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1. Search for the X17 particle in $^{7}\mathrm{Li}(\mathrm{p},\mathrm{e}^+ \mathrm{e}^{-}) ^{8}\mathrm{Be}$ processes with the MEG II detector

Author

The MEG II collaboration, Afanaciev, K., Baldini, A. M., Ban, S., Benmansour, H., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Chiappini, M., Corvaglia, A., Maso, G. Dal, De Bari, A., De Gerone, M., Barusso, L. Ferrari, Francesconi, M., Galli, L., Gallucci, G., Gatti, F., Gerritzen, L., Grancagnolo, F., Grandoni, E. G., Grassi, M., Grigoriev, D. N., Hildebrandt, M., Ignatov, F., Ikeda, F., Iwamoto, T., Karpov, S., Kettle, P. -R., Khomutov, N., Kolesnikov, A., Kravchuk, N., Krylov, V., Kuchinskiy, N., Leonetti, F., Li, W., Malyshev, V., Matsushita, A., Meucci, M., Mihara, S., Molzon, W., Mori, T., Nicolò, D., Nishiguchi, H., Ochi, A., Ootani, W., Oya, A., Palo, D., Panareo, M., Papa, A., Pettinacci, V., Popov, A., Renga, F., Ritt, S., Rossella, M., Scarpellini, A. Rozhdestvensky. S., Schwendimann, P., Signorelli, G., Takahashi, M., Uchiyama, Y., Venturini, A., Vitali, B., Voena, C., Yamamoto, K., Yokota, R., and Yonemoto, T.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

The observation of a resonance structure in the opening angle of the electron-positron pairs in the $^{7}$Li(p,\ee) $^{8}$Be reaction was claimed and interpreted as the production and subsequent decay of a hypothetical particle (X17). Similar excesses, consistent with this particle, were later observed in processes involving $^{4}$He and $^{12}$C nuclei with the same experimental technique. The MEG II apparatus at PSI, designed to search for the $\mu^+ \rightarrow \mathrm{e}^+ \gamma$ decay, can be exploited to investigate the existence of this particle and study its nature. Protons from a Cockroft-Walton accelerator, with an energy up to 1.1 MeV, were delivered on a dedicated Li-based target. The $\gamma$ and the e$^{+}$e$^{-}$ pair emerging from the $^8\mathrm{Be}^*$ transitions were studied with calorimeters and a spectrometer, featuring a broader angular acceptance than previous experiments. We present in this paper the analysis of a four-week data-taking in 2023 with a beam energy of 1080 keV, resulting in the excitation of two different resonances with Q-value \SI{17.6}{\mega\electronvolt} and \SI{18.1}{\mega\electronvolt}. No significant signal was found, and limits at \SI{90}{\percent} C.L. on the branching ratios (relative to the $\gamma$ emission) of the two resonances to X17 were set, $R_{17.6} < 1.8 \times 10^{-6} $ and $R_{18.1} < 1.2 \times 10^{-5} $., Comment: 11 pages, 9 figures, submitted to EPJC

Published
2024

2. A search for $\mu^+\to e^+\gamma$ with the first dataset of the MEG II experiment

Author

MEG II collaboration, Afanaciev, K., Baldini, A. M., Ban, S., Baranov, V., Benmansour, H., Biasotti, M., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Chiappini, M., Chiarello, G., Corvaglia, A., Cuna, F., Maso, G. Dal, De Bari, A., De Gerone, M., Barusso, L. Ferrari, Francesconi, M., Galli, L., Gallucci, G., Gatti, F., Gerritzen, L., Grancagnolo, F., Grandoni, E. G., Grassi, M., Grigoriev, D. N., Hildebrandt, M., Ieki, K., Ignatov, F., Ikeda, F., Iwamoto, T., Karpov, S., Kettle, P. -R., Khomutov, N., Kobayashi, S., Kolesnikov, A., Kravchuk, N., Krylov, V., Kuchinskiy, N., Kyle, W., Libeiro, T., Malyshev, V., Matsushita, A., Meucci, M., Mihara, S., Molzon, W., Mori, Toshinori, Nakao, M., Nicolò, D., Nishiguchi, H., Ochi, A., Ogawa, S., Onda, R., Ootani, W., Oya, A., Palo, D., Panareo, M., Papa, A., Pettinacci, V., Popov, A., Renga, F., Ritt, S., Rossella, M., Rozhdestvensky, A., Schwendimann, P., Shimada, K., Signorelli, G., Takahashi, M., Tassielli, G. F., Toyoda, K., Uchiyama, Y., Usami, M., Venturini, A., Vitali, B., Voena, C., Yamamoto, K., Yanai, K., Yonemoto, T., Yoshida, K., and Yudin, Yu. V.

Subjects
High Energy Physics - Experiment
Abstract

The MEG II experiment, based at the Paul Scherrer Institut in Switzerland, reports the result of a search for the decay $\mu^+\to e^+\gamma$ from data taken in the first physics run in 2021. No excess of events over the expected background is observed, yielding an upper limit on the branching ratio of B($\mu^+\to e^+\gamma$) < $7.5 \times 10^{-13}$ (90% C.L.). The combination of this result and the limit obtained by MEG gives B($\mu^+\to e^+\gamma$) < $3.1 \times 10^{-13}$ (90% C.L.), which is the most stringent limit to date. A ten-fold larger sample of data is being collected during the years 2022-2023, and data-taking will continue in the coming years., Comment: 10 pages, 6 figures. To be published in EPJC

Published
2023

3. Operation and performance of MEG II detector

Author

MEG II Collaboration, Afanaciev, K., Baldini, A. M., Ban, S., Baranov, V., Benmansour, H., Biasotti, M., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Chiappini, M., Chiarello, G., Corvaglia, A., Cuna, F., Maso, G. Dal, De Bari, A., De Gerone, M., Barusso, L. Ferrari, Francesconi, M., Galli, L., Gallucci, G., Gatti, F., Gerritzen, L., Grancagnolo, F., Grandoni, E. G., Grassi, M., Grigoriev, D. N., Hildebrandt, M., Ieki, K., Ignatov, F., Ikeda, F., Iwamoto, T., Karpov, S., Kettle, P. -R., Khomutov, N., Kobayashi, S., Kolesnikov, A., Kravchuk, N., Krylov, V., Kuchinskiy, N., Kyle, W., Libeiro, T., Malyshev, V., Matsushita, A., Meucci, M., Mihara, S., Molzon, W., Mori, Toshinori, Morsani, F., Nakao, M., Nicolò, D., Nishiguchi, H., Ochi, A., Ogawa, S., Onda, R., Ootani, W., Oya, A., Palo, D., Panareo, M., Papa, A., Pettinacci, V., Popov, A., Raffaelli, F., Renga, F., Ritt, S., Rossella, M., Rozhdestvensky, A., Schwendimann, P., Shimada, K., Signorelli, G., Stoykov, A., Takahashi, M., Tassielli, G. F., Toyoda, K., Uchiyama, Y., Usami, M., Venturini, A., Vitali, B., Voena, C., Yamamoto, K., Yanai, K., Yonemoto, T., Yoshida, K., and Yudin, Yu. V.

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

The MEG II experiment, located at the Paul Scherrer Institut (PSI) in Switzerland, is the successor to the MEG experiment, which completed data taking in 2013. MEG II started fully operational data taking in 2021, with the goal of improving the sensitivity of the mu+ -> e+ gamma decay down to 6e-14 almost an order of magnitude better than the current limit. In this paper, we describe the operation and performance of the experiment and give a new estimate of its sensitivity versus data acquisition time., Comment: 42 pages, 55 figures. Submitted to EPJC

Published
2023

4. Possible associations between antioxidant enzyme polymorphisms and metabolic abnormalities in patients with schizophrenia

Author

Saruwatari J, Yasui-Furukori N, Kamihashi R, Yoshimori Y, Oniki K, Tsuchimine S, Noai M, Sato Y, Nakagami T, Sugawara N, Saito M, Fujii A, Kajiwara A, Mihara S, Ogata Y, Kaneko S, and Nakagawa K

Subjects
Neurosciences. Biological psychiatry. Neuropsychiatry, RC321-571, Neurology. Diseases of the nervous system, RC346-429
Abstract

Junji Saruwatari,1,* Norio Yasui-Furukori,2,* Ryoko Kamihashi,1 Yuki Yoshimori,1 Kentaro Oniki,1 Shoko Tsuchimine,2 Madoka Noai,1 Yasushi Sato,3 Taku Nakagami,4 Norio Sugawara,2 Manabu Saito,2 Akira Fujii,2 Ayami Kajiwara,1 Shuichi Mihara,5 Yasuhiro Ogata,6 Sunao Kaneko,2 Kazuko Nakagawa1,71Division of Pharmacology and Therapeutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, 2Department of Neuropsychiatry, Hirosaki University School of Medicine, Hirosaki, 3Department of Psychiatry, Hirosaki Aiseikai Hospital, Hirosaki, 4Department of Psychiatry, Odate Municipal General Hospital, Odate, 5Mihara Life Care Clinic, Kumamoto, 6Japanese Red Cross Kumamoto Health Care Center, Kumamoto, 7Center for Clinical Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan*These authors contributed equally to this paperBackground: This study investigated the possible association between common and potentially functional polymorphisms of antioxidant enzymes and metabolic abnormalities in patients with schizophrenia.Methods: The possible associations of the glutathione S-transferase (GST) M1 null and GSTT1 null genotypes, and the superoxide dismutase 2 (SOD2) Val16Ala polymorphism with the risks of being overweight and having metabolic syndrome were examined using a logistic regression analysis in 154 schizophrenic Japanese patients and 203 controls.Results: Among smokers with schizophrenia, the risks of being overweight and having decreased high-density lipoprotein cholesterol were significantly higher in those with the GSTM1 null genotype than in those with the present genotype (odds ratio 3.20 and 3.15, P=0.03 and P=0.04, respectively), while among nonsmokers with schizophrenia, the risk of an abnormal waist circumference was lower in those with the GSTM1 null genotype (odds ratio 0.34, P=0.04). The risk of a decreased high-density lipoprotein cholesterol level was significantly higher in patients with the combined GSTM1 null and GSTT1 present genotypes than in those with the present genotypes of both genes (odds ratio 3.60, P

Published
2013

5. A search for μ+→e+γ with the first dataset of the MEG II experiment

Author

Afanaciev, K., Baldini, A. M., Ban, S., Baranov, V., Benmansour, H., Biasotti, M., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Chiappini, M., Chiarello, G., Corvaglia, A., Cuna, F., Maso, G. Dal, De Bari, A., De Gerone, M., Barusso, L. Ferrari, Francesconi, M., Galli, L., Gallucci, G., Gatti, F., Gerritzen, L., Grancagnolo, F., Grandoni, E. G., Grassi, M., Grigoriev, D. N., Hildebrandt, M., Ieki, K., Ignatov, F., Ikeda, F., Iwamoto, T., Karpov, S., Kettle, P.-R., Khomutov, N., Kobayashi, S., Kolesnikov, A., Kravchuk, N., Krylov, V., Kuchinskiy, N., Kyle, W., Libeiro, T., Malyshev, V., Matsushita, A., Meucci, M., Mihara, S., Molzon, W., Mori, Toshinori, Nakao, M., Nicolò, D., Nishiguchi, H., Ochi, A., Ogawa, S., Onda, R., Ootani, W., Oya, A., Palo, D., Panareo, M., Papa, A., Pettinacci, V., Popov, A., Renga, F., Ritt, S., Rossella, M., Rozhdestvensky, A., Schwendimann, P., Shimada, K., Signorelli, G., Takahashi, M., Tassielli, G. F., Toyoda, K., Uchiyama, Y., Usami, M., Venturini, A., Vitali, B., Voena, C., Yamamoto, K., Yanai, K., Yonemoto, T., Yoshida, K., and Yudin, Yu. V.

Published
2024
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6. A New Charged Lepton Flavor Violation Program at Fermilab

Author

Aoki, M., Appleby, R. B., Aslaninejad, M., Barlow, R., Bernstein, R. H., Bloise, C., Calibbi, L., Cervelli, F., Culbertson, R., de Gouvea, Andre Luiz, Di Falco, S., Diociaiuti, E., Donati, S., Donghia, R., Echenard, B., Gaponenko, A., Giovannella, S., Group, C., Happacher, F., Hedges, M. T., Hitlin, D. G., Hungerford, E., Johnstone, C., Kaplan, D. M., Kargiantoulakis, M., Kelliher, D. J., Kirch, K., Knecht, A., Kuno, Y., Kurup, A., Lagrange, J. -B., Lancaster, M., Long, K., Luca, A., Lynch, K., Machida, S., Martini, M., Middleton, S., Mihara, S., Miller, J., Miscetti, S., Morescalchi, L., Mori, Y., Murat, P., Muratori, B., Neuffer, D., Papa, A., Pasternak, J., Pedreschi, E., Pezzullo, G., Planche, T., Porter, F., Prebys, E., Prior, C. R., Pronskikh, V., Ray, R., Renga, F., Rogers, C., Sarra, I., Sato, A., Smith, S. L., Spinella, F., Stratakis, D., Syphers, M., Truong, N. M., Tygier, S., Uchida, Y., and Yucel, M.

Subjects
High Energy Physics - Experiment
Abstract

The muon has played a central role in establishing the Standard Model of particle physics, and continues to provide valuable information about the nature of new physics. A new complex at Fermilab, the Advanced Muon Facility, would provide the world's most intense positive and negative muon beams by exploiting the full potential of PIP-II and the Booster upgrade. This facility would enable a broad muon physics program, including studies of charged lepton flavor violation, muonium-antimuonium transitions, a storage ring muon EDM experiment, and muon spin rotation experiments. This document describes a staged realization of this complex, together with a series of next-generation experiments to search for charged lepton flavor violation., Comment: A Contributed Paper for Snowmass 2021

Published
2022

7. Testing Lepton Flavor Universality and CKM Unitarity with Rare Pion Decays in the PIONEER experiment

Author

PIONEER Collaboration, Altmannshofer, W., Binney, H., Blucher, E., Bryman, D., Caminada, L., Chen, S., Cirigliano, V., Corrodi, S., Crivellin, A., Cuen-Rochin, S., Di Canto, A., Doria, L., Gaponenko, A., Garcia, A., Gibbons, L., Glaser, C., Godoy, M. Escobar, Göldi, D., Gori, S., Gorringe, T., Hertzog, D., Hodge, Z., Hoferichter, M., Ito, S., Iwamoto, T., Kammel, P., Kiburg, B., Labe, K., LaBounty, J., Langenegger, U., Malbrunot, C., Mazza, S. M., Mihara, S., Mischke, R., Mori, T., Mott, J., Numao, T., Ootani, W., Ott, J., Pachal, K., Polly, C., Počanić, D., Qian, X., Ries, D., Roehnelt, R., Schumm, B., Schwendimann, P., Seiden, A., Sher, A., Shrock, R., Soter, A., Sullivan, T., Tarka, M., Tischenko, V., Tricoli, A., Velghe, B., Wong, V., Worcester, E., Worcester, M., and Zhang, C.

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

The physics motivation and the conceptual design of the PIONEER experiment, a next-generation rare pion decay experiment testing lepton flavor universality and CKM unitarity, are described. Phase I of the PIONEER experiment, which was proposed and approved at Paul Scherrer Institut, aims at measuring the charged-pion branching ratio to electrons vs.\ muons, $R_{e/\mu}$, 15 times more precisely than the current experimental result, reaching the precision of the Standard Model (SM) prediction at 1 part in $10^4$. Considering several inconsistencies between the SM predictions and data pointing towards the potential violation of lepton flavor universality, the PIONEER experiment will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles up to the PeV mass scale. The later phases of the PIONEER experiment aim at improving the experimental precision of the branching ratio of pion beta decay (BRPB), $\pi^+\to \pi^0 e^+ \nu (\gamma)$, currently at $1.036(6)\times10^{-8}$, by a factor of three (Phase II) and an order of magnitude (Phase III). Such precise measurements of BRPB will allow for tests of CKM unitarity in light of the Cabibbo Angle Anomaly and the theoretically cleanest extraction of $|V_{ud}|$ at the 0.02\% level, comparable to the deduction from superallowed beta decays., Comment: contribution to Snowmass 2021 based on the PIONEER proposal (arXiv:2203.01981)

Published
2022

8. PIONEER: Studies of Rare Pion Decays

Author

PIONEER Collaboration, Altmannshofer, W., Binney, H., Blucher, E., Bryman, D., Caminada, L., Chen, S., Cirigliano, V., Corrodi, S., Crivellin, A., Cuen-Rochin, S., DiCanto, A., Doria, L., Gaponenko, A., Garcia, A., Gibbons, L., Glaser, C., Godoy, M. Escobar, Göldi, D., Gori, S., Gorringe, T., Hertzog, D., Hodge, Z., Hoferichter, M., Ito, S., Iwamoto, T., Kammel, P., Kiburg, B., Labe, K., LaBounty, J., Langenegger, U., Malbrunot, C., Mazza, S. M., Mihara, S., Mischke, R., Mori, T., Mott, J., Numao, T., Ootani, W., Ott, J., Pachal, K., Polly, C., Počanić, D., Qian, X., Ries, D., Roehnelt, R., Schumm, B., Schwendimann, P., Seiden, A., Sher, A., Shrock, R., Soter, A., Sullivan, T., Tarka, M., Tischenko, V., Tricoli, A., Velghe, B., Wong, V., Worcester, E., Worcester, M., and Zhang, C.

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

A next-generation rare pion decay experiment, PIONEER, is strongly motivated by several inconsistencies between Standard Model (SM) predictions and data pointing towards the potential violation of lepton flavor universality. It will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles even if their masses are at very high scales. Measurement of the charged-pion branching ratio to electrons vs. muons $R_{e/\mu}$ is extremely sensitive to new physics effects. At present, the SM prediction for $R_{e/\mu}$ is known to 1 part in $10^4$, which is 15 times more precise than the current experimental result. An experiment reaching the theoretical accuracy will test lepton flavor universality at an unprecedented level, probing mass scales up to the PeV range. Measurement of pion beta decay, $\pi^+\to \pi^0 e^+ \nu (\gamma)$, with 3 to 10-fold improvement in sensitivity, will determine $V_{ud}$ in a theoretically pristine manner and test CKM unitarity, which is very important in light of the recently emerged tensions. In addition, various exotic rare decays involving sterile neutrinos and axions will be searched for with unprecedented sensitivity. The experiment design benefits from experience with the recent PIENU and PEN experiments at TRIUMF and the Paul Scherrer Institut (PSI). Excellent energy and time resolutions, greatly increased calorimeter depth, high-speed detector and electronics response, large solid angle coverage, and complete event reconstruction are all critical aspects of the approach. The PIONEER experiment design includes a 3$\pi$ sr 25 radiation length calorimeter, a segmented low gain avalanche detector stopping target, a positron tracker, and other detectors. Using intense pion beams, and state-of-the-art instrumentation and computational resources, the experiments can be performed at the PSI ring cyclotron.

Published
2022

9. Search for lepton flavour violating muon decay mediated by a new light particle in the MEG experiment

Author

Baldini, A. M., Berg, F., Biasotti, M., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Chiappini, M., Chiarello, G., Chiri, C., Corvaglia, A., de Bari, A., De Gerone, M., Francesconi, M., Galli, L., Gatti, F., Grancagnolo, F., Grassi, M., Grigoriev, D. N., Hildebrandt, M., Hodge, Z., Ieki, K., Ignatov, F., Iwai, R., Iwamoto, T., Kobayashi, S., Kettle, P. -R., Kyle, W., Khomutov, N., Kolesnikov, A., Kravchuk, N., Kuchinskiy, N., Libeiro, T., Lim, G. M. A., Malyshev, V., Matsuzawa, N., Meucci, M., Mihara, S., Molzon, W., Mori, Toshinori, Mtchedilishvili, A., Nakao, M., Natori, H., Nicolò, D., Nishiguchi, H., Nishimura, M., Ogawa, S., Onda, R., Ootani, W., Oya, A., Palo, D., Panareo, M., Papa, A., Pettinacci, V., Pizzigoni, G., Popov, A., Renga, F., Ritt, S., Rozhdestvensky, A., Rossella, M., Sawada, R., Schwendimann, P., Signorelli, G., Stoykov, A., Tassielli, G. F., Toyoda, K., Uchiyama, Y., Usami, M., Voena, C., Yanai, K., and Yudin, Yu. V.

Subjects
High Energy Physics - Experiment
Abstract

We present the first direct search for lepton flavour violating muon decay mediated by a new light particle X, $\mu^+ \to \mathrm{e}^+\mathrm{X}, \mathrm{X} \to \gamma\gamma$. This search uses a dataset resulting from $7.5\times 10^{14}$ stopped muons collected by the MEG experiment at the Paul Scherrer Institut in the period 2009--2013. No significant excess is found in the mass region 20--45 MeV/c$^2$ for lifetimes below 40 ps, and we set the most stringent branching ratio upper limits in the mass region of 20--40 MeV/c$^2$, down to $\mathcal{O}(10^{-11})$ at 90\% confidence level.

Published
2020
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10. COMET Phase-I Technical Design Report

Author

The COMET Collaboration, Abramishvili, R., Adamov, G., Akhmetshin, R. R., Allin, A., Angélique, J. C., Anishchik, V., Aoki, M., Aznabayev, D., Bagaturia, I., Ban, G., Ban, Y., Bauer, D., Baygarashev, D., Bondar, A. E., Cârloganu, C., Carniol, B., Chau, T. T., Chen, J. K., Chen, S. J., Cheung, Y. E., da Silva, W., Dauncey, P. D., Densham, C., Devidze, G., Dornan, P., Drutskoy, A., Duginov, V., Eguchi, Y., Epshteyn, L. B., Evtoukhovich, P., Fayer, S., Fedotovich, G. V., Finger Jr, M., Finger, M., Fujii, Y., Fukao, Y., Gabriel, J. L., Gay, P., Gillies, E., Grigoriev, D. N., Gritsay, K., Hai, V. H., Hamada, E., Hashim, I. H., Hashimoto, S., Hayashi, O., Hayashi, T., Hiasa, T., Ibrahim, Z. A., Igarashi, Y., Ignatov, F. V., Iio, M., Ishibashi, K., Issadykov, A., Itahashi, T., Jansen, A., Jiang, X. S., Jonsson, P., Kachelhoffer, T., Kalinnikov, V., Kaneva, E., Kapusta, F., Katayama, H., Kawagoe, K., Kawashima, R., Kazak, N., Kazanin, V. F., Kemularia, O., Khvedelidze, A., Koike, M., Kormoll, T., Kozlov, G. A., Kozyrev, A. N., Kravchenko, M., Krikler, B., Kumsiashvili, G., Kuno, Y., Kuriyama, Y., Kurochkin, Y., Kurup, A., Lagrange, B., Lai, J., Lee, M. J., Li, H. B., Litchfield, R. P., Li, W. G., Loan, T., Lomidze, D., Lomidze, I., Loveridge, P., Macharashvili, G., Makida, Y., Mao, Y. J., Markin, O., Matsuda, Y., Melkadze, A., Melnik, A., Mibe, T., Mihara, S., Miyamoto, N., Miyazaki, Y., Idris, F. Mohamad, Azmi, K. A. Mohamed Kamal, Moiseenko, A., Moritsu, M., Mori, Y., Motoishi, T., Nakai, H., Nakai, Y., Nakamoto, T., Nakamura, Y., Nakatsugawa, Y., Nakazawa, Y., Nash, J., Natori, H., Niess, V., Nioradze, M., Nishiguchi, H., Noguchi, K., Numao, T., O'Dell, J., Ogitsu, T., Ohta, S., Oishi, K., Okamoto, K., Okamura, T., Okinaka, K., Omori, C., Ota, T., Pasternak, J., Paulau, A., Picters, D., Ponariadov, V., Quémener, G., Ruban, A. A., Rusinov, V., Sabirov, B., Sakamoto, H., Sarin, P., Sasaki, K., Sato, A., Sato, J., Semertzidis, Y. K., Shigyo, N., Shoukavy, Dz., Slunecka, M., Stöckinger, D., Sugano, M., Tachimoto, T., Takayanagi, T., Tanaka, M., Tang, J., Tao, C. V., Teixeira, A. M., Tevzadze, Y., Thanh, T., Tojo, J., Tolmachev, S. S., Tomasek, M., Tomizawa, M., Toriashvili, T., Trang, H., Trekov, I., Tsamalaidze, Z., Tsverava, N., Uchida, T., Uchida, Y., Ueno, K., Velicheva, E., Volkov, A., Vrba, V., Abdullah, W. A. T. Wan, Warin-Charpentier, P., Wong, M. L., Wong, T. S., Wu, C., Xing, T. Y., Yamaguchi, H., Yamamoto, A., Yamanaka, M., Yamane, T., Yang, Y., Yano, T., Yao, W. C., Yeo, B., Yoshida, H., Yoshida, M., Yoshioka, T., Yuan, Y., Yudin, Yu. V., Zdorovets, M. V., Zhang, J., Zhang, Y., and Zuber, K.

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

The Technical Design for the COMET Phase-I experiment is presented in this paper. COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in the field of an aluminium nucleus ($\mu-e$ conversion, $\mu^- N \to e^- N$); a lepton flavor violating process. The experimental sensitivity goal for this process in the Phase-I experiment is $3.1\times10^{-15}$, or 90 % upper limit of branching ratio of $7\times 10^{-15}$, which is a factor of 100 improvement over the existing limit. The expected number of background events is 0.032. To achieve the target sensitivity and background level, the 3.2 kW 8 GeV proton beam from J-PARC will be used. Two types of detectors, CyDet and StrECAL, will be used for detecting the \mue conversion events, and for measuring the beam-related background events in view of the Phase-II experiment, respectively. Results from simulation on signal and background estimations are also described., Comment: A minor correction applied in Eq. 3

Published
2018
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11. The design of the MEG II experiment

Author

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., Nicoló, 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
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The MEG experiment, designed to search for the mu+->e+ gamma decay at a 10^-13 sensitivity level, completed data taking in 2013. In order to increase the sensitivity reach of the experiment by an order of magnitude to the level of 6 x 10-14 for the branching ratio, 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., Comment: 61 pages and 97 figures

Published
2018
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12. A Fast High-Voltage Switching Multiwire Proportional Chamber

Author

Natori, H., Teshima, N., Aoki, M., Nishiguchi, H., Nguyen, T. D., Takezaki, Y., Furuya, Y., Ito, S., Mihara, S., Nagao, D., Nakatsugawa, Y., Nguyen, T. M., Seiya, Y., Shimizu, K., and Yamamoto, K.

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

A new experiment, called DeeMe, which is designed to search for $\mu$-e conversions with a sensitivity of $\mathcal{O}(10^{-14})$, is in preparation at the Japan Proton Accelerator Research Complex (J-PARC). It utilizes a high-quality pulsed proton beam from the Rapid Cycling Synchrotron at J-PARC. The detector for DeeMe must tolerate large pulses of prompt charged particles whose instantaneous hit rate is as large as 70 GHz/mm$^2$ in a time width of 200 ns and detect a single electron that arrives with delayed timing on the order of microseconds. A special wire chamber has been developed with a new dynamic gain control technique that reduces space charge effects. In this paper, we detail the novel detector scheme and operation verification., Comment: To be published in PTEP

Published
2016

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

Author

Baldini, A. M., Bao, Y., Baracchini, E., Bemporad, C., Berg, F., Biasotti, M., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Chiarello, G., Chiri, C., De Bari, A., De Gerone, M., DÓnofrio, A., Dussoni, S., Fujii, Y., Galli, L., Gatti, F., Grancagnolo, F., Grassi, M., Graziosi, A., Grigoriev, D. N., Haruyama, T., Hildebrandt, M., Hodge, Z., Ieki, K., Ignatov, F., Iwamoto, T., Kaneko, D., Kang, T. I., Kettle, P. R., Khazin, B. I., Khomutov, N., Korenchenko, A., Kravchuk, N., Lim, G. M. A., Mihara, S., Molzon, W., Mori, T., Mtchedlishvili, A., Nakaura, S., Nicolò, D., Nishiguchi, H., Nishimura, M., Ogawa, S., Ootani, W., Panareo, M., Papa, A., Pepino, A., Piredda, G., Pizzigoni, G., Popov, A., Renga, F., Ripiccini, E., Ritt, S., Rossella, M., Rutar, G., Sawada, R., Sergiampietri, F., Signorelli, G., Tassielli, G., Tenchini, F., Uchiyama, Y., Venturini, M., Voena, C., Yamamoto, A., Yoshida, K., You, Z., and Yudin, Y. V.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
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
2015
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14. Measurement of the radiative decay of polarized muons in the MEG experiment

Author

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

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

We studied the radiative muon decay $\mu^+ \to e^+\nu\bar{\nu}\gamma$ by using for the first time an almost fully polarized muon source. We identified a large sample (~13000) of these decays in a total sample of 1.8x10^14 positive muon decays collected in the MEG experiment in the years 2009--2010 and measured the branching ratio B($\mu^+ \to e^+\nu\bar{\nu}\gamma$) = (6.03+-0.14(stat.)+-0.53(sys.))x10^-8 for E_e > 45 MeV and E_{\gamma} > 40 MeV, consistent with the Standard Model prediction. The precise measurement of this decay mode provides a basic tool for the timing calibration, a normalization channel, and a strong quality check of the complete MEG experiment in the search for $\mu^+ \to e^+\gamma$ process., Comment: 8 pages, 7 figures. Added an introduction to NLO calculation which was recently calculated. Published version

Published
2013
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15. The MEG detector for ${\mu}+\to e+{\gamma}$ decay search

Author

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

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
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 \meg\ by using one of the most intense continuous $\mu^+$ 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., Comment: 59 pages, 90 figures

Published
2013
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16. New constraint on the existence of the mu+-> e+ gamma decay

Author

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

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

The analysis of a combined data set, totaling 3.6 \times 10^14 stopped muons on target, in the search for the lepton flavour violating decay mu^+ -> e^+ gamma is presented. The data collected by the MEG experiment at the Paul Scherrer Institut show no excess of events compared to background expectations and yield a new upper limit on the branching ratio of this decay of 5.7 \times 10^-13 (90% confidence level). This represents a four times more stringent limit than the previous world best limit set by MEG., Comment: 5 pages, 3 figures, a version accepted in Phys. Rev. Lett

Published
2013

17. MEG Upgrade Proposal

Author

Baldini, A. M., Cei, F., Cerri, C., Dussoni, S., Galli, L., Grassi, M., Nicolò, D., Raffaelli, F., Sergiampietri, F., Signorelli, G., Tenchini, F., Bagliani, D., De Gerone, M., Gatti, F., Baracchini, E., Fujii, Y., Iwamoto, T., Kaneko, D., Mori, T., Nishimura, M., Ootani, W., Sawada, R., Uchiyama, Y., Boca, G., Cattaneo, P. W., de Bari, A., Nardò, R., Rossella, M., Cascella, M., Grancagnolo, F., L'Erario, A., Maffezzoli, A., Miccoli, A., Onorato, G., Palamà, G., Panareo, M., Pepino, A., Rella, S., Tassielli, G. F., Zavarise, G., Cavoto, G., Graziosi, A., Piredda, G., Ripiccini, E., Voena, C., Grigoriev, D. N., Ignatov, F., Khazin, B. I., Popov, A., Yudin, Yu. V., Haruyama, T., Mihara, S., Nishiguchi, H., Yamamoto, A., Hildebrandt, M., Kettle, P. -R., Papa, A., Renga, F., Ritt, S., Stoykov, A., Kang, T. I., Lim, G., Molzon, W., You, Z., Khomutov, N., Korenchenko, A., Kravchuk, N., and Kuchinksy, N.

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

We propose the continuation of the MEG experiment to search for the charged lepton flavour violating decay (cLFV) \mu \to e \gamma, based on an upgrade of the experiment, which aims for a sensitivity enhancement of one order of magnitude compared to the final MEG result, down to the $6 \times 10^{-14}$ level. The key features of this new MEG upgrade are an increased rate capability of all detectors to enable running at the intensity frontier and improved energy, angular and timing resolutions, for both the positron and photon arms of the detector. On the positron-side a new low-mass, single volume, high granularity tracker is envisaged, in combination with a new highly segmented, fast timing counter array, to track positron from a thinner stopping target. The photon-arm, with the largest liquid xenon (LXe) detector in the world, totalling 900 l, will also be improved by increasing the granularity at the incident face, by replacing the current photomultiplier tubes (PMTs) with a larger number of smaller photosensors and optimizing the photosensor layout also on the lateral faces. A new DAQ scheme involving the implementation of a new combined readout board capable of integrating the diverse functions of digitization, trigger capability and splitter functionality into one condensed unit, is also under development. We describe here the status of the MEG experiment, the scientific merits of the upgrade and the experimental methods we plan to use., Comment: A. M. Baldini and T. Mori Spokespersons. Research proposal submitted to the Paul Scherrer Institute Research Committee for Particle Physics at the Ring Cyclotron. 131 Pages

Published
2013

18. Improvement of xenon purification system using a combination of a pulse tube refrigerator and a coaxial heat exchanger

Author

Chen, Wan-Ting, Chbib, D., Cussonneau, J. -P., Donnard, J., Duval, S., Lemaire, O., Calloch, M. Le, Ray, P. Le, Mohamad-Hadi, A. -F., Morteau, E., Oger, T., Scotto-Lavina, L., Stutzmann, J. -S., Thers, D., Briend, P., Haruyama, T., Mihara, S., and Tauchi, T.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

We have developed a compact cryogenic system with a pulse tube refrigerator and a coaxial heat exchanger. This liquefaction-purification system not only saves the cooling power used to reach high gaseous recirculation rate, but also reduces the impurity level with high speed. The heat exchanger operates with an efficiency of 99%, which indicates the possibility for fast xenon gas recirculation in a highpressurized large-scale xenon storage with much less thermal losses.

Published
2012

19. Magnetic Field Measurement of Superconducting Transport Solenoid for COMET

Author

Arimoto, Y., Aoki, K., Ohuchi, N., Sumi, N., Yoshida, M., Sasaki, K., Iio, M., Makida, Y., and Mihara, S.

Abstract

The COMET experiment, currently under construction at J-PARC, aims to explore the process of muon-to-electron conversion in a nucleus. This phenomenon, known as charged-lepton flavor violation, is an elementary process beyond the Standard Model. The muon beam is produced from pion decays generated by bombarding a proton beam on a target and corrected and transported from the production target to a stopping target in a detector with superconducting solenoid magnets. Their momentum is selected by a curved solenoid field (3 T) and dipole field (0.05 T) in the Muon Transport Solenoid (MTS), which has a diameter of 468 mm and a curvature radius of 3 m with a bending angle of 90 degrees. We energized the solenoid up to 105 A and the dipole to $\pm$175 A in the summer of 2022. Although the solenoid was operated at a half of its design value (210 A) due to the limitation of the support structure, this commissioning provided a sufficient current for the subsequent engineering beam operation (Phase-$\alpha$) to be conducted successfully. We performed in-situ magnetic measurements of the curved solenoid with Hall probes and compared them to 3D calculations. The paper describes the scheme and results of the magnetic filed measurement in MTS.

Published
2024
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20. New limit on the lepton-flavour violating decay mu -> e gamma

Author

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

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
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 flavour violating decay mu->e gamma. The likelihood analysis of the combined data sample, which corresponds to a total of 1.8 x 10**14 muon decays, gives a 90% C.L. upper limit of 2.4 x 10**-12 on the branching ratio of the mu->e gamma decay, constituting the most stringent limit on the existence of this decay to date., Comment: 5 pages, 2 figures, accepted for publication at Phys. Rev. Lett

Published
2011
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21. A limit for the mu -> e gamma decay from the MEG experiment

Author

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

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

A search for the decay mu -> e gamma, 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(mu -> e gamma) < 2.8 x 10**-11 (90% C.L.). This corresponds to the measurement of positrons and photons from ~ 10**14 stopped mu-decays by means of a superconducting positron spectrometer and a 900 litre liquid xenon photon detector., Comment: 13 pages, 9 figures. v2: improved estimate of photon reconstruction efficiency

Published
2009
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22. The H$\alpha$ Luminosity Function and Star Formation Rate at $z \approx 0.24$ in the Cosmos 2 Square-Degree Field

Author

Shioya, Y., Taniguchi, Y., Sasaki, S. S., Nagao, T., Murayama, T., Takahashi, M. I., Ajiki, M., Ideue, Y., Mihara, S., Nakajima, A., Scoville, N. Z., Mobasher, B., Aussel, H., Giavalisco, M., Guzzo, L., Hasinger, G., Impey, C., LeFevre, O., Lilly, S., Renzini, A., Rich, M., Sanders, D. B., Schinnerer, E., Shopbell, P., Leauthaud, A., Kneib, J. -P., Rhodes, J., and Massey, R.

Subjects
Astrophysics
Abstract

To derive a new H$\alpha$ luminosity function and to understand the clustering properties of star-forming galaxies at $z \approx 0.24$, we have made a narrow-band imaging survey for H$\alpha$ emitting galaxies in the HST COSMOS 2 square degree field. We used the narrow-band filter NB816 ($\lambda_c = 8150$ \AA, $\Delta \lambda = 120$ \AA) and sampled H$\alpha$ emitters with $EW_{\rm obs}(\rm H\alpha + [N\textsc{ii}]) > 12$ \AA in a redshift range between $z=0.233$ and $z=0.251$ corresponding to a depth of 70 Mpc. We obtained 980 H$\alpha$ emitting galaxies in a sky area of 5540 arcmin$^2$, corresponding to a survey volume of $3.1 \times 10^4 {\rm Mpc^3}$. We derive a H$\alpha$ luminosity function with a best-fit Schechter function parameter set of $\alpha = -1.35^{+0.11}_{-0.13}$, $\log\phi_* = -2.65^{+0.27}_{-0.38}$, and $\log L_* ({\rm erg s^{-1}}) = 41.94^{+0.38}_{-0.23}$. The H$\alpha$ luminosity density is $2.7^{+0.7}_{-0.6} \times 10^{39}$ ergs s$^{-1}$ Mpc$^{-3}$. After subtracting the AGN contribution (15 %) to the H$\alpha$ luminosity density, the star formation rate density is evaluated as $1.8^{+0.7}_{-0.4} \times 10^{-2}$ $M_{\sun}$ yr$^{-1}$ Mpc$^{-3}$. The angular two-point correlation function of H$\alpha$ emitting galaxies of $\log L({\rm H\alpha}) > 39.8$ is well fit by a power law form of $w(\theta) = 0.013^{+0.002}_{-0.001} \theta^{-0.88 \pm 0.03}$, corresponding to the correlation function of $\xi(r) = (r/1.9{\rm Mpc})^{-1.88}$. We also find that the H$\alpha$ emitters with higher H$\alpha$ luminosity are more strongly clustered than those with lower luminosity., Comment: 13 pages, 9 fifgure, to apper in ApJS

Published
2007
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23. The [OII]3727 Luminosity function and Star Formation Rate at z~1.2 in the COSMOS 2 Square-degree Field and the Subaru Deep Field

Author

Takahashi, M. I., Shioya, Y., Taniguchi, Y., Murayama, T., Ajiki, M., Sasaki, S. S., Koizumi, O., Nagao, T., Scoville, N. Z., Mobasher, B., Aussel, H., Capak, P., Carilli, C., Ellis, R. S., Garilli, B., Giavalisco, M., Guzzo, L., Hasinger, G., Impey, C., Kitzbichler, M. G., Koekemoer, A., Fevre, O. Le, Lilly, S. J., Maccagni, D., Renzini, A., Rich, M., Sanders, D. B., Schinnerer, E., Scodeggio, M., Shopbell, P., Smolcic, V., Tribiano, S., Ideue, Y., and Mihara, S.

Subjects
Astrophysics
Abstract

We have carried out a wide-field imaging survey for [OII]3727 emitting galaxies at z~1.2 in the HST COSMOS 2 square degree field using the Suprime-Cam on the Subaru Telescope. The survey covers a sky area of 6700 arcmin^2 in the COSMOS field, and a redshift range between 1.17 and 1.20 (Delta_z = 0.03), corresponding to a survey volume of 5.56*10^5 Mpc^3. We obtain a sample of 3176 [OII] emitting galaxies with observed emission-line equivalent widths greater than 26 AA. Since our survey tends to sample brighter [OII]3727 emitting galaxies, we also analyze a sample of fainter [OII]3727 emitting galaxies found in the Subaru Deep Field (SDF). We find an extinction-corrected [OII] luminosity density of 10^{40.35^+0.08_-0.06} ergs s^-1 Mpc-3, corresponding to star formation rate density of 0.32^+0.06_-0.04 M_sun yr-1 Mpc^-3 in the COSMOS field at z~1.2. This is the largest survey for [OII]3727 emitters beyond z=1 currently available., Comment: 33 pages, 9 figures. to appear in the ApJ Supplement COSMOS Special Issue

Published
2007
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24. Nuclear-matter modification of decay widths in the $\phi \to e^{+}e^{-}$ and $\phi \to K^{+}K^{-}$ channels

Author

Sakuma, F., Chiba, J., En'yo, H., Fukao, Y., Funahashi, H., Hamagaki, H., Ieiri, M., Ishino, M., Kanda, H., Kitaguchi, M., Mihara, S., Miwa, K., Miyashita, T., Murakami, T., Muto, R., Nakura, T., Naruki, M., Ozawa, K., Sasaki, O., Sekimoto, M., Tabaru, T., Tanaka, K. H., Togawa, M., Yamada, S., Yokkaichi, S., and Yoshimura, Y.

Subjects
Nuclear Experiment
Abstract

The invariant mass spectra of $\phi \to K^{+}K^{-}$ are measured in 12 GeV $p+A$ reactions in order to search for the in-medium modification of $\phi$ mesons. The observed $K^{+}K^{-}$ spectra are well reproduced by the relativistic Breit-Wigner function with a combinatorial background shape in three $\beta\gamma$ regions between 1.0 and 3.5. The nuclear mass-number dependence of the yields of the $K^{+}K^{-}$ decay channel is compared to the simultaneously measured $e^{+}e^{-}$ decay channel for carbon and copper targets. We parameterize the production yields as $\sigma (A) = \sigma_0 \times A^\alpha$ and obtain $\alpha_{\phi\to K^+K^-} - \alpha_{\phi\to e^+e^-}$ to be 0.14 $\pm$ 0.12. Limits are obtained for the partial decay widths of $\phi$ mesons in nuclear matter., Comment: 5 pages, 4 figures

Published
2006
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25. Nuclear mass number dependence of inclusive production of omega and phi mesons in 12 GeV p + A collisions

Author

Tabaru, T., En'yo, H., Muto, R., Naruki, M., Yokkaichi, S., Chiba, J., Ieiri, M., Sasaki, O., Sekimoto, M., Tanaka, K. H., Funahashi, H., Fukao, Y., Kitaguchi, M., Ishino, M., Kanda, H., Mihara, S., Miyashita, T., Miwa, K., Murakami, T., Nakura, T., Sakuma, F., Togawa, M., Yamada, S., Yoshimura, Y., Hamagaki, H., and Ozawa, K.

Subjects
Nuclear Experiment
Abstract

The inclusive production of omega and phi mesons is studied in the backward region of the interaction of 12 GeV protons with polyethylene, carbon, and copper targets. The mesons are measured in e^+ e^- decay channels. The production cross sections of the mesons are presented as functions of rapidity y and transverse momentum p_T. The nuclear mass number dependences (A dependences) are found to be A^{0.710 +/- 0.021(stat) +/- 0.037(syst)} for omega mesons and A^{0.937 +/- 0.049(stat) +/- 0.018(syst)} for phi mesons in the region of 0.9 < y < 1.7 and p_T < 0.75 GeV/c., Comment: 12 pages, 8 figures; typos added

Published
2006
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26. Evidence for in-medium modification of the $\phi$ meson at normal nuclear density

Author

Muto, R., En'yo, H., Naruki, M., Tabaru, T., Yokkaichi, S., Chiba, J., Ieiri, M., Sasaki, O., Sekimoto, M., Tanaka, K. H., Funahashi, H., Fukao, Y., Kitaguchi, M., Ishino, M., Kanda, H., Mihara, S., Miyashita, T., Miwa, K., Murakami, T., Nakura, T., Sakuma, F., Togawa, M., Yamada, S., Yoshimura, Y., Hamagaki, H., and Ozawa, K.

Subjects
Nuclear Experiment
Abstract

Invariant mass spectra of e+e- pairs have been measured in 12 GeV p+A reactions to detect possible in-medium modification of vector mesons. Copper and carbon targets are used to study the nuclear-size dependence of e+e- invariant mass distributions. A significant excess on the low-mass side of the phi meson peak is observed in the low beta gamma (=beta/sqrt(1-beta^2)) region of phi mesons (beta gamma < 1.25) with copper targets. However, in the high beta gamma region (beta gamma > 1.25), spectral shapes of phi mesons are well described by the Breit-Wigner shape when experimental effects are considered. Thus, in addition to our earlier publication on rho / omega modification, this study has experimentally verified vector meson mass modification at normal nuclear density., Comment: 4 pages, 4 figures

Published
2005
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27. Experimental Signature of Medium Modifications for rho and omega Mesons in the 12 GeV p + A Reactions

Author

Naruki, M., Funahashi, H., Fukao, Y., Kitaguchi, M., Ishino, M., Kanda, H., Mihara, S., Miyashita, T., Miwa, K., Murakami, T., Nakura, T., Sakuma, F., Togawa, M., Yamada, S., Yoshimura, Y., En'yo, H., Muto, R., Tabaru, T., Yokkaichi, S., Chiba, J., Ieiri, M., Sasaki, O., Sekimoto, M., Tanaka, K. H., Ozawa, K., and Hamagaki, H.

Subjects
Nuclear Experiment
Abstract

The invariant mass spectra of e+e- pairs produced in 12-GeV proton-induced nuclear reactions are measured at the KEK Proton-Synchrotron. On the low-mass side of the omega meson peak, a significant enhancement over the known hadronic sources has been observed. The mass spectra, including the excess, are well reproduced by a model that takes into account the density dependence of the vector meson mass modification, as theoretically predicted., Comment: 4 pages, 3 figures, Version accepted for Physical Review Letter

Published
2005
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28. Measurement of the Xi-p Scattering Cross Sections at Low Energy

Author

Ahn, J. K., Aoki, S., Chung, K. S., Chung, M. S., Enyo, H., Fukuda, T., Funahashi, H., Goto, Y., Higashi, A., Ieiri, M., Iijima, T., Iinuma, M., Imai, K., Itow, Y., Lee, J. M., Makino, S., Masaike, A., Matsuda, Y., Matsuyama, Y., Mihara, S., Nagoshi, C., Nomura, I., Park, I. S., Saito, N., Sekimoto, M., Shin, Y. M., Sim, K. S., Susukita, R., Takashima, R., Takeutchi, F., Tlusty, P., Weibe, S., Yakkaichi, S., Yoshida, K., Yoshida, M., Yoshida, T., and Yamashita, S.

Subjects
Nuclear Experiment
Abstract

In this paper we report cross-section measurements for $\Xi^-p$ elastic and inelastic scatterings at low energy using a scintillating fiber active target. Upper limit on the total cross-section for the elastic scattering was found to be 24 mb at 90% confidence level, and the total cross section for the $\Xi^-p\to\Lambda\Lambda$ reaction was found to be $4.3^{+6.3}_{-2.7}$ mb. We compare the results with currently competing theoretical estimates., Comment: 9 pages

Published
2005
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29. Absorption of Scintillation Light in a 100 $\ell$ Liquid Xenon$\gamma$ Ray Detector and Expected Detector Performance

Author

Baldini, A., Bemporad, C., Cei, F., Doke, T., Grassi, M., Grebenuk, A. A., Grigoriev, D. N., Haruyama, T., Kasami, K., Kikuchi, J., Maki, A., Mashimo, T., Mihara, S., Mitsuhashi, T., Mori, T., Nicolo`, D., Nishiguchi, H., Ootani, W., Ozone, K., Papa, A., Pazzi, R., Ritt, S., Sawada, R., Sergiampietri, F., Signorelli, G., Suzuki, S., Terasawa, K., Yamashita, M., Yamashita, S., Yoshimura, T., and Yuri, Yu.

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

An 800L liquid xenon scintillation $\gamma$ ray detector is being developed for the MEG experiment which will search for $\mu^+\to\mathrm{e}^+\gamma$ decay at the Paul Scherrer Institut. Absorption of scintillation light of xenon by impurities might possibly limit the performance of such a detector. We used a 100L prototype with an active volume of 372x372x496 mm$^3$ to study the scintillation light absorption. We have developed a method to evaluate the light absorption, separately from elastic scattering of light, by measuring cosmic rays and $\alpha$ sources. By using a suitable purification technique, an absorption length longer than 100 cm has been achieved. The effects of the light absorption on the energy resolution are estimated by Monte Carlo simulation., Comment: 18 pages, 10 figures (eps). Submitted to Nucl. Instr. and Meth. A

Published
2004
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30. Liquid Xe scintillation calorimetry and Xe optical properties

Author

Baldini, A., Bemporad, C., Cei, F., Doke, T., Grassi, M., Haruyama, T., Mihara, S., Mori, T., Nicolò, D., Nishiguchi, H., Ootani, W., Ozone, K., Papa, A., Pazzi, R., Sawada, R., Sergiampietri, F., Signorelli, G., Suzuki, S., and Terasawa, K.

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

The optical properties of LXe in the vacuum ultra violet (VUV), determining the performance of a scintillation calorimeter, are discussed in detail. The available data, measured in a wider spectral region from visible to UV light, and in a large range of Xe densities, from gas to liquid, are examined. It is shown that this information can be used for deriving the LXe optical properties in the VUV. A comparison is made with the few direct measurements in LXe for VUV light resulting from the LXe excitation by ionizing particles. A useful relation is obtained which connects the Rayleigh scattering length to the refractive index in LXe., Comment: 20 pages, 12 figures

Published
2004
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31. Observation of $\rho / \omega$ Meson Modification in Nuclear Matter

Author

Ozawa, K., En'yo, H., Funahashi, H., Kitaguchi, M., Ishino, M., Kanda, H., Mihara, S., Miyashita, T., Murakami, T., Muto, R., Naruki, M., Sakuma, F., Sato, H. D., Tabaru, T., Yamada, S., Yokkaichi, S., Yoshimura, Y., Chiba, J., Ieiri, M., Nomachi, M., Sasaki, O., Sekimoto, M., Tanaka, K. H., and Hamagaki, H.

Subjects
Nuclear Experiment
Abstract

We have measured invariant mass spectra of electron-positron pairs in the target rapidity region of 12GeV p+A reactions. We have observed a significant difference in the mass spectra below the $\omega$ meson between p+C and p+Cu interactions. The difference is interpreted as a signature of the $\rho/\omega$ modification at normal nuclear-matter density., Comment: 8 pages, 3 figures, submitted to Phys. Rev. Letters. all the figures changed to Postscript format, text not changed

Published
2000
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32. Search for the lepton flavour violating decay μ + → e + γ with the full dataset of the MEG experiment: MEG Collaboration

Author

Baldini, A. M., Bao, Y., Baracchini, E., Bemporad, C., Berg, F., Biasotti, M., Boca, G., Cascella, M., Cattaneo, P. W., Cavoto, G., Cei, F., Cerri, C., Chiarello, G., Chiri, C., Corvaglia, A., de Bari, A., De Gerone, M., Doke, T., D’Onofrio, A., Dussoni, S., Egger, J., Fujii, Y., Galli, L., Gatti, F., Grancagnolo, F., Grassi, M., Graziosi, A., Grigoriev, D. N., Haruyama, T., Hildebrandt, M., Hodge, Z., Ieki, K., Ignatov, F., Iwamoto, T., Kaneko, D., Kang, T. I., Kettle, P.-R., Khazin, B. I., Khomutov, N., Korenchenko, A., Kravchuk, N., Lim, G. M. A., Maki, A., Mihara, S., Molzon, W., Mori, Toshinori, Morsani, F., Mtchedilishvili, A., Mzavia, D., Nakaura, S., Nardò, R., Nicolò, D., Nishiguchi, H., Nishimura, M., Ogawa, S., Ootani, W., Orito, S., Panareo, M., Papa, A., Pazzi, R., Pepino, A., Piredda, G., Pizzigoni, G., Popov, A., Raffaelli, F., Renga, F., Ripiccini, E., Ritt, S., Rossella, M., Rutar, G., Sawada, R., Sergiampietri, F., Signorelli, G., Simonetta, M., Tassielli, G. F., Tenchini, F., Uchiyama, Y., Venturini, M., Voena, C., Yamamoto, A., Yoshida, K., You, Z., Yudin, Yu. V., and Zanello, D.

Published
2016
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33. Muon polarization in the MEG experiment: predictions and measurements: The MEG Collaboration

Author

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

Published
2016
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34. Measurement of the radiative decay of polarized muons in the MEG experiment

Author

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

Published
2016
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35. PIONEER: Studies of Rare Pion Decays

Author

Altmannshofer, W., Gori, S., Godoy, M., Grillo, A., Mazza, S., Ott, J., Schumm, B., Seiden, A., Tarka, M., Binney, H., Garcia, A., Hertzog, D., Hodge, Z., Kammel, P., LaBounty, J., Roehnelt, R., Blucher, E., Bryman, D., Chen, S., Cirigliano, V., Corrodi, S., Hernandez, C. Ortega, Cuen-Rochin, S., Czarnecki, A., DiCanto, A., Jaffe, D., Kettel, S., Tischenko, V., Tricoli, A., Worcester, E., Doria, L., Gorchtein, M., Ries, D., Gaponenko, A., Kiburg, B., Mott, J., Polly, C., Gibbons, L., Labe, K., Glaser, C., Počanić, D., Gorringe, T., Hoferichter, M., Ito, S., Mihara, S., Iwamoto, T., Mori, T., Ootani, W., Wataru, T., Langenegger, U., Schwendimann, P., Malbrunot, C., Mischke, R., Numao, T., Pachal, K., Sher, A., Velghe, B., Wong, V., Soter, A., Shrock, R., and Sullivan, T.

Subjects
Physics - Instrumentation and Detectors, hep-ex, FOS: Physical sciences, hep-ph, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), High Energy Physics::Experiment, Detectors and Experimental Techniques, physics.ins-det, Particle Physics - Experiment, Particle Physics - Phenomenology
Abstract

A next-generation rare pion decay experiment, PIONEER, is strongly motivated by several inconsistencies between Standard Model (SM) predictions and data pointing towards the potential violation of lepton flavor universality. It will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles even if their masses are at very high scales. Measurement of the charged-pion branching ratio to electrons vs. muons $R_{e/\mu}$ is extremely sensitive to new physics effects. At present, the SM prediction for $R_{e/\mu}$ is known to 1 part in $10^4$, which is 15 times more precise than the current experimental result. An experiment reaching the theoretical accuracy will test lepton flavor universality at an unprecedented level, probing mass scales up to the PeV range. Measurement of pion beta decay, $\pi^+\to \pi^0 e^+ \nu (\gamma)$, with 3 to 10-fold improvement in sensitivity, will determine $V_{ud}$ in a theoretically pristine manner and test CKM unitarity, which is very important in light of the recently emerged tensions. In addition, various exotic rare decays involving sterile neutrinos and axions will be searched for with unprecedented sensitivity. The experiment design benefits from experience with the recent PIENU and PEN experiments at TRIUMF and the Paul Scherrer Institut (PSI). Excellent energy and time resolutions, greatly increased calorimeter depth, high-speed detector and electronics response, large solid angle coverage, and complete event reconstruction are all critical aspects of the approach. The PIONEER experiment design includes a 3$\pi$ sr 25 radiation length calorimeter, a segmented low gain avalanche detector stopping target, a positron tracker, and other detectors. Using intense pion beams, and state-of-the-art instrumentation and computational resources, the experiments can be performed at the PSI ring cyclotron.

Published
2022

36. Determination of the production rate of D*0 mesons and of the ratio V/(V+P) in \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $$Z^0 \to c\bar c$$ \end{document} decays

Author

Ackerstaff, K., Alexander, G., Allison, J., Altekamp, N., Anderson, K. J., Anderson, S., Arcelli, S., Asai, S., Ashby, S. F., Axen, D., Azuelos, G., Ball, A. H., Barberio, E., Barlow, R. J., Bartoldus, R., Batley, J. R., Baumann, S., Bechtluft, J., Behnke, T., Bell, K. W., Bella, G., Bentvelsen, S., Bethke, S., Betts, S., Biebel, O., Biguzzi, A., Bird, S. D., Blobel, V., Bloodworth, I. J., Bobinski, M., Bock, P., Bonacorsi, D., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, R. M., Burckhart, H. J., Burgard, C., Bürgin, R., Capiluppi, P., Carnegie, R. K., Carter, A. A., R.Carter, J., Chang, C. Y., Charlton, D. G., Chrisman, D., Clarke, P. E. L., Cohen, I., Conboy, J. E., Cooke, O. C., Couyoumtzelis, C., Coxe, R. L., Cuffiani, M., Dado, S., Dallapiccola, C., Dallavalle, G. M., Davis, R., Jong, S. De, del Pozo, L. A., de Roeck, A., Desch, K., Dienes, B., Dixit, M. S., Doucet, M., Duchovni, E., Duckeck, G., Duerdoth, I. P., Eatough, D., Estabrooks, P. G., Etzion, E., Evans, H. G., Evans, M., Fabbri, F., Fanfani, A., Fanti, M., Faust, A. A., Feld, L., Fiedler, F., Fierro, M., Fischer, H. M., Fleck, I., Folman, R., Fong, D. G., Foucher, M., Fürtjes, A., Futyan, D. I., Gagnon, P., Gary, J. W., Gascon, J., Gascon-Shotkin, S. M., Geddes, N. I., Geich-Gimbel, C., Geralis, T., Giacomelli, G., Giacomelli, P., Giacomelli, R., Gibson, V., Gibson, W. R., Gingrich, D. M., Glenzinski, D., Goldberg, J., Goodrick, M. J., Gorn, W., Grandi, C., Gross, E., Grunhaus, J., Gruwé, M., Hajdu, C., Hanson, G. G., Hansroul, M., Hapke, M., Hargrove, C. K., Hart, P. A., Hartmann, C., Hauschild, M., Hawkes, C. M., Hawkings, R., Hemingway, R. J., Herndon, M., Herten, G., Heuer, R. D., Hildreth, M. D., Hill, J. C., Hillier, S. J., Hobson, P. R., Hocker, A., Homer, R. J., Honma, A. K., Horvath, D., Hossain, K. R., Howard, R., Hüntemeyer, P., Hutchcroft, D. E., Igo-Kemenes, P., Imrie, D. C., Ishii, K., Jawahery, A., Jeffreys, P. W., Jeremie, H., Jimack, M., Joly, A., Jones, C. R., Jones, M., Jost, U., Jovanovic, P., Junk, T. R., Kanzaki, J., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Kayal, P. I., Keeler, R. K., Kellogg, R. G., Kennedy, B. W., Kirk, J., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Koetke, D. S., Kokott, T. P., Kolrep, M., Komamiya, S., Kowalewski, R. V., Kress, T., Krieger, P., von Krogh, J., Kyberd, P., Lafferty, G. D., Lahmann, R., Lai, W. P., Lanske, D., Lauber, J., Lautenschlager, S. R., Lawson, I., Layter, J. G., Lazic, D., Lee, A. M., Lefebvre, E., Lellouch, D., Letts, J., Levinson, L., List, B., Lloyd, S. L., Loebinger, F. K., Long, G. D., Losty, M. J., Ludwig, J., Lui, D., Macchiolo, A., Macpherson, A., Mannelli, M., Marcellini, S., Markopoulos, C., Markus, C., Martin, A. J., Martin, J. P., Martinez, G., Mashimo, T., Mättig, P., McDonald, W. J., McKenna, J., Mckigney, E. A., McMahon, T. J., McPherson, R. A., Meijers, F., Menke, S., Merritt, F. S., Mes, H., Meyer, J., Michelini, A., Mihara, S., Mikenberg, G., Miller, D. J., Mincer, A., Mir, R., Mohr, W., Montanari, A., Mori, T., Mihara, S., Nagai, K., Nakamura, I., Neal, H. A., Nellen, B., Nisius, R., O’Neale, S. W., Oakham, F. G., Odorici, F., Ogren, H. O., Oh, A., Oldershaw, N. J., Oreglia, M. J., Orito, S., Pálinkás, J., Pásztor, G., Pater, J. R., Patrick, G. N., Patt, J., Perez-Ochoa, R., Petzold, S., Pfeifenschneider, P., Pilcher, J. E., Pinfold, J., Plane, D. E., Poffenberger, P., Poli, B., Posthaus, A., Rembser, C., Robertson, S., Robins, S. A., Rodning, N., Roney, J. M., Rooke, A., Rossi, A. M., Routenburg, P., Rozen, Y., Runge, K., Runolfsson, O., Ruppel, U., Rust, D. R., Sachs, K., Saeki, T., Sahr, O., Sang, W. M., Sarkisyan, E. K. G., Sbarra, C., Schaile, A. D., Schaile, O., Scharf, F., Scharff-Hansen, P., Schieck, J., Schleper, P., Schmitt, B., Schmitt, S., Schöming, A., Schröder, M., Schumacher, M., Schwick, C., Scott, W. G., Shears, T. G., Shen, B. C., Shepherd-Themistocleous, C. H., Sherwood, P., Siroli, G. P., Sittler, A., Skillman, A., Skuja, A., Smith, A. M., Snow, G. A., Sobie, R., Söldner-Rembold, S., Springer, R. W., Sproston, M., Stephens, K., Steuerer, J., Stockhausen, B., Stoll, K., Strom, D., Ströhmer, R., Szymanski, P., Tafirout, R., Talbot, S. D., Taras, P., Tarem, S., Teuscher, R., Thiergen, M., Thomson, M. A., von Törne, E., Torrence, E., Towers, S., Trigger, I., Trócsányi, Z., Tsur, E., Turcot, A. S., Turner-Watson, M. F., Ueda, I., Utzat, P., Van Kooten, R., Vannerem, P., Verzocchi, M., Vikas, P., Vokurka, E. H., Voss, H., Wäckerle, F., Wagner, A., Ward, C. P., Ward, D. R., Watkins, P. M., Watson, A. T., Watson, N. K., Wells, P. S., Wermes, N., White, J. S., Wilson, G. W., Wilson, J. A., Wyatt, T. R., Yamashita, S., Yekutieli, G., Zacek, V., and Zer-Zion, D.

Published
1998
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37. A search for neutral Higgs bosons in the MSSM and models with two scalar field doublets

Author

Ackerstaff, K., Alexander, G., Allison, J., Altekamp, N., Anderson, K. J., Anderson, S., Arcelli, S., Asai, S., Ashby, S. F., Axen, D., Azuelos, G., Ball, A. H., Barberio, E., Barlow, R. J., Bartoldus, R., Batley, J. R., Baumann, S., Bechtluft, J., Behnke, T., Bell, K. W., Bella, G., Bentvelsen, S., Bethke, S., Betts, S., Biebel, O., Biguzzi, A., Bird, S. D., Blobel, V., Bloodworth, I. J., Bobinski, M., Bock, P., Bonacorsi, D., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, R. M., Burckhart, H. J., Burgard, C., Bürgin, R., Capiluppi, P., Carnegie, R. K., Carter, A. A., Carter, J. R., Chang, C. Y., Charlton, D. G., Chrisman, D., Clarke, P. E. L., Cohen, I., Conboy, J. E., Cooke, O. C., Couyoumtzelis, C., Coxe, R. L., Cuffiani, M., Dado, S., Dallapiccola, C., Dallavalle, G. M., Davis, R., de Jong, S., del Pozo, L. A., de Roeck, A., Desch, K., Dienes, B., Dixit, M. S., Doucet, M., Dnchovni, E., Duckeck, G., Duerdoth, I. P., Eatough, D., Estabrooks, P. G., Etzion, E., Evans, H. G., Evans, M., Fabbri, F., Fanfani, A., Fanti, M., Faust, A. A., Feld, L., Fiedler, F., Fierro, M., Fischer, H. M., Fleck, I., Folman, R., Fong, D. G., Foucher, M., Fiirtjes, A., Futyan, D. I., Gagnon, P., Gary, J. W., Gascon, J., Gascon-Shotkin, S. M., Geddes, N. I., Geich-Gimbel, C., Geralis, T., Giacomelli, G., Giacomelli, P., Giacomelli, R., Gibson, V., Gibson, W. R., Gingrich, D. M., Glenzinski, D., Goldberg, J., Goodrick, M. J., Gorn, W., Grandi, C., Gross, E., Grunhaus, J., Gruwé, M., Hajdu, C., Hanson, G. G., Hansroul, M., Hapke, M., Hargrove, C. K., Hart, P. A., Hartmann, C., Hauschild, M., Hawkes, C M., Hawkings, R., Hemingway, R. J., Hcrndon, M., Herten, G., Heuer, R. D., Hildreth, M. D., Hill, J. C., Hillier, S. J., Hobson, P. R., Hocker, A., Homer, R. J., Honma, A. K., Horvath, D., Hossain, K. R., Howard, R., Hüntemeyer, P., Hutchcroft, D. E., Igo-Kemenes, P., Imrie, D. C., Ishii, K., Jawahery, A., Jeffreys, P. W., Jeremie, H., Jimack, M., Joly, A., Jones, C. R., Jones, M., Jost, U., Jovanovic, P., Junk, T. R., Kanzaki, J., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Kayal, P. I., Keeler, R. K., Kellogg, R. G., Kennedy, B. W., Kirk, J., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Koetke, D. S., Kokott, T. P., Kolrep, M., Komamiya, S., Kowalewski, R. V., Kress, T., Krieger, P., von Krogh, J., Kyberd, P., Lafferty, G. D., Lahmann, R., Lai, W. P., Lanske, D., Lauber, J., Lautenschlager, S. R., Lawson, I., Layter, J. G., Lazic, D., Lee, A. M., Lefebvre, E., Lellouch, D., Letts, J., Levinson, L., List, B., Lloyd, S. L., Loebinger, F. K., Long, G. D., Losty, M. J., Ludwig, J., Lui, D., Maechiolo, A., Macpherson, A., Mannelli, M., Marcellini, S., Markopoulos, C., Markus, C., Martin, A. J., Martin, J. P., Martinez, G., Mashimo, T., Mättig, P., McDonald, W. J., McKenna, J., Mckigney, E. A., McMahon, T. J., McPherson, R. A., Meijers, F., Menke, S., Merritt, F. S., Mes, H., Meyer, J., Michelini, A., Mihara, S., Mikenberg, G., Miller, D. J., Mincer, A., Mir, R., Mohr, W., Montanari, A., Mori, T., Mihara, S., Nagai, K., Nakaumra, I., Neal, H. A., Nellen, B., Nisius, R., O’Neale, S. W., Oakham, F. G., Odorici, F., Ogren, H. O., Oh, A., Oldershaw, N. J., Oreglia, M. J., Orito, S., Pálinkás, J., Pásztor, G., Pater, J. R., Patrick, G. N., Patt, J., Perez-Ochoa, R., Petzold, S., Pfeifenschneider, P., Pilcher, J. E., Pinfold, J., Plane, D. E., Poffenberger, P., Poli, B., Posthaus, A., Rembser, C., Robertson, S., Robins, S. A., Rodning, N., Roney, J. M., Rooke, A., Rossi, A. M., Routenburg, P., Rozen, Y., Runge, K., Runolfsson, O., Ruppel, U., Rust, D. R., Sachs, K., Saeki, T., Sahr, O., M. Sang, W., Sarkisyan, E. K. G., Sbarra, C., Schalle, A. D., Schaile, O., Scharf, F., Scharff-Hansen, P., Schieck, J., Schleper, P., Schmitt, B., Schmitt, S., Schöning, A., Schröder, M., Schumacher, M., Schwick, C., Scott, W. G., Shears, T. G., Shen, B. C., Shepherd-Themistocleous, C. H., Sherwood, P., Siroli, G. P., Sittler, A., Skillman, A., Skuja, A., Smith, A. M., Snow, G. A., Sobie, R., Söldner-Rembold, S., Springer, R. W., Sproston, M., Stephens, K., Steuerer, J., Stockhausen, B., Stoll, K., Strom, D., Ströhmer, R., Szymanski, P., Tafirout, R., Talbot, S. D., Taras, P., Tarera, S., Teuscher, R., Thiergen, M., Thomson, M. A., von Törne, E., Torrence, E., Towers, S., Trigger, I., Trocsányi, Z., Tsur, E., Turcot, A. S., Turner-Watson, M. F., Ueda, I., Utzat, P., Van Koten, R., Vannerem, P., Verzocchi, M., Vikas, P., Vokurka, E. H., Voss, H., Wäckerle, F., Wagner, A., Ward, C. P., Ward, D. R., Watkins, P. M., Watson, A. T., Watson, N. K., Wells, P. S., Wermes, N., White, J. S., Wilson, G. W., Wilson, J. A., Wyatt, T. R., Yamashita, S., Yekutieli, G., Zacek, V., and Zer-Zion, D.

Published
1998
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38. Determination of α S using OPAL hadronic event shapes at $\sqrt{s} = 91\mbox{--}209~\mathrm{GeV}$ and resummed NNLO calculations

Author

Abbiendi, G., Ainsley, C., Åkesson, P. F., Alexander, G., Anagnostou, G., Anderson, K. J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R. J., Batley, R. J., Bechtle, P., Behnke, T., Bell, K. W., Bell, P. J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, R. M., Burckhart, H. J., Campana, S., Capiluppi, P., Carnegie, R. K., Carter, A. A., Carter, J. R., Chang, C. Y., Charlton, D. G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, M., De Roeck, A., De Wolf, E. A., Desch, K., Dienes, B., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I. P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J. W., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwé, M., Gupta, A., Hajdu, C., Hamann, M., Hanson, G. G., Harel, A., Hauschild, M., Hawkes, C. M., Hawkings, R., Herten, G., Heuer, R. D., Hill, J. C., Horváth, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T. R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R. K., Kellogg, R. G., Kennedy, B. W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Krämer, T., Krasznahorkay, Jr., A., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G. D., Landsman, H., Lanske, D., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S. L., Loebinger, F. K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A. J., Mashimo, T., Mättig, P., McKenna, J., McPherson, R. A., Meijers, F., Menges, W., Merritt, F. S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D. J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H. A., O’Neale, S. W., Oh, A., Oreglia, M. J., Orito, S., Pahl, C., Pásztor, G., Pater, J. R., Pilcher, J. E., Pinfold, J., Plane, D. E., Pooth, O., Przybycień, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J. M., Rossi, A. M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E. K. G., Schaile, A. D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schörner-Sadenius, T., Schröder, M., Schumacher, M., Seuster, R., Shears, T. G., Shen, B. C., Sherwood, P., Skuja, A., Smith, A. M., Sobie, R., Söldner-Rembold, S., Spano, F., Stahl, A., Strom, D., Ströhmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M. A., Torrence, E., Toya, D., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M. F., Ueda, I., Ujvári, B., Vollmer, C. F., Vannerem, P., Vértesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C. P., Ward, D. R., Watkins, P. M., Watson, A. T., Watson, N. K., Wells, P. S., Wengler, T., Wermes, N., Wilson, G. W., Wilson, J. A., Wolf, G., Wyatt, T. R., Yamashita, S., Zer-Zion, D., Zivkovic, L., and The OPAL Collaboration

Published
2011
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41. Σ−-antihyperon correlations in Z0 decay and investigation of the baryon production mechanism

Author

Abbiendi, G., Ainsley, C., Åkesson, P. F., Alexander, G., Anagnostou, G., Anderson, K. J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R. J., Batley, R. J., Bechtle, P., Behnke, T., Bell, K. W., Bell, P. J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, R. M., Burckhart, H. J., Campana, S., Capiluppi, P., Carnegie, R. K., Carter, A. A., Carter, J. R., Chang, C. Y., Charlton, D. G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, M., De Roeck, A., De Wolf, E. A., Desch, K., Dienes, B., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I. P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J. W., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwé, M., Gupta, A., Hajdu, C., Hamann, M., Hanson, G. G., Harel, A., Hauschild, M., Hawkes, C. M., Hawkings, R., Herten, G., Heuer, R. D., Hill, J. C., Horváth, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T. R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R. K., Kellogg, R. G., Kennedy, B. W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Krämer, T., Krasznahorkay, Jr., A., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G. D., Landsman, H., Lanske, D., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S. L., Loebinger, F. K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A. J., Mashimo, T., Mättig, P., McKenna, J., McPherson, R. A., Meijers, F., Menges, W., Merritt, F. S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D. J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H. A., O’Neale, S. W., Oh, A., Oreglia, M. J., Orito, S., Pahl, C., Pásztor, G., Pater, J. R., Pilcher, J. E., Pinfold, J., Plane, D. E., Pooth, O., Przybycień, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J. M., Rossi, A. M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E. K. G., Schaile, A. D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schörner-Sadenius, T., Schröder, M., Schumacher, M., Seuster, R., Shears, T. G., Shen, B. C., Sherwood, P., Skuja, A., Smith, A. M., Sobie, R., Söldner-Rembold, S., Spano, F., Stahl, A., Strom, D., Ströhmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M. A., Torrence, E., Toya, D., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M. F., Ueda, I., Ujvári, B., Vollmer, C. F., Vannerem, P., Vértesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C. P., Ward, D. R., Watkins, P. M., Watson, A. T., Watson, N. K., Wells, P. S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G. W., Wilson, J. A., Wolf, G., Wyatt, T. R., Yamashita, S., Zer-Zion, D., Zivkovic, L., and The OPAL Collaboration

Published
2009
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42. Measurement of αs with radiative hadronic events

Author

Abbiendi, G., Ainsley, C., Åkesson, P.F., Alexander, G., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, K.W., Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, R.M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, M., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J.W., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwé, M., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Herten, G., Heuer, R.D., Hill, J.C., Horváth, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Krämer, T., Krasznahorkay Jr., A., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Mashimo, T., Mättig, P., McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., O’Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pásztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, D.E., Pooth, O., Przybycień, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schörner-Sadenius, T., Schröder, M., Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Söldner-Rembold, S., Spano, F., Stahl, A., Strom, D., Ströhmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvári, B., Vollmer, C.F., Vannerem, P., Vértesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, L., and The OPAL Collaboration

Published
2008
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43. Bose–Einstein study of position–momentum correlations of charged pions in hadronic Z0 decays

Author

Abbiendi, G., Ainsley, C., Åkesson, P.F., Alexander, G., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, K.W., Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, R.M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, G.M., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J.W., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwé, M., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Herten, G., Heuer, R.D., Hill, J.C., Horváth, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Krämer, T., Krasznahorkay Jr., A., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Mashimo, T., Mättig, P., McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., O’Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pásztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, D.E., Pooth, O., Przybycień, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schörner-Sadenius, T., Schröder, M., Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Söldner-Rembold, S., Spano, F., Stahl, A., Strom, D., Ströhmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvári, B., Vollmer, C.F., Vannerem, P., Vértesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, L., and The OPAL Collaboration

Published
2007
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44. Measurement of the e+e-→W+W- cross section and W decay branching fractions at LEP

Author

Abbiendi, G., Ainsley, C., Åkesson, P.F., Alexander, G., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, K.W., Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, R.M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, M., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J.W., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwé, M., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Herten, G., Heuer, R.D., Hill, J.C., Horváth, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Krämer, T., Krasznahorkay Jr., A., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Mashimo, T., Mättig, P., McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., O’Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pásztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, D.E., Pooth, O., Przybycień, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schörner-Sadenius, T., Schröder, M., Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Söldner-Rembold, S., Spano, F., Stahl, A., Strom, D., Ströhmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvári, B., Vollmer, C.F., Vannerem, P., Vértesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, L., and The OPAL Collaboration

Published
2007
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45. Search for invisibly decaying Higgs bosons with large decay width using the OPAL detector at LEP

Author

Abbiendi, G., Ainsley, C., Åkesson, P.F., Alexander, G., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, K.W., Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, R.M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J.W., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwé, M., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Herten, G., Heuer, R.D., Hill, J.C., Horváth, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Krämer, T., Krasznahorkay Jr., A., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Mashimo, T., Mättig, P., McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O’Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pásztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, D.E., Pooth, O., Przybycień, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schörner-Sadenius, T., Schröder, M., Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Söldner-Rembold, S., Spano, F., Stahl, A., Strom, D., Ströhmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvári, B., Vollmer, C.F., Vannerem, P., Vértesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, L., and The OPAL Collaboration

Published
2007
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46. Search for neutral MSSM Higgs bosons at LEP

Author

Schael, S., Barate, R., Brunelière, R., De Bonis, I., Decamp, D., Goy, C., Jézéquel, S., Lees, J.-P., Martin, F., Merle, E., Minard, M.-N., Pietrzyk, B., Trocmé, B., Bravo, S., Casado, M.P., Chmeissani, M., Crespo, J.M., Fernandez, E., Fernandez-Bosman, M., Garrido, L., Martinez, M., Pacheco, A., Ruiz, H., Colaleo, A., Creanza, D., De Filippis, N., de Palma, M., Iaselli, G., Maggi, G., Maggi, M., Nuzzo, S., Ranieri, A., Raso, G., Ruggieri, F., Selvaggi, G., Silvestris, L., Tempesta, P., Tricomi, A., Zito, G., Huang, X., Lin, J., Ouyang, Q., Wang, T., Xie, Y., Xu, R., Xue, S., Zhang, J., Zhang, L., Zhao, W., Abbaneo, D., Barklow, T., Buchmüller, O., Cattaneo, M., Clerbaux, B., Drevermann, H., Forty, R.W., Frank, M., Gianotti, F., Hansen, J.B., Harvey, J., Hutchcroft, D.E., Janot, P., Jost, B., Kado, M., Mato, P., Moutoussi, A., Ranjard, F., Rolandi, L., Schlatter, D., Teubert, F., Valassi, A., Videau, I., Badaud, F., Dessagne, S., Falvard, A., Fayolle, D., Gay, P., Jousset, J., Michel, B., Monteil, S., Pallin, D., Pascolo, J.M., Perret, P., Hansen, J.D., Hansen, J.R., Hansen, P.H., Kraan, A.C., Nilsson, B.S., Kyriakis, A., Markou, C., Simopoulou, E., Vayaki, A., Zachariadou, K., Blondel, A., Brient, J.-C., Machefert, F., Rougé, A., Videau, H., Ciulli, V., Focardi, E., Parrini, G., Antonelli, A., Antonelli, M., Bencivenni, G., Bossi, F., Capon, G., Cerutti, F., Chiarella, V., Mannocchi, G., Laurelli, P., Mannocchi, G., Murtas, G.P., Passalacqua, L., Kennedy, J., Lynch, J.G., Negus, P., O’Shea, V., Thompson, A.S., Wasserbaech, S., Cavanaugh, R., Dhamotharan, S., Geweniger, C., Hanke, P., Hepp, V., Kluge, E.E., Putzer, A., Stenzel, H., Tittel, K., Wunsch, M., Beuselinck, R., Cameron, W., Davies, G., Dornan, P.J., Girone, M., Marinelli, N., Nowell, J., Rutherford, S.A., Sedgbeer, J.K., Thompson, J.C., White, R., Ghete, V.M., Girtler, P., Kneringer, E., Kuhn, D., Rudolph, G., Bouhova-Thacker, E., Bowdery, C.K., Clarke, D.P., Ellis, G., Finch, A.J., Foster, F., Hughes, G., Jones, R.W.L., Pearson, M.R., Robertson, N.A., Smizanska, M., van der Aa, O., Delaere, C., Leibenguth, G., Lemaitre, V., Blumenschein, U., Hölldorfer, F., Jakobs, K., Kayser, F., Müller, A.-S., Renk, B., Sander, H.-G., Schmeling, S., Wachsmuth, H., Zeitnitz, C., Ziegler, T., Bonissent, A., Coyle, P., Curtil, C., Ealet, A., Fouchez, D., Payre, P., Tilquin, A., Ragusa, F., David, A., Dietl, H., Ganis, G., Hüttmann, K., Lütjens, G., Männer, W., Moser, H.-G., Settles, R., Villegas, M., Wolf, G., Boucrot, J., Callot, O., Davier, M., Duflot, L., Grivaz, J.-F., Heusse, P., Jacholkowska, A., Serin, L., Veillet, J.-J., Azzurri, P., Bagliesi, G., Boccali, T., Foà, L., Giammanco, A., Giassi, A., Ligabue, F., Messineo, A., Palla, F., Sanguinetti, G., Sciabà, A., Sguazzoni, G., Spagnolo, P., Tenchini, R., Venturi, A., Verdini, P.G., Awunor, O., Blair, G.A., Cowan, G., Garcia-Bellido, A., Green, M.G., Medcalf, T., Misiejuk, A., Strong, J.A., Teixeira-Dias, P., Clifft, R.W., Edgecock, T.R., Norton, P.R., Tomalin, I.R., Ward, J.J., Bloch-Devaux, B., Boumediene, D., Colas, P., Fabbro, B., Lançon, E., Lemaire, M.-C., Locci, E., Perez, P., Rander, J., Tuchming, B., Vallage, B., Litke, A.M., Taylor, G., Booth, C.N., Cartwright, S., Combley, F., Hodgson, P.N., Lehto, M., Thompson, L.F., Böhrer, A., Brandt, S., Grupen, C., Hess, J., Ngac, A., Prange, G., Borean, C., Giannini, G., He, H., Putz, J., Rothberg, J., Armstrong, S.R., Berkelman, K., Cranmer, K., Ferguson, D.P.S., Gao, Y., González, S., Hayes, O.J., Hu, H., Jin, S., Kile, J., McNamara III, P.A., Nielsen, J., Pan, Y.B., von Wimmersperg-Toeller, J.H., Wiedenmann, W., Wu, J., Wu, S.L., Wu, X., Zobernig, G., Dissertori, G., Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., Alemany-Fernandez, R., Allmendinger, T., Allport, P.P., Amaldi, U., Amapane, N., Amato, S., Anashkin, E., Andreazza, A., Andringa, S., Anjos, N., Antilogus, P., Apel, W.-D., Arnoud, Y., Ask, S., Asman, B., Augustin, J.E., Augustinus, A., Baillon, P., Ballestrero, A., Bambade, P., Barbier, R., Bardin, D., Barker, G.J., Baroncelli, A., Battaglia, M., Baubillier, M., Becks, K.-H., Begalli, M., Behrmann, A., Ben-Haim, E., Benekos, N., Benvenuti, A., Berat, C., Berggren, M., Berntzon, L., Bertrand, D., Besancon, M., Besson, N., Bloch, D., Blom, M., Bluj, M., Bonesini, M., Boonekamp, M., Booth, P.S.L., Borisov, G., Botner, O., Bouquet, B., Bowcock, T.J.V., Boyko, I., Bracko, M., Brenner, R., Brodet, E., Bruckman, P., Brunet, J.M., Buschbeck, B., Buschmann, P., Calvi, M., Camporesi, T., Canale, V., Carena, F., Castro, N., Cavallo, F., Chapkin, M., Charpentier, P., Checchia, P., Chierici, R., Chliapnikov, P., Chudoba, J., Chung, S.U., Cieslik, K., Collins, P., Contri, R., Cosme, G., Cossutti, F., Costa, M.J., Crennell, D., Cuevas, J., D’Hondt, J., Dalmau, J., da Silva, T., Da Silva, W., Della Ricca, G., De Angelis, A., De Boer, W., De Clercq, C., De Lotto, B., De Maria, N., De Min, A., de Paula, L., Di Ciaccio, L., Di Simone, A., Doroba, K., Drees, J., Eigen, G., Ekelof, T., Ellert, M., Elsing, M., Espirito Santo, M.C., Fanourakis, G., Fassouliotis, D., Feindt, M., Fernandez, J., Ferrer, A., Ferro, F., Flagmeyer, U., Foeth, H., Fokitis, E., Fulda-Quenzer, F., Fuster, J., Gandelman, M., Garcia, C., Gavillet, P., Gazis, E., Gokieli, R., Golob, B., Gomez-Ceballos, G., Goncalves, P., Graziani, E., Grosdidier, G., Grzelak, K., Guy, J., Haag, C., Hallgren, A., Hamacher, K., Hamilton, K., Haug, S., Hauler, F., Hedberg, V., Hennecke, M., Herr, H., Hoffman, J., Holmgren, S.-O., Holt, P.J., Houlden, M.A., Hultqvist, K., Jackson, J.N., Jarlskog, G., Jarry, P., Jeans, D., Johansson, E.K., Johansson, P.D., Jonsson, P., Joram, C., Jungermann, L., Kapusta, F., Katsanevas, S., Katsoufis, E., Kernel, G., Kersevan, B.P., Kerzel, U., King, B.T., Kjaer, N.J., Kluit, P., Kokkinias, P., Kourkoumelis, C., Kouznetsov, O., Krumstein, Z., Kucharczyk, M., Lamsa, J., Leder, G., Ledroit, F., Leinonen, L., Leitner, R., Lemonne, J., Lepeltier, V., Lesiak, T., Liebig, W., Liko, D., Lipniacka, A., Lopes, J.H., Lopez, J.M., Loukas, D., Lutz, P., Lyons, L., MacNaughton, J., Malek, A., Maltezos, S., Mandl, F., Marco, J., Marco, R., Marechal, B., Margoni, M., Marin, J.-C., Mariotti, C., Markou, A., Martinez-Rivero, C., Masik, J., Mastroyiannopoulos, N., Matorras, F., Matteuzzi, C., Mazzucato, F., Mazzucato, M., Mc Nulty, R., Meroni, C., Migliore, E., Mitaroff, W., Mjoernmark, U., Moa, T., Moch, M., Moenig, K., Monge, R., Montenegro, J., Moraes, D., Moreno, S., Morettini, P., Mueller, U., Muenich, K., Mulders, M., Mundim, L., Murray, W., Muryn, B., Myatt, G., Myklebust, T., Nassiakou, M., Navarria, F., Nawrocki, K., Nicolaidou, R., Nikolenko, M., Oblakowska-Mucha, A., Obraztsov, V., Olshevski, A., Onofre, A., Orava, R., Osterberg, K., Ouraou, A., Oyanguren, A., Paganoni, M., Paiano, S., Palacios, J.P., Palka, H., Papadopoulou, T.D., Pape, L., Parkes, C., Parodi, F., Parzefall, U., Passeri, A., Passon, O., Peralta, L., Perepelitsa, V., Perrotta, A., Petrolini, A., Piedra, J., Pieri, L., Pierre, F., Pimenta, M., Piotto, E., Podobnik, T., Poireau, V., Pol, M.E., Polok, G., Pozdniakov, V., Pukhaeva, N., Pullia, A., Rames, J., Read, A., Rebecchi, P., Rehn, J., Reid, D., Reinhardt, R., Renton, P., Richard, F., Ridky, J., Rivero, M., Rodriguez, D., Romero, A., Ronchese, P., Roudeau, P., Rovelli, T., Ruhlmann-Kleider, V., Ryabtchikov, D., Sadovsky, A., Salmi, L., Salt, J., Sander, C., Savoy-Navarro, A., Schwickerath, U., Segar, A., Sekulin, R., Siebel, M., Sisakian, A., Smadja, G., Smirnova, O., Sokolov, A., Sopczak, A., Sosnowski, R., Spassov, T., Stanitzki, M., Stocchi, A., Strauss, J., Stugu, B., Szczekowski, M., Szeptycka, M., Szumlak, T., Tabarelli, T., Taffard, A.C., Tegenfeldt, F., Timmermans, J., Tkatchev, L., Tobin, M., Todorovova, S., Tome, B., Tonazzo, A., Tortosa, P., Travnicek, P., Treille, D., Tristram, G., Trochimczuk, M., Troncon, C., Turluer, M.-L., Tyapkin, I.A., Tyapkin, P., Tzamarias, S., Uvarov, V., Valenti, G., Van Dam, P., Van Eldik, J., van Remortel, N., Van Vulpen, I., Vegni, G., Veloso, F., Venus, W., Verdier, P., Verzi, V., Vilanova, D., Vitale, L., Vrba, V., Wahlen, H., Washbrook, A.J., Weiser, C., Wicke, D., Wickens, J., Wilkinson, G., Winter, M., Witek, M., Yushchenko, O., Zalewska, A., Zalewski, P., Zavrtanik, D., Zhuravlov, V., Zimin, N.I., Zintchenko, A., Zupan, M., Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.G., Anderhub, H., Andreev, V.P., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, G., Baksay, L., Baldew, S.V., Banerjee, S., Banerjee, Sw., Barczyk, A., Barillère, R., Bartalini, P., Basile, M., Batalova, N., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bellucci, L., Berbeco, R., Berdugo, J., Berges, P., Bertucci, B., Betev, B.L., Biasini, M., Biglietti, M., Biland, A., Blaising, J.J., Blyth, S.C., Bobbink, G.J., Böhm, A., Boldizsar, L., Borgia, B., Bottai, S., Bourilkov, D., Bourquin, M., Braccini, S., Branson, J.G., Brochu, F., Burger, J.D., Burger, W.J., Cai, X.D., Capell, M., Cara Romeo, G., Carlino, G., Cartacci, A., Casaus, J., Cavallari, F., Cavallo, N., Cecchi, C., Cerrada, M., Chamizo, M., Chang, Y.H., Chemarin, M., Chen, A., Chen, G., Chen, G.M., Chen, H.F., Chen, H.S., Chiefari, G., Cifarelli, L., Cindolo, F., Clare, I., Clare, R., Coignet, G., Colino, N., Costantini, S., de la Cruz, B., Cucciarelli, S., de Asmundis, R., Déglon, P., Debreczeni, J., Degré, A., Dehmelt, K., Deiters, K., della Volpe, D., Delmeire, E., Denes, P., DeNotaristefani, F., De Salvo, A., Diemoz, M., Dierckxsens, M., Dionisi, C., Dittmar, M., Doria, A., Dova, M.T., Duchesneau, D., Duda, M., Echenard, B., Eline, A., El Hage, A., El Mamouni, H., Engler, A., Eppling, F.J., Extermann, P., Falagan, M.A., Falciano, S., Favara, A., Fay, J., Fedin, O., Felcini, M., Ferguson, T., Fesefeldt, H., Fiandrini, E., Field, J.H., Filthaut, F., Fisher, P.H., Fisher, W., Forconi, G., Freudenreich, K., Furetta, C., Galaktionov, Yu., Ganguli, S.N., Garcia-Abia, P., Gataullin, M., Gentile, S., Giagu, S., Gong, Z.F., Grenier, G., Grimm, O., Gruenewald, M.W., Guida, M., Gupta, V.K., Gurtu, A., Gutay, L.J., Haas, D., Hatzifotiadou, D., Hebbeker, T., Hervé, A., Hirschfelder, J., Hofer, H., Hohlmann, M., Holzner, G., Hou, S.R., Hu, J., Jin, B.N., Jindal, P., Jones, L.W., de Jong, P., Josa-Mutuberría, I., Kaur, M., Kienzle-Focacci, M.N., Kim, J.K., Kirkby, J., Kittel, W., Klimentov, A., König, A.C., Kopal, M., Koutsenko, V., Kräber, M., Kraemer, R.W., Krüger, A., Kunin, A., Ladron de Guevara, P., Laktineh, I., Landi, G., Lebeau, M., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Le Coultre, P., Le Goff, J.M., Leiste, R., Levtchenko, M., Levtchenko, P., Li, C., Likhoded, S., Lin, C.H., Lin, W.T., Linde, F.L., Lista, L., Liu, Z.A., Lohmann, W., Longo, E., Lu, Y.S., Luci, C., Luminari, L., Lustermann, W., Ma, W.G., Malgeri, L., Malinin, A., Ma na, C., Mans, J., Martin, J.P., Marzano, F., Mazumdar, K., McNeil, R.R., Mele, S., Merola, L., Meschini, M., Metzger, W.J., Mihul, A., Milcent, H., Mirabelli, G., Mnich, J., Mohanty, G.B., Muanza, G.S., Muijs, A.J.M., Musicar, B., Musy, M., Nagy, S., Natale, S., Napolitano, M., Nessi-Tedaldi, F., Newman, H., Nisati, A., Novak, T., Nowak, H., Ofierzynski, R., Organtini, G., Pal, I., Palomares, C., Paolucci, P., Paramatti, R., Passaleva, G., Patricelli, S., Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pedace, M., Pensotti, S., Perret-Gallix, D., Piccolo, D., Pierella, F., Pieri, M., Pioppi, M., Piroué, P.A., Pistolesi, E., Plyaskin, V., Pohl, M., Pojidaev, V., Pothier, J., Prokofiev, D., Rahal-Callot, G., Rahaman, M.A., Raics, P., Raja, N., Ramelli, R., Rancoita, P.G., Ranieri, R., Raspereza, A., Razis, P., Rembeczki, S., Ren, D., Rescigno, M., Reucroft, S., Riemann, S., Riles, K., Roe, B.P., Romero, L., Rosca, A., Rosemann, C., Rosenbleck, C., Rosier-Lees, S., Roth, S., Rubio, J.A., Ruggiero, G., Rykaczewski, H., Sakharov, A., Saremi, S., Sarkar, S., Salicio, J., Sanchez, E., Schäfer, C., Schegelsky, V., Schopper, H., Schotanus, D.J., Sciacca, C., Servoli, L., Shevchenko, S., Shivarov, N., Shoutko, V., Shumilov, E., Shvorob, A., Son, D., Souga, C., Spillantini, P., Steuer, M., Stickland, D.P., Stoyanov, B., Straessner, A., Sudhakar, K., Sultanov, G., Sun, L.Z., Sushkov, S., Suter, H., Swain, J.D., Szillasi, Z., Tang, X.W., Tarjan, P., Tauscher, L., Taylor, L., Tellili, B., Teyssier, D., Timmermans, C., Ting, S.C.C., Ting, S.M., Tonwar, S.C., Tóth, J., Tully, C., Tung, K.L., Ulbricht, J., Valente, E., Van de Walle, R.T., Vasquez, R., Vesztergombi, G., Vetlitsky, I., Viertel, G., Vivargent, M., Vlachos, S., Vodopianov, I., Vogel, H., Vogt, H., Vorobiev, I., Vorobyov, A.A., Wadhwa, M., Wang, Q., Wang, X.L., Wang, Z.M., Weber, M., Wynhoff, S., Xia, L., Xu, Z.Z., Yamamoto, J., Yang, B.Z., Yang, C.G., Yang, H.J., Yang, M., Yeh, S.C., Zalite, An., Zalite, Yu., Zhang, Z.P., Zhao, J., Zhu, G.Y., Zhu, R.Y., Zhuang, H.L., Zichichi, A., Zimmermann, B., Zöller, M., Abbiendi, G., Ainsley, C., Åkesson, P.F., Alexander, G., Allison, J., Amaral, P., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, K.W., Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, R.M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., de Jong, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J.W., Gascon-Shotkin, S.M., Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwé, M., Günther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, K., Horváth, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jost, U., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Krämer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mättig, P., McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O’Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pásztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, D.E., Poli, B., Pooth, O., Przybycień, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schörner-Sadenius, T., Schröder, M., Schumacher, M., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Söldner-Rembold, S., Spano, F., Stahl, A., Strom, D., Ströhmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvári, B., Vollmer, C.F., Vannerem, P., Vértesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, L., Heinemeyer, S., Pilaftsis, A., Weiglein, G., and The LEP Working Group for Higgs Boson Searches

Published
2006
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47. Measurement of the strong coupling αS from four-jet observables in e+e- annihilation

Author

Abbiendi, G., Ainsley, C., Åkesson, P.F., Alexander, G., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, K.W., Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, R.M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J.W., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwé, M., Günther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Horváth, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Krämer, T., Krasznahorkay, A., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Mashimo, T., Mättig, P., McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O’Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pásztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, D.E., Pooth, O., Przybycień, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schörner-Sadenius, T., Schröder, M., Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Söldner-Rembold, S., Spano, F., Stahl, A., Strom, D., Ströhmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvári, B., Vollmer, C.F., Vannerem, P., Vértesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, L., and The OPAL Collaboration

Published
2006
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48. Liquid xenon scintillation calorimetry and Xe optical properties

Author

Baldini, A., Bemporad, C., Cei, F., Doke, T., Grassi, M., Haruyama, T., Mihara, S., Mori, T., Nicolo, D., Nishiguchi, H., Ootani, W., Ozone, K., Papa, A., Pazzi, R., Sawada, R., Sergiampietri, F., Signorelli, G., Suzuki, S., and Terasawa, K.

Subjects
Dielectrics -- Research, Xenon -- Research, Business, Electronics, Electronics and electrical industries
Abstract

The optical properties of liquid xenon (LXe) in the vacuum ultra violet (VUV), determining the performance of a scintillation calorimeter, are discussed in detail. The available data, measured in a wider spectral region from visible to UV light, and in a large range of Xe densities, from gas to liquid, are examined. It is shown that this information can be used for deriving the LXe optical properties in the VUV. A comparison is made with the few direct measurements in LXe for VUV light resulting from the LXe excitation by ionizing particles. A useful relation is obtained which connects the Rayleigh scattering length to the refractive index in LXe. Index Terms--Liquid xenon, VUV light.

Published
2006

50. Search for lepton flavour violating muon decay mediated by a new light particle in the MEG experiment

Author

Baldini, A. M., primary, Berg, F., additional, Biasotti, M., additional, Boca, G., additional, Cattaneo, P. W., additional, Cavoto, G., additional, Cei, F., additional, Chiappini, M., additional, Chiarello, G., additional, Chiri, C., additional, Corvaglia, A., additional, de Bari, A., additional, De Gerone, M., additional, Francesconi, M., additional, Galli, L., additional, Gatti, F., additional, Grancagnolo, F., additional, Grassi, M., additional, Grigoriev, D. N., additional, Hildebrandt, M., additional, Hodge, Z., additional, Ieki, K., additional, Ignatov, F., additional, Iwai, R., additional, Iwamoto, T., additional, Kobayashi, S., additional, Kettle, P.-R., additional, Kyle, W., additional, Khomutov, N., additional, Kolesnikov, A., additional, Kravchuk, N., additional, Kuchinskiy, N., additional, Libeiro, T., additional, Lim, G. M. A., additional, Malyshev, V., additional, Matsuzawa, N., additional, Meucci, M., additional, Mihara, S., additional, Molzon, W., additional, Mori, Toshinori, additional, Mtchedilishvili, A., additional, Nakao, M., additional, Natori, H., additional, Nicolò, D., additional, Nishiguchi, H., additional, Nishimura, M., additional, Ogawa, S., additional, Onda, R., additional, Ootani, W., additional, Oya, A., additional, Palo, D., additional, Panareo, M., additional, Papa, A., additional, Pettinacci, V., additional, Pizzigoni, G., additional, Popov, A., additional, Renga, F., additional, Ritt, S., additional, Rozhdestvensky, A., additional, Rossella, M., additional, Sawada, R., additional, Schwendimann, P., additional, Signorelli, G., additional, Stoykov, A., additional, Tassielli, G. F., additional, Toyoda, K., additional, Uchiyama, Y., additional, Usami, M., additional, Voena, C., additional, Yanai, K., additional, and Yudin, Yu. V., additional

Published
2020
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