P., Spooner, N. J. C., Sugiyama, A., Taishaku, R., Takada, A., Takeda, A., Tanaka, M., Tanimori, T., Thorpe, T. N., Tioukov, V., Tomita, H., Umemoto, A., Vahsen, S. E., Yamaguchi, Y., Yoshimoto, M., Zayas, E., Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics - Instrumentation and Detectors, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics::Instrumentation and Detectors, Dark matter, General Physics and Astronomy, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Recoil, Optics, WIMP, 0103 physical sciences, High spatial resolution, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Signature (logic), 3. Good health, business, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The measurement of the direction of WIMP-induced nuclear recoils is a compelling but technologically challenging strategy to provide an unambiguous signature of the detection of Galactic dark matter. Most directional detectors aim to reconstruct the dark-matter-induced nuclear recoil tracks, either in gas or solid targets. The main challenge with directional detection is the need for high spatial resolution over large volumes, which puts strong requirements on the readout technologies. In this paper we review the various detector readout technologies used by directional detectors. In particular, we summarize the challenges, advantages and drawbacks of each approach, and discuss future prospects for these technologies., Comment: 58 pages, 26 figures, accepted by Physics Reports

Published
2016

29. Single-hit resolution measurement with MEG II drift chamber prototypes

Author

Fabrizio Cei, M. Venturini, E. Ripiccini, C. Chiri, Marco Grassi, V. Martinelli, E. Baracchini, F. Renga, A. Pepino, F. Tenchini, G. Piredda, G. Chiarello, M. Chiappini, Michele Cascella, L. Galli, S. Dussoni, A. M. Baldini, C. Voena, G. F. Tassielli, D. Nicoló, F. Grancagnolo, G. Signorelli, G. Cavoto, M. Panareo, Baldini, A. M., Baracchini, E., Cavoto, G., Cascella, M., Cei, F., Chiappini, M., Chiarello, Gianluigi, Chiri, Claudio, Dussoni, S., Galli, L., Grancagnolo, F., Grassi, M., Martinelli, V., Nicolò, D., Panareo, Marco, Pepino, Aurora, Piredda, G., Renga, F., Ripiccini, E., Signorelli, G., Tassielli, GIOVANNI FRANCESCO, Tenchini, F., Venturini, M., and Voena, C.

Subjects
Materials science, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, Cosmic ray, muon decay, Tracking (particle physics), lepton flavour violation, 01 natural sciences, Particle detector, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, Ionization, 0103 physical sciences, 010306 general physics, Instrumentation, Image resolution, Mathematical Physics, Helium, 010308 nuclear & particles physics, business.industry, Drift chambers, primary ionisation, MEG, tracker, hit resolution, Instrumentation and Detectors (physics.ins-det), Charged particle, chemistry, Measuring instrument, business
Abstract

Drift chambers operated with helium-based gas mixtures represent a common solution for tracking charged particles keeping the material budget in the sensitive volume to a minimum. The drawback of this solution is the worsening of the spatial resolution due to primary ionisation fluctuations, which is a limiting factor for high granularity drift chambers like the MEG II tracker. We report on the measurements performed on three different prototypes of the MEG II drift chamber aimed at determining the achievable single-hit resolution. The prototypes were operated with helium/isobutane gas mixtures and exposed to cosmic rays, electron beams and radioactive sources. Direct measurements of the single hit resolution performed with an external tracker returned a value of 110 $\mu$m, consistent with the values obtained with indirect measurements performed with the other prototypes., Comment: 18 pages, 18 figures

Published
2016
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30. Ageing tests for the MEG II drift chamber

Author

A. D׳Onofrio, F. Tenchini, A. M. Baldini, Fabrizio Cei, Marco Grassi, Donato Nicolo, E. Baracchini, Giovanni Signorelli, Luca Galli, M. Venturini, A. Zermini, and S. Dussoni

Subjects
Physics, Ageing tests, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Track (disk drive), Nuclear engineering, 01 natural sciences, 030218 nuclear medicine & medical imaging, Nuclear physics, X-ray source, 03 medical and health sciences, Tracking detectors, 0302 clinical medicine, Robustness (computer science), Drift chamber, 0103 physical sciences, Instrumentation, Instrumentation (computer programming)
Abstract

The MEG II drift chamber will track positrons from μ+ decays in a very harsh environment. For testing the robustness of the chamber to ageing effects an irradiation facility was set up at INFN Pisa.

Published
2016

31. New limit on Lepton Flavour Violation searches from the MEG experiment

Author

E. Baracchini

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Muon, Likelihood analysis, Branching fraction, Flavour, Limit (mathematics), Atomic and Molecular Physics, and Optics, Lepton
Abstract

We present here the latest result from the MEG experiment, based on the data collected at the Paul Scherrer Institut (PSI) in 2009 and 2010 in search of the Lepton Flavour Violating (LFV) process μ + → e + γ . The likelihood analysis of the combined data sample of the two years (which corresponds to a total of 1.8 × 10 14 muon decays on target) provides a 90% confidence level upper limit of 2.4 × 10 − 12 on the branching ratio of the μ + → e + γ decay, which is the most stringent limit to date.

Published
2012

32. Calibration and monitoring of the MEG experiment by a proton beam from a Cockcroft–Walton accelerator

Author

D.N. Grigoriev, M. Rossella, P.-R. Kettle, Luca Galli, A. M. Baldini, Marco Grassi, Flavio Gatti, A. de Bari, Tomiyoshi Haruyama, R. Pazzi, J. Adam, Stefan Ritt, N. P. Kravchuk, M. Panareo, W. R. Molzon, H. Natori, M. Corbo, Donato Nicolo, G. Gallucci, E. Baracchini, D. Mzavia, Fedor Ignatov, Satoshi Mihara, Hajime Nishiguchi, Gianluigi Boca, Tadayoshi Doke, T. Iwamoto, P. W. Cattaneo, M. De Gerone, C. Topchyan, C. Voena, B. Golden, K. Fratini, J. Egger, X. Bai, A. Maki, Malte Hildebrandt, Yu.V. Yudin, N. Curalli, Angela Papa, Yasuhiro Nishimura, C. Cerri, O. Kiselev, A. S. Korenchenko, Wataru Ootani, R. Valle, B.I. Khazin, Akira Yamamoto, Ryu Sawada, Fabrizio Cei, C. Bemporad, F. Renga, A.S. Popov, Giovanni Signorelli, F. Sergiampietri, Yuki Fujii, G. Cavoto, F. Tenchini, G. Piredda, D. Zanello, F. Xiao, Takehiko Mori, Yusuke Uchiyama, and S. Dussoni

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Muon, Spectrometer, Proton, Branching fraction, Particle accelerator, law.invention, Calorimeter, γrays, Beam monitoring, Calibration, CockcroftWalton accelerator, Instrumentation, Nuclear physics, law, Nucleon
Abstract

The MEG experiment at PSI searches for the decay μ → e γ at a level of ≈ 10 − 13 on the branching ratio BR ( μ → e γ / μ → tot ), well beyond the present experimental limit ( BR ≤ 1.2 × 10 − 11 ) and is sensitive to the predictions of SUSY-GUT theories. To reach this goal the experiment uses one of the most intense continuous surface muon beams available ( ≈ 10 8 μ / s ) and relies on advanced technology (LXe calorimetry, a gradient-field superconducting spectrometer as well as flexible and powerful trigger and acquisition systems). In order to maintain the highest possible energy, time and spatial resolutions for such detector, frequent calibration and monitoring, using a Cockcroft–Walton proton accelerator, are required. The proton beam is brought to the centre of MEG by a special bellows insertion system and travels in a direction opposite to the one of the normal μ ‐ beam . Protons interact with a lithium tetraborate (Li2B4O7) nuclear target and produce one γ (17.6 MeV) from the reaction Li ( p , γ ) 3 7 Be 4 8 or two coincident γ s (11.67 and 4.4 MeV) from the reaction B ( p , γ 1 ) 5 11 C ⁎ 6 12 . The 17.6 MeV γ is used for calibrating and monitoring the LXe calorimeter ( σ E γ / E γ = 3.85 ± 0.15 % at 17.6 MeV) while the coincident 11.67 and 4.4 MeV γ s are used to measure the relative timing of the calorimeter and the spectrometer timing counters ( σ Δ t = 0.450 ± 0.015 ns ).

Published
2011

33. A limit for the decay from the MEG experiment

Author

E. Baracchini, Stefan Ritt, J. Egger, N.P. Kravchuk, F. Xiao, M. Hildebrandt, H. Natori, R. Pazzi, C. Bemporad, Yusuke Uchiyama, A. M. Baldini, G. Piredda, S. Yamada, B. I. Khazin, P.-R. Kettle, Y. Nishimura, G. Gallucci, Y. Hisamatsu, A. Korenchenko, D.N. Grigoriev, A. de Bari, Tomiyoshi Haruyama, Flavio Gatti, M. Panareo, Roberto Di Nardo, F. Ignatov, C. Topchyan, S. Dussoni, V. Tumakov, Satoshi Mihara, M. De Gerone, J. Adam, Hajime Nishiguchi, G. Cecchet, Martin Schneebeli, O. Kiselev, S. Suzuki, C. Cerri, D. Kaneko, R. Valle, G. Cavoto, Ryu Sawada, B. Golden, D. Zanello, G. Boca, Fabrizio Cei, P. W. Cattaneo, W. R. Molzon, C. Voena, T. Iwamoto, L. Galli, T. Doke, A. Barchiesi, A.S. Popov, Angela Papa, D. Mzavia, F. Sergiampietri, Wataru Ootani, A. Maki, Giovanni Signorelli, X. Bai, S. Yamashita, Yu.V. Yudin, M. Grassi, Akira Yamamoto, Toshinori Mori, Donato Nicolo, F. Renga, and Massimo Rossella

Subjects
Superconductivity, Physics, Nuclear and High Energy Physics, Photon, Spectrometer, Branching fraction, Physics::Medical Physics, Analytical chemistry, chemistry.chemical_element, Calorimeter, Nuclear physics, Positron, Xenon, chemistry, High Energy Physics::Experiment, Limit (mathematics), Lepton flavour violation, Muon decay
Abstract

A search for the decay μ + → e + γ , performed at PSI and based on data from the initial three months of operation of the MEG experiment, yields an upper limit on the branching ratio of BR ( μ + → e + γ ) ⩽ 2.8 × 10 − 11 (90% C.L.). This corresponds to the measurement of positrons and photons from ∼ 10 14 stopped μ + -decays by means of a superconducting positron spectrometer and a 900 litre liquid xenon photon detector.

Published
2010

34. Combined readout of a triple-GEM detector

Author

V. C. Antochi, Sandro Tomassini, Davide Pinci, G. Cavoto, E. Di Marco, C. Voena, F. Renga, E. Baracchini, M. Marafini, and Giovanni Mazzitelli

Subjects
Photomultiplier, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Particle tracking detectors (Gaseous detectors), Time projection chambers, FOS: Physical sciences, 01 natural sciences, Noise (electronics), Particle detector, dE/dx detectors, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, 0103 physical sciences, Waveform, 010306 general physics, Instrumentation, Mathematical Physics, Physics, 010308 nuclear & particles physics, business.industry, Resolution (electron density), Detector, Instrumentation and Detectors (physics.ins-det), CMOS, business, Energy (signal processing)
Abstract

Optical readout of GEM based devices by means of high granularity and low noise CMOS sensors allows to obtain very interesting tracking performance. Space resolution of the order of tens of $\mu$m were measured on the GEM plane along with an energy resolution of 20%$\div$30%. The main limitation of CMOS sensors is represented by their poor information about time structure of the event. In this paper, the use of a concurrent light readout by means of a suitable photomultiplier and the acquisition of the electric signal induced on the GEM electrode are exploited to provide the necessary timing informations. The analysis of the PMT waveform allows a 3D reconstruction of each single clusters with a resolution on z of 100 $\mu$m. Moreover, from the PMT signals it is possible to obtain a fast reconstruction of the energy released within the detector with a resolution of the order of 25% even in the tens of keV range useful, for example, for triggering purpose., Comment: 8 pages, 8 figures

Published
2018

35. The MEG detector for μ +→e+ γ decay search

Author

F. Renga, C Topchyan, Angela Papa, A. Graziosi, Yasuhiro Nishimura, Donato Nicolo, Bi Khazin, Hajime Nishiguchi, Am Baldini, M. Rossella, N. P. Kravchuk, E. Ripiccini, G. M. A. Lim, Y. Hisamatsu, S. Galeotti, N. Curalli, Malte Hildebrandt, Luca Galli, A.S. Popov, D. Kaneko, K. Ozone, D. Mzavia, M. De Gerone, Roberto Di Nardo, C. Cerri, M. Corbo, F. Tenchini, G. Piredda, S. Yamada, Giovanni Signorelli, M. Schneebeli, H. Natori, C. Bemporad, S. Yamamoto, A. S. Korenchenko, Flavio Gatti, L. Del Frate, Ryu Sawada, Pw Cattaneo, D. Zanello, R. Valle, Satoshi Mihara, T. Iwamoto, W. R. Molzon, M. Panareo, K. Fratini, Pr Kettle, E Baracchini, Fabrizio Cei, F.V. Ignatov, X. Bai, Marco Grassi, S. Doke, C. Voena, F. Morsani, F. Raffaelli, Katsuyu Kasami, R. Pazzi, Wataru Ootani, Yuki Fujii, G. Gallucci, Satoru Yamashita, F Xiao, G. Cavoto, Gianluigi Boca, A. Maki, A. de Bari, Tomiyoshi Haruyama, Stefan Ritt, Yv Yudin, J. Adam, O. Kiselev, F. Sergiampietri, D.N. Grigoriev, S. Suzuki, Takehiko Mori, Yusuke Uchiyama, S. Dussoni, B Golden, J. Egger, J., Adam, X., Bai, A. M., Baldini, E., Baracchini, C., Bemporad, G., Boca, P. W., Cattaneo, G., Cavoto, F., Cei, C., Cerri, M., Corbo, N., Curalli, A., De Bari, M., De Gerone, L., Del Frate, S., Doke, S., Dussoni, J., Egger, K., Fratini, Y., Fujii, L., Galli, S., Galeotti, G., Gallucci, F., Gatti, B., Golden, M., Grassi, A., Graziosi, D. N., Grigoriev, T., Haruyama, M., Hildebrandt, Y., Hisamatsu, F., Ignatov, T., Iwamoto, D., Kaneko, K., Kasami, P. R., Kettle, B. I., Khazin, O., Kiselev, A., Korenchenko, N., Kravchuk, G., Lim, A., Maki, S., Mihara, W., Molzon, T., Mori, F., Morsani, D., Mzavia, R., Nardò, H., Natori, D., Nicolò, H., Nishiguchi, Y., Nishimura, W., Ootani, K., Ozone, Panareo, Marco, A., Papa, R., Pazzi, G., Piredda, A., Popov, F., Raffaelli, F., Renga, E., Ripiccini, S., Ritt, M., Rossella, R., Sawada, M., Schneebeli, F., Sergiampietri, G., Signorelli, S., Suzuki, F., Tenchini, C., Topchyan, Y., Uchiyama, R., Valle, C., Voena, F., Xiao, S., Yamada, S., Yamamoto, S., Yamashita, Yudin, Y. u. V., and D., Zanello

Subjects
Physics, Antiparticle, Muon, Spectrometer, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Photon energy, Charged Lepton Flavor Violation, Particle detector, Lepton, Nuclear physics, Particle decay, Positron, Physics::Accelerator Physics, High Energy Physics::Experiment, Engineering (miscellaneous)
Abstract

The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 to search for the decay μ +→e+ γ by using one of the most intense continuous μ + beams in the world. This paper presents the MEG components: the positron spectrometer, including a thin target, a superconducting magnet, a set of drift chambers for measuring the muon decay vertex and the positron momentum, a timing counter for measuring the positron time, and a liquid xenon detector for measuring the photon energy, position and time. The trigger system, the read-out electronics and the data acquisition system are also presented in detail. The paper is completed with a description of the equipment and techniques developed for the calibration in time and energy and the simulation of the whole apparatus., The European Physical Journal C, 73 (4), ISSN:1434-6044, ISSN:1434-6052

Published
2013

36. Erratum: Measurement of the absolute branching fractions forDs−→ℓ−ν¯ℓand extraction of the decay constantfDs[Phys. Rev. D82, 091103(R) (2010)]

Author

H. L. Lynch, Colin Jessop, D. M. Strom, V. E. Blinov, A. Adametz, T. M. Karbach, Peter S. Kim, J. E. Brau, V. Prasad, Roberto Calabrese, R. Prepost, O. Hamon, J. Schwiening, Benjamin Henry Hooberman, J. Ocariz, Christopher West, Yu I. Skovpen, F. Simonetto, R. H. Schindler, T. S. Mattison, P. Taras, E. P. Solodov, M. Simard, D. A. Roberts, G. Grosdidier, J. J. Walsh, J. W. Gary, D. W. G. S. Leith, V. B. Golubev, Alessandro Rossi, Abner Soffer, B. Lindquist, C. Hearty, D. J. Summers, M. Tibbetts, M. Bomben, R. J. Sobie, R. Kroeger, L. Vitale, C. Hast, D. J. Lange, G. Piredda, M. Morii, F. Martinez-Vidal, Dominik Müller, B. C. Wray, Ch Yèche, A. T. Watson, X. C. Lou, L. A. Corwin, T. J. Gershon, A. Hafner, D. Su, G. Calderini, H. W. Wulsin, D. N. Brown, J. M. LoSecco, M. Gaspero, M. Weaver, S. Stracka, U. Mallik, B. Pan, Elisa Guido, J. L. Ritchie, Maria Roberta Monge, N. B. Sinev, M. Piccolo, M. T. Allen, J. P. Coleman, G. Lynch, A. Jawahery, I. M. Peruzzi, Achille Stocchi, R. Baldini-Ferroli, G. D. Lafferty, A. Oyanguren, D. Derkach, W. F. Wang, G. Rizzo, M. Rama, P. J. Clark, M. L. Kocian, D. Kirkby, E. Paoloni, G. Cibinetto, S. Paramesvaran, G. Vasseur, G. Batignani, F. U. Bernlochner, G. J. King, C. Touramanis, Y. Pan, C. A. Heusch, D. B. MacFarlane, T. S. Miyashita, J. A. McKenna, M. Bondioli, M. Munerato, Heiko Lacker, E. Feltresi, S. I. Serednyakov, F. Bianchi, R. Andreassen, D. Bettoni, M. J. Lewczuk, M. Mandelkern, R. Bartoldus, Denis Bernard, R. Cenci, A. E. Rubin, Mario Pelliccioni, B. Bhuyan, C. O. Vuosalo, A. P. Onuchin, E. Ben-Haim, Aidan Randle-Conde, G. Onorato, J. P. Morris, B. N. Ratcliff, A. C. Wren, D. Dujmic, A. Zallo, B. G. Fulsom, Elisa Manoni, D. A. Milanes, J. Merkel, C. M. Hawkes, M. Carpinelli, D. Lindemann, I. Bingham, S. Playfer, P. C. Bloom, E. Baracchini, D. H. Wright, C. P. O'Grady, J. F. Benitez, C. Patrignani, B. T. Meadows, G. Raven, Douglas Wright, Shu Li, V. Tisserand, A. V. Telnov, J. Strube, M. D. Sokoloff, R. Schwierz, M. Fritsch, T. Lueck, Gabriele Simi, F. Renga, I. L. Osipenkov, Dmytro Kovalskyi, P. R. Burchat, J. P. Lees, D. A. Doll, M. T. Graham, M. Lo Vetere, L. Piemontese, G. Castelli, A. A. Salnikov, J. Chauveau, C. L. Davis, A. P. Wagner, K. E. Alwyn, S. Bettarini, A. Petzold, C. A. West, E. Gabathuler, W. R. Innes, F. C. Porter, Crisostomo Sciacca, D. Aston, D. J. Asgeirsson, R. Gamet, Eleonora Luppi, B. Franek, W. Park, S. Pacetti, R. Cowan, A. Lazzaro, J. Anderson, M. J. Kobel, T. Schalk, M. Rotondo, A. Palano, M. Pappagallo, M. Zito, A. Volk, C. H. Chen, R. Eckmann, K. T. Flood, M. K. Sullivan, S. B. Zain, Giulia Casarosa, R. Frey, V. Santoro, Sw. Banerjee, M. A. Mazzoni, G. Wormser, S. M. Spanier, R. F. Schwitters, F. Liu, G. De Nardo, L. Wang, P. Biassoni, P. Sonnek, W. T. Meyer, K. J. Knoepfel, J. M. Thompson, Bruce Schumm, H. B. Crawley, M. H. Kelsey, R. Sacco, H. L. Snoek, E. O. Olaiya, J. Kroseberg, C. Lu, M. A. Saeed, G. Cavoto, G. P. Dubois-Felsmann, J. E. Watson, M. Schram, F. Palombo, I. M. Nugent, G. M. Vitug, J. Garra Tico, G. Jackson, J. Prendki, G. R. Bonneaud, James D. Olsen, E. Grauges, J. Dorfan, J. R. Fry, D. E. Hutchcroft, C. Dallapiccola, T. Leddig, Enrico Robutti, P. Ongmongkolkul, P. Patteri, J. Firmino da Costa, N. Gagliardi, E. I. Rosenberg, F. Anulli, J. A. Kolb, L. T. Kerth, Corrado Angelini, Stephen Sekula, D. Lopes Pegna, Mario Giorgi, M. Ebert, H. R. Band, W. S. Lockman, Alessandro Gaz, E. Prencipe, C. H. Cheng, A. J.S. Smith, S. H. Robertson, L. Dong, H. Marsiske, A. Khan, D. S. Bailey, V. P. Druzhinin, M. Battaglia, I. Ofte, T. Schroeder, R. Ayad, X. Nguyen, T. E. Latham, C. Bozzi, S. Emery, Sridhara Dasu, M. Verderi, Ph Leruste, S. Sitt, Herbert Koch, S. Curry, C. J. Schilling, M. Morandin, K. Honscheid, M. Zhao, C. A. Chavez, N. Arnaud, M. R. Convery, A. Perez, Andrei Gritsan, A. M. Lutz, R. de Sangro, N. Lopez-March, A. K. Yarritu, S. L. Wu, Shouheng Sun, R. J. Barlow, W. J. Wisniewski, B. Spaan, K. Yu Todyshev, Claudio Campagnari, M. Davier, X. R. Chen, H. Briand, U. Uwer, V. Ziegler, Maurizio Biasini, W. Gradl, S. Prell, W. Dunwoodie, P. Del Amo Sanchez, S. Passaggio, M. Posocco, W. H. Toki, A. N. Yushkov, L. Lanceri, C. C. Young, F. Forti, R. Stroili, E. C. Martin, A. G. Denig, V. Lombardo, James H Cochran, V. Poireau, H. A. Neal, R. C. Field, A. M. Eisner, D. Monorchio, Marie Helene Schune, Owen Rosser Long, N. L. Blount, G. Finocchiaro, V. Luth, A. Seiden, E. Salvati, L. O. Winstrom, M. S. Alam, P. D. Dauncey, G. Hamel de Monchenault, T. Hartmann, A. Snyder, Mirco Andreotti, F. F. Wilson, A. R. Buzykaev, J. A. Ernst, M. V. Purohit, J. Albert, M. Wittgen, A. Lusiani, L. Sun, K. Wacker, G. Sciolla, Alberto Cervelli, Adrian John Bevan, R. Kowalewski, Yu. G. Kolomensky, M. L. Perl, Z. J. Guo, A. Y. Rakitin, Joseph Izen, A. Roodman, S. Nelson, James R. Wilson, E. Fioravanti, T. Pulliam, Roland Waldi, F. Ferroni, Paul Fraser Harrison, P. M. Patel, Stephen Robert Wagner, J. M. Tuggle, P. Lund, R. Contri, M. Sigamani, K. R. Schubert, A. Calcaterra, H. Atmacan, M. Nicolaci, L. M. Cremaldi, D. P. Stoker, P. Franchini, T. M. Hong, Matteo Negrini, A. M. Ruland, D. G. Hitlin, M. S. Dubrovin, G. Eigen, A. J. Martinez, Nicola Neri, B. Echenard, H. Jasper, Olga Igonkina, A. M. Gabareen, W. T. Ford, Tim Adye, R. D. Kass, G. Mancinelli, E. Torrence, C. L. Lee, A. J. Edwards, M. Bellis, Hyun-Chul Kim, H. Schröder, S. Luitz, K. Suzuki, R. M. White, M. Franco Sevilla, C. Cartaro, Philippe Grenier, F. Di Lodovico, D. J. Payne, P. Roudeau, U. Nauenberg, Prafulla Kumar Behera, L. Li Gioi, J. Va’vra, Martino Margoni, Silvano Tosi, Kenji Hamano, R. Rahmat, A. Petrella, J. Serrano, S. Ahmed, D. Gamba, Maria A. Nagel, B. Malaescu, T. Tanabe, N. Guttman, A. Cecchi, B. Stugu, G. Marchiori, H. H. F. Choi, R. Faccini, F. Ferrarotto, A. J. Lankford, F. Le Diberder, Maurizio Martinelli, J. D. Richman, V. Sordini, J. M. Roney, D. J. Bard, J. Marks, G. A. Cowan, J. G. Smith, E. M.T. Puccio, and R. Godang

Subjects
Nuclear physics, Gravitation, Physics, Nuclear and High Energy Physics, Quantum mechanics, Exponential decay, Branching (polymer chemistry), Cosmology, Ion
Published
2015

37. Electromagnetic corrections to non-leptonic two-body B and D decays

Author

Gino Isidori and E. Baracchini

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Scalar (mathematics), FOS: Physical sciences, Scalar boson, Photon energy, Pseudoscalar meson, Pseudoscalar, Nuclear physics, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Pion, B meson, Scalar meson
Abstract

We present analytic expressions to evaluate at O(alpha) the effects of soft-photon emission, and the related virtual corrections, in non-leptonic decays of the type B,D -> P1 P2, where P1 and P2 are scalar or pseudoscalar particles. The phenomenological implications of these results are briefly discussed. For B decays into charged pions the effects of soft-photon emission are quite large: the corrections to the rates can easily exceed the 5% level if tight cuts on the photon energy are applied., 8 pages, 2 figures

Published
2006

38. Observation and study of the baryonic B-meson decays B --> D(*) p anti-p (pi) (pi)

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, M. Battaglia, D. Brown, B. Hooberman, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, T. Tanabe, C. Hawkes, A. Watson, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, A. Randle Conde, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, J. Flanigan, T. Hong, D. Kovalskyi, J. Richman, C. West, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, G. Mancinelli, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, T. Karbach, J. Merkel, A. Petzold, B. Spaan, K. Wacker, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, S. Tosi, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Adametz, J. Marks, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, L. Dong, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, R. Gamet, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, D. Monorchio, G. Onorato, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, J. Morris, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, B. Franek, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Zito, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, S. Li, B. Lindquist, S. Luitz, V. Luth, H. Lynch, D. MacFarlane, H. Marsiske, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, S. Sekula, M. Bellis, P. Burchat, A. Edwards, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, M. Bomben, L. Lanceri, L. Vitale, N. Lopez March, F. Martinez Vidal, D. Milanes, A. Oyanguren, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, DE NARDO, GUGLIELMO, SCIACCA, CRISOSTOMO, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, M., Battaglia, D., Brown, B., Hooberman, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, T., Tanabe, C., Hawke, A., Watson, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, A., Randle Conde, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, J., Flanigan, T., Hong, D., Kovalskyi, J., Richman, C., West, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, G., Mancinelli, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, T., Karbach, J., Merkel, A., Petzold, B., Spaan, K., Wacker, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, S., Tosi, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Adametz, J., Mark, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, L., Dong, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, R., Gamet, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, DE NARDO, Guglielmo, D., Monorchio, G., Onorato, Sciacca, Crisostomo, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, J., Morri, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, B., Franek, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Zito, M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, S., Li, B., Lindquist, S., Luitz, V., Luth, H., Lynch, D., Macfarlane, H., Marsiske, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, S., Sekula, M., Belli, P., Burchat, A., Edward, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, M., Bomben, L., Lanceri, L., Vitale, N., Lopez March, F., Martinez Vidal, D., Milane, A., Oyanguren, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Published
2012

40. Searches for the baryon- and lepton-number violating decays B0 --> Lambda_c+ l-, B- --> Lambda l-, and B- --> anti-Lambda l

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, D. Milanes, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, D. Brown, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, E. Kravchenko, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, T. Hong, D. Kovalskyi, J. Richman, C. West, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, A. Petzold, B. Spaan, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, I. Garzia, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Edwards, A. Adametz, J. Marks, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, D. Monorchio, G. Onorato, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, M. Bomben, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, C. Buenger, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, P. Lewis, S. Li, B. Lindquist, S. Luitz, V. Luth, H. Lynch, D. MacFarlane, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, A. Randle Conde, S. Sekula, M. Bellis, P. Burchat, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, L. Lanceri, L. Vitale, N. Lopez March, F. Martinez Vidal, A. Oyanguren, H. Ahmed, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, C. Lindsay, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, DE NARDO, GUGLIELMO, SCIACCA, CRISOSTOMO, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, D., Milane, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, D., Brown, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, E., Kravchenko, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, T., Hong, D., Kovalskyi, J., Richman, C., West, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, A., Petzold, B., Spaan, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, I., Garzia, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Edward, A., Adametz, J., Mark, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, DE NARDO, Guglielmo, D., Monorchio, G., Onorato, Sciacca, Crisostomo, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, M., Bomben, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, C., Buenger, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, P., Lewi, S., Li, B., Lindquist, S., Luitz, V., Luth, H., Lynch, D., Macfarlane, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, A., Randle Conde, S., Sekula, M., Belli, P., Burchat, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, L., Lanceri, L., Vitale, N., Lopez March, F., Martinez Vidal, A., Oyanguren, H., Ahmed, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, C., Lindsay, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Published
2011

41. Search for CP violation in the decay D+ --> K_S pi+

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, D. Milanes, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, D. Brown, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, E. Kravchenko, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, T. Hong, D. Kovalskyi, J. Richman, C. West, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, A. Petzold, B. Spaan, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, I. Garzia, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Edwards, A. Adametz, J. Marks, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, D. Monorchio, G. Onorato, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, A. Pompili, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, M. Bomben, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, C. Buenger, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, P. Lewis, S. Li, B. Lindquist, S. Luitz, V. Luth, H. Lynch, D. MacFarlane, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, A. Randle Conde, S. Sekula, M. Bellis, P. Burchat, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, L. Lanceri, L. Vitale, N. Lopez March, F. Martinez Vidal, A. Oyanguren, H. Ahmed, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, C. Lindsay, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, DE NARDO, GUGLIELMO, SCIACCA, CRISOSTOMO, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, D., Milane, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, D., Brown, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, E., Kravchenko, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, T., Hong, D., Kovalskyi, J., Richman, C., West, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, A., Petzold, B., Spaan, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, I., Garzia, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Edward, A., Adametz, J., Mark, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, DE NARDO, Guglielmo, D., Monorchio, G., Onorato, Sciacca, Crisostomo, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, A., Pompili, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, M., Bomben, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, C., Buenger, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, P., Lewi, S., Li, B., Lindquist, S., Luitz, V., Luth, H., Lynch, D., Macfarlane, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, A., Randle Conde, S., Sekula, M., Belli, P., Burchat, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, L., Lanceri, L., Vitale, N., Lopez March, F., Martinez Vidal, A., Oyanguren, H., Ahmed, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, C., Lindsay, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Published
2011

42. Observation of η_{c}(1S) and η_{c}(2S) decays to K^{+}K^{-}π^{+}π^{-}π^{0} in two-photon interactions

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, M. Battaglia, D. Brown, B. Hooberman, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, T. Tanabe, C. Hawkes, A. Watson, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, A. Randle Conde, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, T. Hong, D. Kovalskyi, J. Richman, C. West, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, G. Mancinelli, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, T. Karbach, J. Merkel, A. Petzold, B. Spaan, K. Wacker, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, S. Tosi, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Adametz, J. Marks, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, L. Dong, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, R. Gamet, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, G. De Nardo, D. Monorchio, G. Onorato, C. Sciacca, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, J. Morris, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, B. Franek, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Zito, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, S. Li, B. Lindquist, S. Luitz, V. Luth, H. Lynch, D. MacFarlane, H. Marsiske, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, S. Sekula, M. Bellis, P. Burchat, A. Edwards, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, M. Bomben, N. Lopez March, F. Martinez Vidal, D. Milanes, A. Oyanguren, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, LANCERI, LIVIO, VITALE, LORENZO, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, M., Battaglia, D., Brown, B., Hooberman, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, T., Tanabe, C., Hawke, A., Watson, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, A., Randle Conde, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, T., Hong, D., Kovalskyi, J., Richman, C., West, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, G., Mancinelli, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, T., Karbach, J., Merkel, A., Petzold, B., Spaan, K., Wacker, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, S., Tosi, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Adametz, J., Mark, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, L., Dong, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, R., Gamet, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, G., De Nardo, D., Monorchio, G., Onorato, C., Sciacca, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, J., Morri, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, B., Franek, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Zito, M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, S., Li, B., Lindquist, S., Luitz, V., Luth, H., Lynch, D., Macfarlane, H., Marsiske, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, S., Sekula, M., Belli, P., Burchat, A., Edward, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, M., Bomben, Lanceri, Livio, Vitale, Lorenzo, N., Lopez March, F., Martinez Vidal, D., Milane, A., Oyanguren, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Subjects
BaBar detector at SLAC
Abstract

We study the processes γγ→KS0K±π∓ and γγ→K+K-π+π-π0 using a data sample of 519.2fb-1 recorded by the BABAR detector at the PEP-II asymmetric-energy e+e- collider at center-of-mass energies near the Υ(nS) (n=2, 3, 4) resonances. We observe the ηc(1S), χc0(1P) and ηc(2S) resonances produced in two-photon interactions and decaying to K+K-π+π-π0, with significances of 18.1, 5.4 and 5.3 standard deviations (including systematic errors), respectively, and report 4.0σ evidence of the χc2(1P) decay to this final state. We measure the ηc(2S) mass and width in KS0K±π∓ decays, and obtain the values m(ηc(2S))=3638.5±1.5±0.8 MeV/c2 and Γ(ηc(2S))=13.4±4.6±3.2 MeV, where the first uncertainty is statistical and the second is systematic. We measure the two-photon width times branching fraction for the reported resonance signals, and search for the χc2(2P) resonance, but no significant signal is observed.

Published
2011

43. Calibration and monitoring of the MEG experiment by a proton beam from a Cockcroft-Walton accelerator

Author

J. Adam, X. Bai, A. Baldini, E. Baracchini, A. Barchiesi, C. Bemporad, G. Boca, P. W. Cattaneo, G. Cavoto, G. Cecchet, F. Cei, C. Cerri, A. De Bari, M. De Gerone, T. Doke, S. Dussoni, J. Egger, L. Galli, G. Gallucci, F. Gatti, B. Golden, M. Grassi, D. N. Grigoriev, T. Haruyama, M. Hildebrandt, Y. Hisamatsu, F. Ignatov, T. Iwamoto, D. Kaneko, P. R. Kettle, B. I. Khazin, O. Kiselev, A. Korenchenko, N. Kravchuk, A. Maki, S. Mihara, W. Molzon, T. Mori, D. Mzavia, H. Natori, R. Nardò, D. Nicolò, H. Nishiguchi, Y. Nishimura, W. Ootani, A. Papa, R. Pazzi, G. Piredda, A. Popov, F. Renga, S. Ritt, M. Rossella, R. Sawada, M. Schneebeli, F. Sergiampietri, G. Signorelli, S. Suzuki, C. Topchyan, V. Tumakov, Y. Uchiyama, R. Valle, C. Voena, F. Xiao, S. Yamada, A. Yamamoto, S. Yamashita, Y.u. V. Yudin, D. Zanello, PANAREO, Marco, J., Adam, X., Bai, A., Baldini, E., Baracchini, A., Barchiesi, C., Bemporad, G., Boca, P. W., Cattaneo, G., Cavoto, G., Cecchet, F., Cei, C., Cerri, A., De Bari, M., De Gerone, T., Doke, S., Dussoni, J., Egger, L., Galli, G., Gallucci, F., Gatti, B., Golden, M., Grassi, D. N., Grigoriev, T., Haruyama, M., Hildebrandt, Y., Hisamatsu, F., Ignatov, T., Iwamoto, D., Kaneko, P. R., Kettle, B. I., Khazin, O., Kiselev, A., Korenchenko, N., Kravchuk, A., Maki, S., Mihara, W., Molzon, T., Mori, D., Mzavia, H., Natori, R., Nardò, D., Nicolò, H., Nishiguchi, Y., Nishimura, W., Ootani, Panareo, Marco, A., Papa, R., Pazzi, G., Piredda, A., Popov, F., Renga, S., Ritt, M., Rossella, R., Sawada, M., Schneebeli, F., Sergiampietri, G., Signorelli, S., Suzuki, C., Topchyan, V., Tumakov, Y., Uchiyama, R., Valle, C., Voena, F., Xiao, S., Yamada, A., Yamamoto, S., Yamashita, Yudin, Y. u. V., and D., Zanello

Subjects
Calibration, Beam monitoring, γ-rays, Cockcroft–Walton accelerator
Abstract

The MEG experiment at PSI searches for the decay μ→eγ at a level of ≈10^−13 on the branching ratio BR(μ→eγ/μ→tot), well beyond the present experimental limit (BR≤1.2×10^−11) and is sensitive to the predictions of SUSY-GUT theories. To reach this goal the experiment uses one of the most intense continuous surface muon beams available (≈10^8μ/s) and relies on advanced technology (LXe calorimetry, a gradient-field superconducting spectrometer as well as flexible and powerful trigger and acquisition systems). In order to maintain the highest possible energy, time and spatial resolutions for such detector, frequent calibration and monitoring, using a Cockcroft–Walton proton accelerator, are required. The proton beam is brought to the centre of MEG by a special bellows insertion system and travels in a direction opposite to the one of the normal μ-beam. Protons interact with a lithium tetraborate (Li2B4O7) nuclear target and produce one γ (17.6 MeV) from the reaction 3-7 Li(p, γ)8-4 or two coincident γs (11.67 and 4.4 MeV) from the reaction 11-5 B(p, γ)12-6 C*. The 17.6 MeV γ is used for calibrating and monitoring the LXe calorimeter (σEγ/Eγ=3.85±0.15% at 17.6 MeV) while the coincident 11.67 and 4.4 MeV γs are used to measure the relative timing of the calorimeter and the spectrometer timing counters (σ_delta_t=0.450±0.015ns).

Published
2011

44. New Limit on the Lepton-Flavor-Violating Decay μ→eγ

Author

J. Adam, X. Bai, A. M. Baldini, E. Baracchini, C. Bemporad, G. Boca, P. W. Cattaneo, G. Cavoto, F. Cei, C. Cerri, A. de Bari, M. De Gerone, T. Doke, S. Dussoni, J. Egger, K. Fratini, Y. Fujii, L. Galli, G. Gallucci, F. Gatti, B. Golden, M. Grassi, D. N. Grigoriev, T. Haruyama, M. Hildebrandt, Y. Hisamatsu, F. Ignatov, T. Iwamoto, P. R. Kettle, B. I. Khazin, O. Kiselev, A. Korenchenko, N. Kravchuk, A. Maki, S. Mihara, W. Molzon, T. Mori, D. Mzavia, H. Natori, D. Nicolò, H. Nishiguchi, Y. Nishimura, W. Ootani, A. Papa, R. Pazzi, G. Piredda, A. Popov, F. Renga, S. Ritt, M. Rossella, R. Sawada, F. Sergiampietri, G. Signorelli, S. Suzuki, F. Tenchini, C. Topchyan, Y. Uchiyama, R. Valle, C. Voena, F. Xiao, S. Yamada, A. Yamamoto, S. Yamashita, Y.u. V. Yudin, D. Zanello, PANAREO, Marco, J., Adam, X., Bai, A. M., Baldini, E., Baracchini, C., Bemporad, G., Boca, P. W., Cattaneo, G., Cavoto, F., Cei, C., Cerri, A., de Bari, M., De Gerone, T., Doke, S., Dussoni, J., Egger, K., Fratini, Y., Fujii, L., Galli, G., Gallucci, F., Gatti, B., Golden, M., Grassi, D. N., Grigoriev, T., Haruyama, M., Hildebrandt, Y., Hisamatsu, F., Ignatov, T., Iwamoto, P. R., Kettle, B. I., Khazin, O., Kiselev, A., Korenchenko, N., Kravchuk, A., Maki, S., Mihara, W., Molzon, T., Mori, D., Mzavia, H., Natori, D., Nicolò, H., Nishiguchi, Y., Nishimura, W., Ootani, Panareo, Marco, A., Papa, R., Pazzi, G., Piredda, A., Popov, F., Renga, S., Ritt, M., Rossella, R., Sawada, F., Sergiampietri, G., Signorelli, S., Suzuki, F., Tenchini, C., Topchyan, Y., Uchiyama, R., Valle, C., Voena, F., Xiao, S., Yamada, A., Yamamoto, S., Yamashita, Yudin, Y. u. V., and D., Zanello

Subjects
lepton-flavor-violating decay
Abstract

We present a new result based on an analysis of the data collected by the MEG detector at the Paul Scherrer Institut in 2009 and 2010, in search of the lepton-flavor-violating decay μ→eγ. The likelihood analysis of the combined data sample, which corresponds to a total of 1.8×10^14 muon decays, gives a 90% C.L. upper limit of 2.4×10^-12 on the branching ratio of the μ→eγ decay, constituting the most stringent limit on the existence of this decay to date.

Published
2011

45. Dalitz plot analysis of D_{s}^{+}→K^{+}K^{-}π^{+}

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, D. Milanes, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, D. Brown, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, E. Kravchenko, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, T. Hong, D. Kovalskyi, J. Richman, C. West, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, G. Mancinelli, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, T. Karbach, A. Petzold, B. Spaan, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, I. Garzia, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, S. Tosi, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Edwards, A. Adametz, J. Marks, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, L. Dong, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, R. Gamet, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, G. De Nardo, D. Monorchio, G. Onorato, C. Sciacca, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, J. Morris, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, B. Franek, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Zito, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, S. Li, B. Lindquist, S. Luitz, V. Luth, H. Lynch, D. MacFarlane, H. Marsiske, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, A. Randle Conde, S. Sekula, M. Bellis, P. Burchat, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, M. Bomben, N. Lopez March, F. Martinez Vidal, A. Oyanguren, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, C. Lindsay, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, M. Pennington, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, LANCERI, LIVIO, VITALE, LORENZO, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, D., Milane, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, D., Brown, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, E., Kravchenko, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, T., Hong, D., Kovalskyi, J., Richman, C., West, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, G., Mancinelli, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, T., Karbach, A., Petzold, B., Spaan, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, I., Garzia, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, S., Tosi, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Edward, A., Adametz, J., Mark, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, L., Dong, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, R., Gamet, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, G., De Nardo, D., Monorchio, G., Onorato, C., Sciacca, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, J., Morri, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, B., Franek, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Zito, M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, S., Li, B., Lindquist, S., Luitz, V., Luth, H., Lynch, D., Macfarlane, H., Marsiske, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, A., Randle Conde, S., Sekula, M., Belli, P., Burchat, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, M., Bomben, Lanceri, Livio, Vitale, Lorenzo, N., Lopez March, F., Martinez Vidal, A., Oyanguren, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, C., Lindsay, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, M., Pennington, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Subjects
BaBar detector at SLAC
Abstract

We perform a Dalitz plot analysis of about 100 000 Ds+ decays to K+K-π+ and measure the complex amplitudes of the intermediate resonances which contribute to this decay mode. We also measure the relative branching fractions of Ds+→K+K+π- and Ds+→K+K+K-. For this analysis we use a 384 fb-1 data sample, recorded by the BABAR detector at the PEP-II asymmetric-energy e+e- collider running at center-of-mass energies near 10.58 GeV.

Published
2011

46. Observation of the Decay B- --> D_s*+ K- l- nu_l

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, M. Battaglia, D. Brown, B. Hooberman, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, T. Tanabe, C. Hawkes, A. Watson, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, A. Randle Conde, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, T. Hong, D. Kovalskyi, J. Richman, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, G. Mancinelli, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, T. Karbach, J. Merkel, A. Petzold, B. Spaan, K. Wacker, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, S. Tosi, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Adametz, J. Marks, S. Schenk, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, L. Dong, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, Y. Gao, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, R. Gamet, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, T. West, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, P. Fisher, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, D. Monorchio, G. Onorato, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, J. Morris, A. Rahimi, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, B. Franek, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Zito, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, S. Li, B. Lindquist, S. Luitz, V. Luth, H. Lynch, D. MacFarlane, H. Marsiske, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, C. West, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, S. Sekula, M. Bellis, P. Burchat, A. Edwards, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, M. Bomben, L. Lanceri, L. Vitale, N. Lopez March, F. Martinez Vidal, D. Milanes, A. Oyanguren, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, DE NARDO, GUGLIELMO, SCIACCA, CRISOSTOMO, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, M., Battaglia, D., Brown, B., Hooberman, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, T., Tanabe, C., Hawke, A., Watson, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, A., Randle Conde, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, T., Hong, D., Kovalskyi, J., Richman, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, G., Mancinelli, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, T., Karbach, J., Merkel, A., Petzold, B., Spaan, K., Wacker, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, S., Tosi, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Adametz, J., Mark, S., Schenk, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, L., Dong, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, Y., Gao, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, R., Gamet, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, T., West, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, P., Fisher, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, DE NARDO, Guglielmo, D., Monorchio, G., Onorato, Sciacca, Crisostomo, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, J., Morri, A., Rahimi, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, B., Franek, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Zito, M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, S., Li, B., Lindquist, S., Luitz, V., Luth, H., Lynch, D., Macfarlane, H., Marsiske, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, C., West, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, S., Sekula, M., Belli, P., Burchat, A., Edward, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, M., Bomben, L., Lanceri, L., Vitale, N., Lopez March, F., Martinez Vidal, D., Milane, A., Oyanguren, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Published
2011

47. Measurement of the B^{0}→π^{-}ℓ^{+}ν and B^{+}→η^{(′)}ℓ^{+}ν branching fractions, the B^{0}→π^{-}ℓ^{+}ν and B^{+}→ηℓ^{+}ν form-factor shapes, and determination of |V_{ub}

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, D. Milanes, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, D. Brown, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, A. Randle Conde, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, E. Kravchenko, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, T. Hong, D. Kovalskyi, J. Richman, C. West, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, G. Mancinelli, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, T. Karbach, A. Petzold, B. Spaan, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, S. Tosi, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Adametz, J. Marks, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, L. Dong, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, R. Gamet, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, G. De Nardo, D. Monorchio, G. Onorato, C. Sciacca, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, J. Morris, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, B. Franek, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Zito, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, S. Li, B. Lindquist, S. Luitz, H. Lynch, D. MacFarlane, H. Marsiske, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, S. Sekula, M. Bellis, P. Burchat, A. Edwards, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, M. Bomben, N. Lopez March, F. Martinez Vidal, A. Oyanguren, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, C. Lindsay, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, LANCERI, LIVIO, VITALE, LORENZO, Sanchez, P, Lees, J, Poireau, V, Prencipe, E, Tisserand, V, Tico, J, Grauges, E, Martinelli, M, Milanes, D, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Brown, D, Kerth, L, Kolomensky, Y, Lynch, G, Osipenkov, I, Koch, H, Schroeder, T, Asgeirsson, D, Hearty, C, Mattison, T, Mckenna, J, Khan, A, Randle Conde, A, Blinov, V, Buzykaev, A, Druzhinin, V, Golubev, V, Kravchenko, E, Onuchin, A, Serednyakov, S, Skovpen, Y, Solodov, E, Todyshev, K, Yushkov, A, Bondioli, M, Curry, S, Kirkby, D, Lankford, A, Mandelkern, M, Martin, E, Stoker, D, Atmacan, H, Gary, J, Liu, F, Long, O, Vitug, G, Campagnari, C, Hong, T, Kovalskyi, D, Richman, J, West, C, Eisner, A, Heusch, C, Kroseberg, J, Lockman, W, Martinez, A, Schalk, T, Schumm, B, Seiden, A, Winstrom, L, Cheng, C, Doll, D, Echenard, B, Hitlin, D, Ongmongkolkul, P, Porter, F, Rakitin, A, Andreassen, R, Dubrovin, M, Mancinelli, G, Meadows, B, Sokoloff, M, Bloom, P, Ford, W, Gaz, A, Nagel, M, Nauenberg, U, Smith, J, Wagner, S, Ayad, R, Toki, W, Jasper, H, Karbach, T, Petzold, A, Spaan, B, Kobel, M, Schubert, K, Schwierz, R, Bernard, D, Verderi, M, Clark, P, Playfer, S, Watson, J, Andreotti, M, Bettoni, D, Bozzi, C, Calabrese, R, Cecchi, A, Cibinetto, G, Fioravanti, E, Franchini, P, Luppi, E, Munerato, M, Negrini, M, Petrella, A, Piemontese, L, Baldini Ferroli, R, Calcaterra, A, de Sangro, R, Finocchiaro, G, Nicolaci, M, Pacetti, S, Patteri, P, Peruzzi, I, Piccolo, M, Rama, M, Zallo, A, Contri, R, Guido, E, Lo Vetere, M, Monge, M, Passaggio, S, Patrignani, C, Robutti, E, Tosi, S, Bhuyan, B, Prasad, V, Lee, C, Morii, M, Adametz, A, Marks, J, Uwer, U, Bernlochner, F, Ebert, M, Lacker, H, Lueck, T, Volk, A, Dauncey, P, Tibbetts, M, Behera, P, Mallik, U, Chen, C, Cochran, J, Crawley, H, Dong, L, Meyer, W, Prell, S, Rosenberg, E, Rubin, A, Gritsan, A, Guo, Z, Arnaud, N, Davier, M, Derkach, D, da Costa, J, Grosdidier, G, Le Diberder, F, Lutz, A, Malaescu, B, Perez, A, Roudeau, P, Schune, M, Serrano, J, Sordini, V, Stocchi, A, Wang, L, Wormser, G, Lange, D, Wright, D, Bingham, I, Chavez, C, Coleman, J, Fry, J, Gabathuler, E, Gamet, R, Hutchcroft, D, Payne, D, Touramanis, C, Bevan, A, Di Lodovico, F, Sacco, R, Sigamani, M, Cowan, G, Paramesvaran, S, Wren, A, Davis, C, Denig, A, Fritsch, M, Gradl, W, Hafner, A, Alwyn, K, Bailey, D, Barlow, R, Jackson, G, Lafferty, G, Anderson, J, Cenci, R, Jawahery, A, Roberts, D, Simi, G, Tuggle, J, Dallapiccola, C, Salvati, E, Cowan, R, Dujmic, D, Sciolla, G, Zhao, M, Lindemann, D, Patel, P, Robertson, S, Schram, M, Biassoni, P, Lazzaro, A, Lombardo, V, Palombo, F, Stracka, S, Cremaldi, L, Godang, R, Kroeger, R, Sonnek, P, Summers, D, Nguyen, X, Simard, M, Taras, P, De Nardo, G, Monorchio, D, Onorato, G, Sciacca, C, Raven, G, Snoek, H, Jessop, C, Knoepfel, K, Losecco, J, Wang, W, Corwin, L, Honscheid, K, Kass, R, Morris, J, Blount, N, Brau, J, Frey, R, Igonkina, O, Kolb, J, Rahmat, R, Sinev, N, Strom, D, Strube, J, Torrence, E, Castelli, G, Feltresi, E, Gagliardi, N, Margoni, M, Morandin, M, Posocco, M, Rotondo, M, Simonetto, F, Stroili, R, Ben Haim, E, Bonneaud, G, Briand, H, Calderini, G, Chauveau, J, Hamon, O, Leruste, P, Marchiori, G, Ocariz, J, Prendki, J, Sitt, S, Biasini, M, Manoni, E, Rossi, A, Angelini, C, Batignani, G, Bettarini, S, Carpinelli, M, Casarosa, G, Cervelli, A, Forti, F, Giorgi, M, Lusiani, A, Neri, N, Paoloni, E, Rizzo, G, Walsh, J, Pegna, D, Lu, C, Olsen, J, Smith, A, Telnov, A, Anulli, F, Baracchini, E, Cavoto, G, Faccini, R, Ferrarotto, F, Ferroni, F, Gaspero, M, Gioi, L, Mazzoni, M, Piredda, G, Renga, F, Hartmann, T, Leddig, T, Schroder, H, Waldi, R, Adye, T, Franek, B, Olaiya, E, Wilson, F, Emery, S, de Monchenault, G, Vasseur, G, Yeche, C, Zito, M, Allen, M, Aston, D, Bard, D, Bartoldus, R, Benitez, J, Cartaro, C, Convery, M, Dorfan, J, Dubois Felsmann, G, Dunwoodie, W, Field, R, Sevilla, M, Fulsom, B, Gabareen, A, Graham, M, Grenier, P, Hast, C, Innes, W, Kelsey, M, Kim, H, Kim, P, Kocian, M, Leith, D, Li, S, Lindquist, B, Luitz, S, Lynch, H, Macfarlane, D, Marsiske, H, Muller, D, Neal, H, Nelson, S, O'Grady, C, Ofte, I, Perl, M, Pulliam, T, Ratcliff, B, Roodman, A, Salnikov, A, Santoro, V, Schindler, R, Schwiening, J, Snyder, A, Su, D, Sullivan, M, Sun, S, Suzuki, K, Thompson, J, Va'Vra, J, Wagner, A, Weaver, M, Wisniewski, W, Wittgen, M, Wulsin, H, Yarritu, A, Young, C, Ziegler, V, Chen, X, Park, W, Purohit, M, White, R, Wilson, J, Sekula, S, Bellis, M, Burchat, P, Edwards, A, Miyashita, T, Ahmed, S, Alam, M, Ernst, J, Pan, B, Saeed, M, Zain, S, Guttman, N, Soffer, A, Lund, P, Spanier, S, Eckmann, R, Ritchie, J, Ruland, A, Schilling, C, Schwitters, R, Wray, B, Izen, J, Lou, X, Bianchi, F, Gamba, D, Pelliccioni, M, Bomben, M, Lanceri, L, Vitale, L, Lopez March, N, Martinez Vidal, F, Oyanguren, A, Albert, J, Banerjee, S, Choi, H, Hamano, K, King, G, Kowalewski, R, Lewczuk, M, Lindsay, C, Nugent, I, Roney, J, Sobie, R, Gershon, T, Harrison, P, Latham, T, Puccio, E, Band, H, Dasu, S, Flood, K, Pan, Y, Prepost, R, Vuosalo, C, Wu, S, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, D., Milane, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, D., Brown, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, A., Randle Conde, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, E., Kravchenko, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, T., Hong, D., Kovalskyi, J., Richman, C., West, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, G., Mancinelli, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, T., Karbach, A., Petzold, B., Spaan, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, S., Tosi, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Adametz, J., Mark, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, L., Dong, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, R., Gamet, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, G., De Nardo, D., Monorchio, G., Onorato, C., Sciacca, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, J., Morri, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, B., Franek, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Zito, M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, S., Li, B., Lindquist, S., Luitz, H., Lynch, D., Macfarlane, H., Marsiske, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, S., Sekula, M., Belli, P., Burchat, A., Edward, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, M., Bomben, Lanceri, Livio, Vitale, Lorenzo, N., Lopez March, F., Martinez Vidal, A., Oyanguren, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, C., Lindsay, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Subjects
BABAR detector, BaBar detector at SLAC
Abstract

We report the results of a study of the exclusive charmless semileptonic decays, B+→η(′)ℓ+ν and B0→π-ℓ+ν, undertaken with approximately 464×106 BB̄ pairs collected at the Υ(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with a loose neutrino reconstruction technique. We obtain partial branching fractions for B+→ηℓ+ν and B0→π-ℓ+ν decays in three and 12 bins of q2, respectively, from which we extract the f+(q2) form-factor shapes and the total branching fractions B(B+→ηℓ +ν)=(0.36±0.05stat±0.04 syst)×10-4 and B(B0→π -ℓ+ν)=(1.42±0.05stat±0. 07syst)×10-4. We also measure B(B +→η′ℓ+ν)=(0.24±0. 08stat±0.03syst)×10-4. We obtain values for the magnitude of the CKM matrix element |Vub| using three different QCD calculations.

Published
2011

48. Search for CP violation in the decay D^{±}→K_{S}^{0}π^{±}

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, D. Milanes, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, D. Brown, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, E. Kravchenko, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, T. Hong, D. Kovalskyi, J. Richman, C. West, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, A. Petzold, B. Spaan, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, I. Garzia, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Edwards, A. Adametz, J. Marks, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, G. De Nardo, D. Monorchio, G. Onorato, C. Sciacca, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, A. Pompili, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, M. Bomben, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, C. Buenger, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, P. Lewis, S. Li, B. Lindquist, S. Luitz, V. Luth, H. Lynch, D. MacFarlane, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, A. Randle Conde, S. Sekula, M. Bellis, P. Burchat, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, N. Lopez March, F. Martinez Vidal, A. Oyanguren, H. Ahmed, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, C. Lindsay, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, LANCERI, LIVIO, VITALE, LORENZO, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, D., Milane, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, D., Brown, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, E., Kravchenko, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, T., Hong, D., Kovalskyi, J., Richman, C., West, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, A., Petzold, B., Spaan, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, I., Garzia, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Edward, A., Adametz, J., Mark, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, G., De Nardo, D., Monorchio, G., Onorato, C., Sciacca, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, A., Pompili, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, M., Bomben, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, C., Buenger, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, P., Lewi, S., Li, B., Lindquist, S., Luitz, V., Luth, H., Lynch, D., Macfarlane, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, A., Randle Conde, S., Sekula, M., Belli, P., Burchat, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, Lanceri, Livio, Vitale, Lorenzo, N., Lopez March, F., Martinez Vidal, A., Oyanguren, H., Ahmed, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, C., Lindsay, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Subjects
BaBar detector at SLAC, D-meson decays, CP violation, D-meson decay
Abstract

We report on a search for CP violation in the decay D±→KS0π± using a data set corresponding to an integrated luminosity of 469 fb-1 collected with the BABAR detector at the PEP-II asymmetric energy e+e- storage rings. The CP-violating decay rate asymmetry ACP is determined to be (-0.44±0.13(stat)±0.10(syst))%, consistent with zero at 2.7σ and with the standard model prediction of (-0.332±0.006)%. This is currently the most precise measurement of this parameter.

Published
2011

49. Measurement of the B0 --> pi- l+ nu and B+ --> eta' l+ nu branching fractions, the B0 --> pi- l+ nu and B+ --> eta l+ nu form-factor shapes, and determination of |V_ub

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, D. Milanes, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, D. Brown, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, A. Randle Conde, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, E. Kravchenko, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, T. Hong, D. Kovalskyi, J. Richman, C. West, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, G. Mancinelli, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, T. Karbach, A. Petzold, B. Spaan, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, S. Tosi, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Adametz, J. Marks, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, L. Dong, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, R. Gamet, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, D. Monorchio, G. Onorato, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, J. Morris, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, B. Franek, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Zito, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, S. Li, B. Lindquist, S. Luitz, H. Lynch, D. MacFarlane, H. Marsiske, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, S. Sekula, M. Bellis, P. Burchat, A. Edwards, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, M. Bomben, L. Lanceri, L. Vitale, N. Lopez March, F. Martinez Vidal, A. Oyanguren, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, C. Lindsay, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, DE NARDO, GUGLIELMO, SCIACCA, CRISOSTOMO, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, D., Milane, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, D., Brown, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, A., Randle Conde, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, E., Kravchenko, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, T., Hong, D., Kovalskyi, J., Richman, C., West, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, G., Mancinelli, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, T., Karbach, A., Petzold, B., Spaan, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, S., Tosi, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Adametz, J., Mark, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, L., Dong, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, R., Gamet, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, DE NARDO, Guglielmo, D., Monorchio, G., Onorato, Sciacca, Crisostomo, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, J., Morri, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, B., Franek, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Zito, M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, S., Li, B., Lindquist, S., Luitz, H., Lynch, D., Macfarlane, H., Marsiske, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, S., Sekula, M., Belli, P., Burchat, A., Edward, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, M., Bomben, L., Lanceri, L., Vitale, N., Lopez March, F., Martinez Vidal, A., Oyanguren, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, C., Lindsay, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Published
2011

50. Search for the rare decay B --> K nu nu

Author

P. del Amo Sanchez, J. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, M. Battaglia, D. Brown, B. Hooberman, L. Kerth, Y.u. Kolomensky, G. Lynch, I. Osipenkov, T. Tanabe, C. Hawkes, A. Watson, H. Koch, T. Schroeder, D. Asgeirsson, C. Hearty, T. Mattison, J. McKenna, A. Khan, A. Randle Conde, V. Blinov, A. Buzykaev, V. Druzhinin, V. Golubev, A. Onuchin, S. Serednyakov, Y.u. Skovpen, E. Solodov, K. Todyshev, A. Yushkov, M. Bondioli, S. Curry, D. Kirkby, A. Lankford, M. Mandelkern, E. Martin, D. Stoker, H. Atmacan, J. Gary, F. Liu, O. Long, G. Vitug, C. Campagnari, T. Hong, D. Kovalskyi, J. Richman, A. Eisner, C. Heusch, J. Kroseberg, W. Lockman, A. Martinez, T. Schalk, B. Schumm, A. Seiden, L. Winstrom, C. Cheng, D. Doll, B. Echenard, D. Hitlin, P. Ongmongkolkul, F. Porter, A. Rakitin, R. Andreassen, M. Dubrovin, G. Mancinelli, B. Meadows, M. Sokoloff, P. Bloom, W. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. Smith, S. Wagner, R. Ayad, W. Toki, H. Jasper, T. Karbach, J. Merkel, A. Petzold, B. Spaan, K. Wacker, M. Kobel, K. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. Clark, S. Playfer, J. Watson, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, A. Cecchi, G. Cibinetto, E. Fioravanti, P. Franchini, E. Luppi, M. Munerato, M. Negrini, A. Petrella, L. Piemontese, R. Baldini Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, M. Nicolaci, S. Pacetti, P. Patteri, I. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. Monge, S. Passaggio, C. Patrignani, E. Robutti, S. Tosi, B. Bhuyan, V. Prasad, C. Lee, M. Morii, A. Adametz, J. Marks, U. Uwer, F. Bernlochner, M. Ebert, H. Lacker, T. Lueck, A. Volk, P. Dauncey, M. Tibbetts, P. Behera, U. Mallik, C. Chen, J. Cochran, H. Crawley, L. Dong, W. Meyer, S. Prell, E. Rosenberg, A. Rubin, Y. Gao, A. Gritsan, Z. Guo, N. Arnaud, M. Davier, D. Derkach, J. Firmino da Costa, G. Grosdidier, F. Le Diberder, A. Lutz, B. Malaescu, A. Perez, P. Roudeau, M. Schune, J. Serrano, V. Sordini, A. Stocchi, L. Wang, G. Wormser, D. Lange, D. Wright, I. Bingham, C. Chavez, J. Coleman, J. Fry, E. Gabathuler, R. Gamet, D. Hutchcroft, D. Payne, C. Touramanis, A. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, S. Paramesvaran, A. Wren, C. Davis, A. Denig, M. Fritsch, W. Gradl, A. Hafner, K. Alwyn, D. Bailey, R. Barlow, G. Jackson, G. Lafferty, T. West, J. Anderson, R. Cenci, A. Jawahery, D. Roberts, G. Simi, J. Tuggle, C. Dallapiccola, E. Salvati, R. Cowan, D. Dujmic, P. Fisher, G. Sciolla, M. Zhao, D. Lindemann, P. Patel, S. Robertson, M. Schram, P. Biassoni, A. Lazzaro, V. Lombardo, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. Summers, X. Nguyen, M. Simard, P. Taras, D. Monorchio, G. Onorato, G. Raven, H. Snoek, C. Jessop, K. Knoepfel, J. LoSecco, W. Wang, L. Corwin, K. Honscheid, R. Kass, J. Morris, N. Blount, J. Brau, R. Frey, O. Igonkina, J. Kolb, R. Rahmat, N. Sinev, D. Strom, J. Strube, E. Torrence, G. Castelli, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Ben Haim, G. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, P.h. Leruste, G. Marchiori, J. Ocariz, J. Prendki, S. Sitt, M. Biasini, E. Manoni, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. Giorgi, A. Lusiani, N. Neri, E. Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, C. Lu, J. Olsen, A. Smith, A. Telnov, F. Anulli, E. Baracchini, G. Cavoto, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. Mazzoni, G. Piredda, F. Renga, T. Hartmann, T. Leddig, H. Schröder, R. Waldi, T. Adye, B. Franek, E. Olaiya, F. Wilson, S. Emery, G. Hamel de Monchenault, G. Vasseur, C.h. Yèche, M. Zito, M. Allen, D. Aston, D. Bard, R. Bartoldus, J. Benitez, C. Cartaro, M. Convery, J. Dorfan, G. Dubois Felsmann, W. Dunwoodie, R. Field, M. Franco Sevilla, B. Fulsom, A. Gabareen, M. Graham, P. Grenier, C. Hast, W. Innes, M. Kelsey, H. Kim, P. Kim, M. Kocian, D. Leith, S. Li, B. Lindquist, S. Luitz, V. Luth, H. Lynch, D. MacFarlane, H. Marsiske, D. Muller, H. Neal, S. Nelson, C. O’Grady, I. Ofte, M. Perl, T. Pulliam, B. Ratcliff, A. Roodman, A. Salnikov, V. Santoro, R. Schindler, J. Schwiening, A. Snyder, D. Su, M. Sullivan, S. Sun, K. Suzuki, J. Thompson, J. Va’vra, A. Wagner, M. Weaver, C. West, W. Wisniewski, M. Wittgen, H. Wulsin, A. Yarritu, C. Young, V. Ziegler, X. Chen, W. Park, M. Purohit, R. White, J. Wilson, S. Sekula, M. Bellis, P. Burchat, A. Edwards, T. Miyashita, S. Ahmed, M. Alam, J. Ernst, B. Pan, M. Saeed, S. Zain, N. Guttman, A. Soffer, P. Lund, S. Spanier, R. Eckmann, J. Ritchie, A. Ruland, C. Schilling, R. Schwitters, B. Wray, J. Izen, X. Lou, F. Bianchi, D. Gamba, M. Pelliccioni, M. Bomben, L. Lanceri, L. Vitale, N. Lopez March, F. Martinez Vidal, D. Milanes, A. Oyanguren, J. Albert, S.w. Banerjee, H. Choi, K. Hamano, G. King, R. Kowalewski, M. Lewczuk, I. Nugent, J. Roney, R. Sobie, T. Gershon, P. Harrison, T. Latham, E. Puccio, H. Band, S. Dasu, K. Flood, Y. Pan, R. Prepost, C. Vuosalo, S. Wu, DE NARDO, GUGLIELMO, SCIACCA, CRISOSTOMO, P., del Amo Sanchez, J., Lee, V., Poireau, E., Prencipe, V., Tisserand, J., Garra Tico, E., Grauge, M., Martinelli, A., Palano, M., Pappagallo, G., Eigen, B., Stugu, L., Sun, M., Battaglia, D., Brown, B., Hooberman, L., Kerth, Kolomensky, Y. u., G., Lynch, I., Osipenkov, T., Tanabe, C., Hawke, A., Watson, H., Koch, T., Schroeder, D., Asgeirsson, C., Hearty, T., Mattison, J., Mckenna, A., Khan, A., Randle Conde, V., Blinov, A., Buzykaev, V., Druzhinin, V., Golubev, A., Onuchin, S., Serednyakov, Skovpen, Y. u., E., Solodov, K., Todyshev, A., Yushkov, M., Bondioli, S., Curry, D., Kirkby, A., Lankford, M., Mandelkern, E., Martin, D., Stoker, H., Atmacan, J., Gary, F., Liu, O., Long, G., Vitug, C., Campagnari, T., Hong, D., Kovalskyi, J., Richman, A., Eisner, C., Heusch, J., Kroseberg, W., Lockman, A., Martinez, T., Schalk, B., Schumm, A., Seiden, L., Winstrom, C., Cheng, D., Doll, B., Echenard, D., Hitlin, P., Ongmongkolkul, F., Porter, A., Rakitin, R., Andreassen, M., Dubrovin, G., Mancinelli, B., Meadow, M., Sokoloff, P., Bloom, W., Ford, A., Gaz, M., Nagel, U., Nauenberg, J., Smith, S., Wagner, R., Ayad, W., Toki, H., Jasper, T., Karbach, J., Merkel, A., Petzold, B., Spaan, K., Wacker, M., Kobel, K., Schubert, R., Schwierz, D., Bernard, M., Verderi, P., Clark, S., Playfer, J., Watson, M., Andreotti, D., Bettoni, C., Bozzi, R., Calabrese, A., Cecchi, G., Cibinetto, E., Fioravanti, P., Franchini, E., Luppi, M., Munerato, M., Negrini, A., Petrella, L., Piemontese, R., Baldini Ferroli, A., Calcaterra, R., de Sangro, G., Finocchiaro, M., Nicolaci, S., Pacetti, P., Patteri, I., Peruzzi, M., Piccolo, M., Rama, A., Zallo, R., Contri, E., Guido, M., Lo Vetere, M., Monge, S., Passaggio, C., Patrignani, E., Robutti, S., Tosi, B., Bhuyan, V., Prasad, C., Lee, M., Morii, A., Adametz, J., Mark, U., Uwer, F., Bernlochner, M., Ebert, H., Lacker, T., Lueck, A., Volk, P., Dauncey, M., Tibbett, P., Behera, U., Mallik, C., Chen, J., Cochran, H., Crawley, L., Dong, W., Meyer, S., Prell, E., Rosenberg, A., Rubin, Y., Gao, A., Gritsan, Z., Guo, N., Arnaud, M., Davier, D., Derkach, J., Firmino da Costa, G., Grosdidier, F., Le Diberder, A., Lutz, B., Malaescu, A., Perez, P., Roudeau, M., Schune, J., Serrano, V., Sordini, A., Stocchi, L., Wang, G., Wormser, D., Lange, D., Wright, I., Bingham, C., Chavez, J., Coleman, J., Fry, E., Gabathuler, R., Gamet, D., Hutchcroft, D., Payne, C., Touramani, A., Bevan, F., Di Lodovico, R., Sacco, M., Sigamani, G., Cowan, S., Paramesvaran, A., Wren, C., Davi, A., Denig, M., Fritsch, W., Gradl, A., Hafner, K., Alwyn, D., Bailey, R., Barlow, G., Jackson, G., Lafferty, T., West, J., Anderson, R., Cenci, A., Jawahery, D., Robert, G., Simi, J., Tuggle, C., Dallapiccola, E., Salvati, R., Cowan, D., Dujmic, P., Fisher, G., Sciolla, M., Zhao, D., Lindemann, P., Patel, S., Robertson, M., Schram, P., Biassoni, A., Lazzaro, V., Lombardo, F., Palombo, S., Stracka, L., Cremaldi, R., Godang, R., Kroeger, P., Sonnek, D., Summer, X., Nguyen, M., Simard, P., Tara, DE NARDO, Guglielmo, D., Monorchio, G., Onorato, Sciacca, Crisostomo, G., Raven, H., Snoek, C., Jessop, K., Knoepfel, J., Losecco, W., Wang, L., Corwin, K., Honscheid, R., Ka, J., Morri, N., Blount, J., Brau, R., Frey, O., Igonkina, J., Kolb, R., Rahmat, N., Sinev, D., Strom, J., Strube, E., Torrence, G., Castelli, E., Feltresi, N., Gagliardi, M., Margoni, M., Morandin, M., Posocco, M., Rotondo, F., Simonetto, R., Stroili, E., Ben Haim, G., Bonneaud, H., Briand, G., Calderini, J., Chauveau, O., Hamon, Leruste, P. h., G., Marchiori, J., Ocariz, J., Prendki, S., Sitt, M., Biasini, E., Manoni, A., Rossi, C., Angelini, G., Batignani, S., Bettarini, M., Carpinelli, G., Casarosa, A., Cervelli, F., Forti, M., Giorgi, A., Lusiani, N., Neri, E., Paoloni, G., Rizzo, J., Walsh, D., Lopes Pegna, C., Lu, J., Olsen, A., Smith, A., Telnov, F., Anulli, E., Baracchini, G., Cavoto, R., Faccini, F., Ferrarotto, F., Ferroni, M., Gaspero, L., Li Gioi, M., Mazzoni, G., Piredda, F., Renga, T., Hartmann, T., Leddig, H., Schröder, R., Waldi, T., Adye, B., Franek, E., Olaiya, F., Wilson, S., Emery, G., Hamel de Monchenault, G., Vasseur, Yèche, C. h., M., Zito, M., Allen, D., Aston, D., Bard, R., Bartoldu, J., Benitez, C., Cartaro, M., Convery, J., Dorfan, G., Dubois Felsmann, W., Dunwoodie, R., Field, M., Franco Sevilla, B., Fulsom, A., Gabareen, M., Graham, P., Grenier, C., Hast, W., Inne, M., Kelsey, H., Kim, P., Kim, M., Kocian, D., Leith, S., Li, B., Lindquist, S., Luitz, V., Luth, H., Lynch, D., Macfarlane, H., Marsiske, D., Muller, H., Neal, S., Nelson, C., O’Grady, I., Ofte, M., Perl, T., Pulliam, B., Ratcliff, A., Roodman, A., Salnikov, V., Santoro, R., Schindler, J., Schwiening, A., Snyder, D., Su, M., Sullivan, S., Sun, K., Suzuki, J., Thompson, J., Va’Vra, A., Wagner, M., Weaver, C., West, W., Wisniewski, M., Wittgen, H., Wulsin, A., Yarritu, C., Young, V., Ziegler, X., Chen, W., Park, M., Purohit, R., White, J., Wilson, S., Sekula, M., Belli, P., Burchat, A., Edward, T., Miyashita, S., Ahmed, M., Alam, J., Ernst, B., Pan, M., Saeed, S., Zain, N., Guttman, A., Soffer, P., Lund, S., Spanier, R., Eckmann, J., Ritchie, A., Ruland, C., Schilling, R., Schwitter, B., Wray, J., Izen, X., Lou, F., Bianchi, D., Gamba, M., Pelliccioni, M., Bomben, L., Lanceri, L., Vitale, N., Lopez March, F., Martinez Vidal, D., Milane, A., Oyanguren, J., Albert, Banerjee, S. w., H., Choi, K., Hamano, G., King, R., Kowalewski, M., Lewczuk, I., Nugent, J., Roney, R., Sobie, T., Gershon, P., Harrison, T., Latham, E., Puccio, H., Band, S., Dasu, K., Flood, Y., Pan, R., Prepost, C., Vuosalo, and S., Wu

Published
2010

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