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1. East Asian dust storm in May 2017: observations, modelling, and its influence on the Asia-Pacific region

Author

X.-X. Zhang, B. Sharratt, L.-Y. Liu, Z.-F. Wang, X.-L. Pan, J.-Q. Lei, S.-X. Wu, S.-Y. Huang, Y.-H. Guo, J. Li, X. Tang, T. Yang, Y. Tian, X.-S. Chen, J.-Q. Hao, H.-T. Zheng, Y.-Y. Yang, and Y.-L. Lyu

Subjects
Physics, QC1-999, Chemistry, QD1-999
Abstract

A severe dust storm event originated from the Gobi Desert in Central and East Asia during 2–7 May 2017. Based on Moderate Resolution Imaging Spectroradiometer (MODIS) satellite products, hourly environmental monitoring measurements from Chinese cities and East Asian meteorological observation stations, and numerical simulations, we analysed the spatial and temporal characteristics of this dust event as well as its associated impact on the Asia-Pacific region. The maximum observed hourly PM10 (particulate matter with an aerodynamic diameter ≤ 10 µm) concentration was above 1000 µg m−3 in Beijing, Tianjin, Shijiazhuang, Baoding, and Langfang and above 2000 µg m−3 in Erdos, Hohhot, Baotou, and Alxa in northern China. This dust event affected over 8.35 million km2, or 87 % of the Chinese mainland, and significantly deteriorated air quality in 316 cities of the 367 cities examined across China. The maximum surface wind speed during the dust storm was 23–24 m s−1 in the Mongolian Gobi Desert and 20–22 m s−1 in central Inner Mongolia, indicating the potential source regions of this dust event. Lidar-derived vertical dust profiles in Beijing, Seoul, and Tokyo indicated dust aerosols were uplifted to an altitude of 1.5–3.5 km, whereas simulations by the Weather Research and Forecasting with Chemistry (WRF-Chem) model indicated 20.4 and 5.3 Tg of aeolian dust being deposited respectively across continental Asia and the North Pacific Ocean. According to forward trajectory analysis by the FLEXible PARTicle dispersion (FLEXPART) model, the East Asian dust plume moved across the North Pacific within a week. Dust concentrations decreased from the East Asian continent across the Pacific Ocean from a magnitude of 103 to 10−5 µg m−3, while dust deposition intensity ranged from 104 to 10−1 mg m−2. This dust event was unusual due to its impact on continental China, the Korean Peninsula, Japan, and the North Pacific Ocean. Asian dust storms such as those observed in early May 2017 may lead to wider climate forcing on a global scale.

Published
2018
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7. The relationship between resting electroencephalogram oscillatory abnormalities and schizotypal personality traits in the first-degree relatives of schizophrenia patients

Author

Wentao Ma, He Huang, Xiquan Zhu, Chen Chen, Qi Kang, Xianjun Chen, Xufeng Liu, Wei Huang, Muzhen Guan, S.-X. Wu, Xiufang Shi, Yapei Wang, and Xiuchao Wang

Subjects
Adult, Male, 0301 basic medicine, medicine.medical_specialty, media_common.quotation_subject, Electroencephalography, Audiology, Correlation, Young Adult, 03 medical and health sciences, 0302 clinical medicine, medicine, Humans, Personality, Family, First-degree relatives, Big Five personality traits, media_common, medicine.diagnostic_test, Resting state fMRI, business.industry, General Neuroscience, Middle Aged, medicine.disease, 030104 developmental biology, Schizophrenia, Female, Schizophrenic Psychology, Analysis of variance, business, 030217 neurology & neurosurgery
Abstract

Although a large amount of studies have manifested resting state electroencephalogram oscillatory abnormalities in schizophrenia and their first-degree relatives and in schizotype, the results are far from consistent and no research found any relationship between electroencephalograph (EEG) abnormalities and schizotypal personality in first-degree relatives. The present study is to verify the modifications of EEG power spectra in eyes-open resting state of schizophrenia and first-degree relatives, and to investigate associations between EEG band power and schizotypal personality traits in first-degree relatives of schizophrenia patients. Participant samples in this study consisted of 33 healthy normal controls, 35 unaffected first-degree relatives of schizophrenia patients and 35 schizophrenia patients. Group differences in resting EEG band power were examined via repeated-measures analysis of variance, and correlation between EEG power and schizotypal personality traits via Pearson Correlation analysis. The results showed that patients with schizophrenia exhibited increased delta, theta and alpha activity over anterior and central regions in eyes-open resting state compared with that of normal control. Gamma band power was found for the first time to be negatively correlated to schizotypal personality traits in first-degree relatives of schizophrenia patients. To conclusion, these findings suggested that low-frequency EEG activity might be neural manifestations of pathophysiological changes in the brain of schizophrenia, and gamma band activity might be an approach to measure the genetic liability of the disorder.

Published
2019

8. Search for Majoron-emitting modes of Xe136 double beta decay with the complete EXO-200 dataset

Author

S. Al Kharusi, G. Anton, I. Badhrees, P. S. Barbeau, D. Beck, V. Belov, T. Bhatta, M. Breidenbach, T. Brunner, G. F. Cao, W. R. Cen, C. Chambers, B. Cleveland, M. Coon, A. Craycraft, T. Daniels, L. Darroch, S. J. Daugherty, J. Davis, S. Delaquis, A. Der Mesrobian-Kabakian, R. DeVoe, J. Dilling, A. Dolgolenko, M. J. Dolinski, J. Echevers, W. Fairbank, D. Fairbank, J. Farine, S. Feyzbakhsh, P. Fierlinger, D. Fudenberg, P. Gautam, R. Gornea, G. Gratta, C. Hall, E. V. Hansen, J. Hoessl, P. Hufschmidt, M. Hughes, A. Iverson, A. Jamil, C. Jessiman, M. J. Jewell, A. Johnson, A. Karelin, L. J. Kaufman, T. Koffas, R. Krücken, A. Kuchenkov, K. S. Kumar, Y. Lan, A. Larson, B. G. Lenardo, D. S. Leonard, G. S. Li, S. Li, Z. Li, C. Licciardi, Y. H. Lin, R. MacLellan, T. McElroy, T. Michel, B. Mong, D. C. Moore, K. Murray, O. Njoya, O. Nusair, A. Odian, I. Ostrovskiy, A. Perna, A. Piepke, A. Pocar, F. Retière, A. L. Robinson, P. C. Rowson, D. Ruddell, J. Runge, S. Schmidt, D. Sinclair, K. Skarpaas, A. K. Soma, V. Stekhanov, M. Tarka, S. Thibado, J. Todd, T. Tolba, T. I. Totev, R. Tsang, B. Veenstra, V. Veeraraghavan, P. Vogel, J.-L. Vuilleumier, M. Wagenpfeil, J. Watkins, M. Weber, L. J. Wen, U. Wichoski, G. Wrede, S. X. Wu, Q. Xia, D. R. Yahne, L. Yang, Y.-R. Yen, O. Ya. Zeldovich, and T. Ziegler

Subjects
010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences
Published
2021

9. Imaging individual barium atoms in solid xenon for barium tagging in nEXO

Author

X. S. Jiang, A. Der Mesrobian-Kabakian, T. Tolba, S. Rescia, D. Fairbank, A. Piepke, Y. Y. Ding, O. Zeldovich, D. Kodroff, T. Daniels, J. Echevers, R. DeVoe, M. Hughes, Simon Johnston, R. Saldanha, O. Nusair, R. Krücken, Alexis G. Schubert, R. MacLellan, G. St-Hilaire, C. Chambers, I. J. Arnquist, Lorenzo Fabris, J.-L. Vuilleumier, N. Roy, Yuehe Lin, U. Wichoski, L. Cao, David Moore, B. T. Cleveland, John L. Orrell, S. Kravitz, F. Nolet, Veljko Radeka, Jens Dilling, B. Mong, M. Wagenpfeil, J. Dalmasson, T. Ziegler, J. P. Brodsky, T. Bhatta, P. C. Rowson, A.C. Odian, I. Badhrees, M. Heffner, Z. Li, Gerrit Wrede, D. Fudenberg, S. X. Wu, M. Tarka, F. Vachon, G. Li, Douglas H Beck, L. J. Wen, S. Parent, Samuele Sangiorgio, A. House, David Leonard, W. Cree, L. Darroch, J. Todd, G. Gallina, Y-R Yen, Thomas Koffas, W. M. Fairbank, I. Ostrovskiy, K. S. Kumar, D. A. Harris, X.L. Sun, J. B. Zhao, S. Delaquis, T. Stiegler, A. Kuchenkov, M. J. Dolinski, X. F. Wu, A. Larson, Yunyan Zhou, O. Njoya, E. V. Hansen, Giorgio Gratta, K. Skarpaas, Ethan Brown, A. Iverson, Triveni Rao, M. Weber, Shu Li, A. Karelin, P. Hufschmidt, David A. Sinclair, Wei Wu, R.J. Newby, T. Rossignol, M. J. Jewell, Qun-Yao Wang, Zhijun Ning, Y. Ito, L. J. Kaufman, Wei Wei, Rejean Fontaine, S. J. Daugherty, F. Bourque, Y. Lan, Liang Yang, R. Tsang, A. Jamil, S. Feyzbakhsh, C. Licciardi, W. R. Cen, R. Gornea, Guofu Cao, E. Raguzin, J. Farine, Eric W. Hoppe, Gerard Visser, A. Burenkov, T. Brunner, Arun Kumar Soma, Justin Albert, J. Watkins, V.N. Stekhanov, M. Coon, A. Pocar, Cory T. Overman, T. Tsang, A. Craycraft, Venkatesh Veeraraghavan, F. Retiere, Angelo Dragone, Jochen M. Schneider, Qing Xia, X. Zhang, M. Chiu, J. Hößl, P. S. Barbeau, G. S. Ortega, Jean-Francois Pratte, V. A. Belov, M. Oriunno, Serge A. Charlebois, T. I. Totev, K. Murray, Gisela Anton, T. Walton, J. Daughhetee, A. E. Robinson, K. Odgers, M. Côté, Thilo Michel, and Gabriele Giacomini

Subjects
Physics, Sapphire window, Multidisciplinary, 010308 nuclear & particles physics, Analytical chemistry, chemistry.chemical_element, Barium, 01 natural sciences, Particle identification, Background level, Xenon, chemistry, Double beta decay, 0103 physical sciences, Atom, Neutrino, 010306 general physics
Abstract

Author(s): Chambers, C; Walton, T; Fairbank, D; Craycraft, A; Yahne, DR; Todd, J; Iverson, A; Fairbank, W; Alamare, A; Albert, JB; Anton, G; Arnquist, IJ; Badhrees, I; Barbeau, PS; Beck, D; Belov, V; Bhatta, T; Bourque, F; Brodsky, JP; Brown, E; Brunner, T; Burenkov, A; Cao, GF; Cao, L; Cen, WR; Charlebois, SA; Chiu, M; Cleveland, B; Coon, M; Cree, W; Cote, M; Dalmasson, J; Daniels, T; Darroch, L; Daugherty, SJ; Daughhetee, J; Delaquis, S; Mesrobian-Kabakian, A Der; DeVoe, R; Dilling, J; Ding, YY; Dolinski, MJ; Dragone, A; Echevers, J; Fabris, L; Farine, J; Feyzbakhsh, S; Fontaine, R; Fudenberg, D; Giacomini, G; Gornea, R; Gratta, G; Hansen, EV; Heffner, M; Hoppe, EW; Hosl, J; House, A; Hufschmidt, P; Hughes, M; Ito, Y; Jamil, A; Jessiman, C; Jewell, MJ; Jiang, XS; Karelin, A; Kaufman, LJ; Kodroff, D; Koffas, T; Kravitz, S; Krucken, R; Kuchenkov, A; Kumar, KS; Lan, Y; Larson, A; Leonard, DS; Li, G; Li, S; Li, Z; Licciardi, C; Lin, YH; Lv, P; MacLellan, R; Michel, T; Mong, B; Moore, DC | Abstract: The search for neutrinoless double beta decay probes the fundamental properties of neutrinos, including whether or not the neutrino and antineutrino are distinct. Double beta detectors are large and expensive, so background reduction is essential for extracting the highest sensitivity. The identification, or 'tagging', of the $^{136}$Ba daughter atom from double beta decay of $^{136}$Xe provides a technique for eliminating backgrounds in the nEXO neutrinoless double beta decay experiment. The tagging scheme studied in this work utilizes a cryogenic probe to trap the barium atom in solid xenon, where the barium atom is tagged via fluorescence imaging in the solid xenon matrix. Here we demonstrate imaging and counting of individual atoms of barium in solid xenon by scanning a focused laser across a solid xenon matrix deposited on a sapphire window. When the laser sits on an individual atom, the fluorescence persists for $\sim$30~s before dropping abruptly to the background level, a clear confirmation of one-atom imaging. No barium fluorescence persists following evaporation of a barium deposit to a limit of $\leq$0.16\%. This is the first time that single atoms have been imaged in solid noble element. It establishes the basic principle of a barium tagging technique for nEXO.

Published
2019

10. Reflectivity of VUV-sensitive Silicon Photomultipliers in Liquid Xenon

Author

M. Heffner, Thilo Michel, M. Hughes, F. Vachon, Jean-Francois Pratte, Aleksey E. Bolotnikov, A. Craycraft, R. DeVoe, C. Gingras, C.R. Natzke, A. De St. Croix, T. I. Totev, K. Murray, Gisela Anton, J. C. Nzobadila Ondze, S. Al Kharusi, R. Saldanha, O. Nusair, J. Ringuette, R. Krücken, W. M. Fairbank, M. Worcester, A. Der Mesrobian-Kabakian, N. Massacret, Lorenzo Fabris, David Moore, Wen-Qi Yan, K. Harouaka, R. Gornea, E. Hansen, C. T. Overman, Samuele Sangiorgio, I. Ostrovskiy, H. Rasiwala, M. Tarka, K. S. Kumar, M. Elbeltagi, R. Tsang, A. Larson, John L. Orrell, T. Daniels, E. Caden, F. Retière, Z. Li, Mike Richman, N. Roy, S. Feyzbakhsh, G. Giacomini, M. Murra, G. Li, E. Raguzin, A. Pocar, A. Iverson, Ethan Brown, B. Mong, C. Licciardi, F. Nolet, J. P. Brodsky, A. Tidball, T. McElroy, Shu Li, T. Rossignol, V. A. Belov, R. MacLellan, O. Zeldovich, M. Medina Peregrina, A. Karelin, B. T. Cleveland, K. Odgers, I. Badhrees, Venkatesh Veeraraghavan, D. Fairbank, A. Kuchenkov, M. Wagenpfeil, M. Walent, Giorgio Gratta, Qing Xia, Sergio Ferrara, C. Vivo-Vilches, D. Schulte, Govinda Adhikari, G. S. Ortega, J. Todd, Arun Kumar Soma, C. Weinheimer, T. Brunner, D. S. Leonard, Serge A. Charlebois, A. Odian, L. Darroch, S. Rescia, C. Huhmann, M. J. Dolinski, M. J. Jewell, R. Lindsay, D. Chernyak, L. Althueser, V.N. Stekhanov, M. L. Di Vacri, T. Ziegler, Y. Lan, S. Parent, L. J. Kaufman, A. Gorham, S. X. Wu, P. A. Breur, J. Bane, A. E. Robinson, Eric W. Hoppe, J. Echevers, D. Goeldi, G.J. Ramonnye, Liang Yang, A. Jamil, S. Thibado, C. Richard, M. Chiu, J. Farine, P. Martel-Dion, Guofu Cao, T. Bhatta, J. Nattress, E. Angelico, B. Chana, Douglas H Beck, T. Stiegler, J. Schneider, K. Deslandes, P. C. Rowson, A. House, A. Fieguth, C.A. Hardy, U. Wichoski, S. Viel, G. Gallina, A. Piepke, I. J. Arnquist, P. Gautam, K. G. Leach, R.J. Newby, S. Triambak, F. Spadoni, and C. Chambers

Subjects
Materials science, Physics - Instrumentation and Detectors, APDS, chemistry.chemical_element, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, 030218 nuclear medicine & medical imaging, law.invention, 03 medical and health sciences, 0302 clinical medicine, Optics, Silicon photomultiplier, Xenon, law, 0103 physical sciences, Wafer, Angular resolution, Instrumentation, Mathematical Physics, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Avalanche photodiode, chemistry, Angle of incidence (optics), business
Abstract

Silicon photomultipliers are regarded as a very promising technology for next-generation, cutting-edge detectors for low-background experiments in particle physics. This work presents systematic reflectivity studies of Silicon Photomultipliers (SiPM) and other samples in liquid xenon at vacuum ultraviolet (VUV) wavelengths. A dedicated setup at the University of M\"unster has been used that allows to acquire angle-resolved reflection measurements of various samples immersed in liquid xenon with 0.45{\deg} angular resolution. Four samples are investigated in this work: one Hamamatsu VUV4 SiPM, one FBK VUV-HD SiPM, one FBK wafer sample and one Large-Area Avalanche Photodiode (LA-APD) from EXO-200. The reflectivity is determined to be 25-36% at an angle of incidence of 20{\deg} for the four samples and increases to up to 65% at 70{\deg} for the LA-APD and the FBK samples. The Hamamatsu VUV4 SiPM shows a decline with increasing angle of incidence. The reflectivity results will be incorporated in upcoming light response simulations of the nEXO detector., Comment: 18 pages, 11 figures

Published
2021

11. NEXO: Neutrinoless double beta decay search beyond $10^{28}$ year half-life sensitivity

Author

G Adhikari, S Al Kharusi, E Angelico, G Anton, I J Arnquist, I Badhrees, J Bane, V Belov, E P Bernard, T Bhatta, A Bolotnikov, P A Breur, J P Brodsky, E Brown, T Brunner, E Caden, G F Cao, L Cao, C Chambers, B Chana, S A Charlebois, D Chernyak, M Chiu, B Cleveland, R Collister, S A Czyz, J Dalmasson, T Daniels, L Darroch, R DeVoe, M L Di Vacri, J Dilling, Y Y Ding, A Dolgolenko, M J Dolinski, A Dragone, J Echevers, M Elbeltagi, L Fabris, D Fairbank, W Fairbank, J Farine, S Ferrara, S Feyzbakhsh, Y S Fu, G Gallina, P Gautam, G Giacomini, W Gillis, C Gingras, D Goeldi, R Gornea, G Gratta, C A Hardy, K Harouaka, M Heffner, E W Hoppe, A House, A Iverson, A Jamil, M Jewell, X S Jiang, A Karelin, L J Kaufman, I Kotov, R Krücken, A Kuchenkov, K S Kumar, Y Lan, A Larson, K G Leach, B G Lenardo, D S Leonard, G Li, S Li, Z Li, C Licciardi, R Lindsay, R MacLellan, M Mahtab, P Martel-Dion, J Masbou, N Massacret, T McElroy, K McMichael, M Medina Peregrina, T Michel, B Mong, D C Moore, K Murray, J Nattress, C R Natzke, R J Newby, K Ni, F Nolet, O Nusair, J C Nzobadila Ondze, K Odgers, A Odian, J L Orrell, G S Ortega, C T Overman, S Parent, A Perna, A Piepke, A Pocar, J-F Pratte, N Priel, V Radeka, E Raguzin, G J Ramonnye, T Rao, H Rasiwala, S Rescia, F Retière, J Ringuette, V Riot, T Rossignol, P C Rowson, N Roy, R Saldanha, S Sangiorgio, X Shang, A K Soma, F Spadoni, V Stekhanov, X L Sun, M Tarka, S Thibado, A Tidball, J Todd, T Totev, S Triambak, R H M Tsang, T Tsang, F Vachon, V Veeraraghavan, S Viel, C Vivo-Vilches, P Vogel, J-L Vuilleumier, M Wagenpfeil, T Wager, M Walent, K Wamba, Q Wang, W Wei, L J Wen, U Wichoski, S Wilde, M Worcester, S X Wu, W H Wu, X Wu, Q Xia, W Yan, H Yang, L Yang, O Zeldovich, J Zhao, T Ziegler, Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), and nEXO

Subjects
Nuclear and High Energy Physics, background: effect, Physics - Instrumentation and Detectors, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], time-projection chambers, 01 natural sciences, neutrinoless double beta decay, Monte Carlo simulations, double-beta decay: (0neutrino), 0103 physical sciences, neutrino: mass, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, detector: design, xenon: liquid, 010308 nuclear & particles physics, neutrinos, Instrumentation and Detectors (physics.ins-det), sensitivity, time projection chamber, 3. Good health, photon: scintillation counter, copper, radioactivity, Xe-136, experimental results
Abstract

The nEXO neutrinoless double beta decay experiment is designed to use a time projection chamber and 5000 kg of isotopically enriched liquid xenon to search for the decay in $^{136}$Xe. Progress in the detector design, paired with higher fidelity in its simulation and an advanced data analysis, based on the one used for the final results of EXO-200, produce a sensitivity prediction that exceeds the half-life of $10^{28}$ years. Specifically, improvements have been made in the understanding of production of scintillation photons and charge as well as of their transport and reconstruction in the detector. The more detailed knowledge of the detector construction has been paired with more assays for trace radioactivity in different materials. In particular, the use of custom electroformed copper is now incorporated in the design, leading to a substantial reduction in backgrounds from the intrinsic radioactivity of detector materials. Furthermore, a number of assumptions from previous sensitivity projections have gained further support from interim work validating the nEXO experiment concept. Together these improvements and updates suggest that the nEXO experiment will reach a half-life sensitivity of $1.35\times 10^{28}$ yr at 90% confidence level in 10 years of data taking, covering the parameter space associated with the inverted neutrino mass ordering, along with a significant portion of the parameter space for the normal ordering scenario, for almost all nuclear matrix elements. The effects of backgrounds deviating from the nominal values used for the projections are also illustrated, concluding that the nEXO design is robust against a number of imperfections of the model., Comment: 26 pages, 19 figures, version accepted by Journal of Phys. G

Published
2021
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12. Measurement of the Spectral Shape of the β -Decay of Xe137 to the Ground State of Cs137 in EXO-200 and Comparison with Theory

Author

T. Tolba, E. V. Hansen, Qing Xia, A. Jamil, A. Pocar, S. Thibado, V. Veeraraghavan, C. Chambers, R. DeVoe, Petr Vogel, David Leonard, R. MacLellan, Thomas Koffas, D. Fudenberg, W. M. Fairbank, M. Coon, J. Davis, M. J. Jewell, T. Daniels, F. Retiere, V.N. Stekhanov, L. J. Kaufman, J. Farine, Jouni Suhonen, A. Piepke, J. Todd, R. Tsang, M. J. Dolinski, Jens Dilling, O. Nusair, L. Darroch, R. Krücken, U. Wichoski, M. Hughes, I. Badhrees, K. Skarpaas, J. Hoessl, V. Belov, A. Robinson, T. Bhatta, A. S. Johnson, T. Ziegler, S. Feyzbakhsh, W. R. Cen, K. Murray, S. Al Kharusi, O. Ya. Zeldovich, G. S. Li, R. Gornea, Martin Breidenbach, M. Wagenpfeil, Gisela Anton, P. Hufschmidt, David A. Sinclair, P. C. Rowson, S. X. Wu, B. Mong, J. L. Vuilleumier, Arun Kumar Soma, C. Licciardi, A. Der Mesrobian-Kabakian, Yuehe Lin, S. J. Daugherty, A. Odian, L. Yang, David Moore, Y. Lan, S. Delaquis, Z. Li, Guofu Cao, Giorgio Gratta, A. Larson, T. Brunner, C. R. Hall, A. Dolgolenko, Thilo Michel, C. Jessiman, I. Ostrovskiy, P. Nakarmi, A. Craycraft, K. S. Kumar, B. T. Cleveland, A. Kuchenkov, O. Njoya, B. G. Lenardo, J. Watkins, A. Iverson, D. R. Yahne, T. McElroy, A. Karelin, Shu Li, S. Schmidt, L. J. Wen, Marc Weber, D. Fairbank, B. Veenstra, J. Kostensalo, J. Echevers, Peter Fierlinger, T. I. Totev, Gerrit Wrede, M. Tarka, Douglas H Beck, P. S. Barbeau, Y-R Yen, D. Ruddell, J. Runge, and P. Gautam

Subjects
Physics, Spectral shape analysis, General Physics and Astronomy, Nuclear data, Context (language use), Electron, 7. Clean energy, 01 natural sciences, Spectral line, 0103 physical sciences, Neutron source, Atomic physics, 010306 general physics, Ground state, Energy (signal processing)
Abstract

We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden nonunique β-decay transition ^{137}Xe(7/2^{-})→^{137}Cs(7/2^{+}). The experimental data were acquired by the EXO-200 experiment during a deployment of an AmBe neutron source. The ultralow background environment of EXO-200, together with dedicated source deployment and analysis procedures, allowed for collection of a pure sample of the decays, with an estimated signal to background ratio of more than 99 to 1 in the energy range from 1075 to 4175 keV. In addition to providing a rare and accurate measurement of the first-forbidden nonunique β-decay shape, this work constitutes a novel test of the calculated electron spectral shapes in the context of the reactor antineutrino anomaly and spectral bump.

Published
2020

13. Measurement of the Spectral Shape of the β-Decay of ^{137}Xe to the Ground State of ^{137}Cs in EXO-200 and Comparison with Theory

Author

S, Al Kharusi, G, Anton, I, Badhrees, P S, Barbeau, D, Beck, V, Belov, T, Bhatta, M, Breidenbach, T, Brunner, G F, Cao, W R, Cen, C, Chambers, B, Cleveland, M, Coon, A, Craycraft, T, Daniels, L, Darroch, S J, Daugherty, J, Davis, S, Delaquis, A, Der Mesrobian-Kabakian, R, DeVoe, J, Dilling, A, Dolgolenko, M J, Dolinski, J, Echevers, W, Fairbank, D, Fairbank, J, Farine, S, Feyzbakhsh, P, Fierlinger, D, Fudenberg, P, Gautam, R, Gornea, G, Gratta, C, Hall, E V, Hansen, J, Hoessl, P, Hufschmidt, M, Hughes, A, Iverson, A, Jamil, C, Jessiman, M J, Jewell, A, Johnson, A, Karelin, L J, Kaufman, T, Koffas, J, Kostensalo, R, Krücken, A, Kuchenkov, K S, Kumar, Y, Lan, A, Larson, B G, Lenardo, D S, Leonard, G S, Li, S, Li, Z, Li, C, Licciardi, Y H, Lin, R, MacLellan, T, McElroy, T, Michel, B, Mong, D C, Moore, K, Murray, P, Nakarmi, O, Njoya, O, Nusair, A, Odian, I, Ostrovskiy, A, Piepke, A, Pocar, F, Retière, A L, Robinson, P C, Rowson, D, Ruddell, J, Runge, S, Schmidt, D, Sinclair, K, Skarpaas, A K, Soma, V, Stekhanov, J, Suhonen, M, Tarka, S, Thibado, J, Todd, T, Tolba, T I, Totev, R, Tsang, B, Veenstra, V, Veeraraghavan, P, Vogel, J-L, Vuilleumier, M, Wagenpfeil, J, Watkins, M, Weber, L J, Wen, U, Wichoski, G, Wrede, S X, Wu, Q, Xia, D R, Yahne, L, Yang, Y-R, Yen, O Ya, Zeldovich, and T, Ziegler

Abstract

We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden nonunique β-decay transition ^{137}Xe(7/2^{-})→^{137}Cs(7/2^{+}). The experimental data were acquired by the EXO-200 experiment during a deployment of an AmBe neutron source. The ultralow background environment of EXO-200, together with dedicated source deployment and analysis procedures, allowed for collection of a pure sample of the decays, with an estimated signal to background ratio of more than 99 to 1 in the energy range from 1075 to 4175 keV. In addition to providing a rare and accurate measurement of the first-forbidden nonunique β-decay shape, this work constitutes a novel test of the calculated electron spectral shapes in the context of the reactor antineutrino anomaly and spectral bump.

Published
2020

14. Event Reconstruction in a Liquid Xenon Time Projection Chamber with an Optically-Open Field Cage

Author

B. Chana, N. Roy, L. Cao, O. Nusair, G. St-Hilaire, Douglas H Beck, R. Krücken, F. Nolet, E. Raguzin, P. A. Breur, T. McElroy, T. Bhatta, L. J. Kaufman, Gerard Visser, D. Goeldi, M. Coon, Eric W. Hoppe, F. Vachon, Z. Li, C. Chambers, Veljko Radeka, Cory T. Overman, L. J. Wen, J. L. Vuilleumier, Samuele Sangiorgio, L. Darroch, P. Gautam, P. Nakarmi, Kaixuan Ni, K. S. Kumar, A. De St. Croix, R. Tsang, Haijun Yang, E. V. Hansen, P. Lv, E. Caden, S. X. Wu, J. Hößl, P. S. Barbeau, Lorenzo Fabris, I. J. Arnquist, R. Gornea, P. C. Rowson, V.N. Stekhanov, X. S. Jiang, C. Licciardi, A. Jamil, A. House, A. Piepke, J. Todd, G. Gallina, S. Thibado, Y. Y. Ding, A. Der Mesrobian-Kabakian, N. Massacret, M. Heffner, R. MacLellan, S. Viel, M. Worcester, Thilo Michel, V. Veeraraghavan, Qing Xia, M. Hughes, G. Li, Sergio Ferrara, S. Al Kharusi, R. DeVoe, A. Pocar, M. Walent, B. G. Lenardo, Arun Kumar Soma, S. Feyzbakhsh, Y. Lan, G. S. Ortega, B. T. Cleveland, K. Deslandes, T. Brunner, A. Kuchenkov, M. Medina-Peregrina, Serge A. Charlebois, F. Retiere, David Moore, M. Chiu, J. P. Brodsky, M. Tarka, F. Edaltafar, T. Wager, K. G. Leach, Wei Wu, R.J. Newby, Qun-Yao Wang, Zhijun Ning, M. Oriunno, Aleksey E. Bolotnikov, K. Murray, Gisela Anton, K. Odgers, B. Mong, M. J. Dolinski, David Leonard, Thomas Koffas, W. M. Fairbank, T. Tsang, T. Stiegler, Jean-Francois Pratte, Angelo Dragone, M. Elbeltagi, John L. Orrell, T. Daniels, Wei Wei, H. Rasiwala, I. Ostrovskiy, Yu-Guang Zhou, S. Rescia, D. Fairbank, Guofu Cao, Mike Richman, O. Njoya, T. I. Totev, A. Iverson, K. Skarpaas Viii, Shu Li, Giorgio Gratta, U. Wichoski, L. Yang, T. Rossignol, M. J. Jewell, A. Craycraft, T. Ziegler, Gabriele Giacomini, J. Echevers, Jens Dilling, C.R. Natzke, I. Badhrees, A. Tidball, M. L. di Vacri, C. Vivo-Vilches, S. Parent, A. Odian, O. Zeldovich, R. Saldanha, M. Wagenpfeil, J. Dalmasson, X.L. Sun, J. B. Zhao, X. F. Wu, A. Larson, Ethan Brown, A. Karelin, J. Farine, V. Belov, and A. Robinson

Subjects
Physics, Nuclear and High Energy Physics, Scintillation, Photon, Time projection chamber, Physics - Instrumentation and Detectors, Field (physics), 010308 nuclear & particles physics, chemistry.chemical_element, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Xenon, chemistry, Double beta decay, Ionization, 0103 physical sciences, Atomic physics, 010306 general physics, Instrumentation, Event reconstruction
Abstract

nEXO is a proposed tonne-scale neutrinoless double beta decay ($0\nu\beta\beta$) experiment using liquid ${}^{136}Xe$ (LXe) in a Time Projection Chamber (TPC) to read out ionization and scintillation signals. Between the field cage and the LXe vessel, a layer of LXe ("skin" LXe) is present, where no ionization signal is collected. Only scintillation photons are detected, owing to the lack of optical barrier around the field cage. In this work, we show that the light originating in the skin LXe region can be used to improve background discrimination by 5% over previous published estimates. This improvement comes from two elements. First, a fraction of the $\gamma$-ray background is removed by identifying light from interactions with an energy deposition in the skin LXe. Second, background from ${}^{222}Rn$ dissolved in the skin LXe can be efficiently rejected by tagging the $\alpha$ decay in the ${}^{214}Bi-{}^{214}Po$ chain in the skin LXe., Comment: 11 pages, 12 figures

Published
2020
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15. Measurement of the ionization yield of neutron-induced proton recoils in Tetramethylsilane

Author

Giorgio Gratta, B. G. Lenardo, and S. X. Wu

Subjects
Time projection chamber, Materials science, Proton, Physics::Instrumentation and Detectors, Nuclear Theory, FOS: Physical sciences, Neutron temperature, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), chemistry.chemical_compound, chemistry, Neutron generator, Yield (chemistry), Ionization, Neutron, Physics::Atomic Physics, Atomic physics, Nuclear Experiment, Instrumentation, Tetramethylsilane, Mathematical Physics
Abstract

We report on a low energy measurement of the ionization yield in a Tetramethylsilane Time Projection Chamber (TPC) using 2.8 MeV neutrons from a deuterium-deuterium neutron generator. The proton recoil charge yield is measured at four different electric fields, finding a dependence that is well described by the Thomas-Imel model. By comparing the proton recoil yield to that obtained from $\gamma$-ray calibrations, a quenching factor is obtained for each electric field. These results demonstrate the feasibility of using room temperature organic ionisation detectors to detect MeV-scale neutrons in the proton-recoil channel.

Published
2021

16. A Tetramethylsilane TPC with Cherenkov light readout and 3D reconstruction

Author

S. X. Wu, Giorgio Gratta, Marc Weber, and B. G. Lenardo

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Time projection chamber, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Physics::Instrumentation and Detectors, Detector, Gamma ray, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Electron, Radiation, 01 natural sciences, chemistry.chemical_compound, Optics, chemistry, 0103 physical sciences, 010306 general physics, business, Instrumentation, Tetramethylsilane, Cherenkov radiation
Abstract

We describe the construction and calibration of a multi-channel liquid time projection chamber filled with Tetramethylsilane (TMS). Its charge readout system consists of 8 wires each in the $X$ and $Y$ directions. The chamber is also equipped with a Cherenkov light readout system consisting of a 5-inch photomultiplier tube (PMT) coupled to the liquid volume through a viewport. The energy scale of the detector is calibrated using positron-electron pairs produced by 4.4 MeV gamma rays emitted from an AmBe source, using an external trigger on the positron annihilation gammas. The external trigger is then reconfigured to tag cosmic ray muons passing through the active TMS volume, which are used to measure the stopping power in TMS and the electron lifetime in the detector. We find a most-probable energy loss from minimum ionising particles (MIPs) of $\Delta_p/ds$ = (0.60$\pm$0.01) MeV/cm. We also derive an electron lifetime of 43$^{+680}_{-21}~\mu$s by measuring the most-probable energy loss as a function of drift time. For both fast electron and muon signals, the PMT detects prompt Cherenkov light, demonstrating the possibility of random triggering. The room-temperature organic target medium, together with the self-triggering capabilities and long electron lifetimes reported in this work, make this an attractive technology to further explore for rare event detectors or other applications in the area of radiation measurements., Comment: 8 pages, 12 figures

Published
2019

17. Measurements of electron transport in liquid and gas Xenon using a laser-driven photocathode

Author

R. Saldanha, I. Ostrovskiy, D. Kodroff, M. J. Dolinski, S. Rescia, John L. Orrell, T. Daniels, P. Gautam, D. Fairbank, Z. Li, E. Caden, E. V. Hansen, Gerard Visser, J. Watkins, Mike Richman, O. Njoya, R. MacLellan, He-Run Yang, A. Iverson, Triveni Rao, K. Skarpaas Viii, Liang Yang, R. Tsang, Gabriele Giacomini, A. Jamil, Pengpeng Lv, O. Nusair, R. Krücken, Shu Li, J. Echevers, Yu-Guang Zhou, Sergio Ferrara, B. Chana, Y. Lan, M. L. di Vacri, U. Wichoski, T. Wager, J. P. Brodsky, C. Vivo-Vilches, I. J. Arnquist, D. Beck, Thilo Michel, Y-R Yen, T. Tsang, T. Tolba, J. Runge, Yuehe Lin, T. Ziegler, Qun-Yao Wang, P. Nakarmi, Guofu Cao, M. Hughes, Jens Dilling, R. Fontaine, David Leonard, M. Heffner, Angelo Dragone, J. L. Vuilleumier, M. Walent, S. Al Kharusi, I. Badhrees, M. Tarka, Thomas Koffas, W. M. Fairbank, B. G. Lenardo, S. Viel, Arun Kumar Soma, T. Brunner, D. Goeldi, L. J. Kaufman, T. Stiegler, Samuele Sangiorgio, Xuan Wu, K. S. Kumar, S. Parent, M. Elbeltagi, M. Coon, K. G. Leach, David Moore, Wei Wei, Qing Xia, J. Farine, G. S. Ortega, Cory T. Overman, Wei Wu, R.J. Newby, P. C. Rowson, S. X. Wu, S. J. Daugherty, Serge A. Charlebois, A. House, G. St-Hilaire, S. Feyzbakhsh, P. S. Barbeau, A. Robinson, T. Bhatta, V. A. Belov, A.C. Odian, O. Zeldovich, Eric W. Hoppe, A. Piepke, J. Todd, L. Darroch, Y. Y. Ding, M. Oriunno, C. Chambers, A. Pocar, V.N. Stekhanov, B. T. Cleveland, T. Rossignol, A. Kuchenkov, M. J. Jewell, Veljko Radeka, X. S. Jiang, C. Licciardi, G. Gallina, A. Der Mesrobian-Kabakian, V. Veeraraghavan, A. Fucarino, Giorgio Gratta, M. Chiu, K. Murray, Gisela Anton, K. Odgers, E. Raguzin, J. Hossl, R. DeVoe, W. R. Cen, M. Medina-Peregrina, R. Gornea, F. Retiere, B. Mong, M. Wagenpfeil, J. Dalmasson, M. Ward, G. S. Li, X.L. Sun, J. B. Zhao, A. Larson, A. Craycraft, Ethan Brown, C.R. Natzke, A. Karelin, Jean-Francois Pratte, Z. Ning, T. I. Totev, A. De St. Croix, Lorenzo Fabris, N. Roy, L. Cao, F. Nolet, T. McElroy, F. Vachon, L. J. Wen, and Marc Weber

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, chemistry.chemical_element, Electron, medicine.disease_cause, 7. Clean energy, 01 natural sciences, Photocathode, Xenon, Electric field, 0103 physical sciences, medicine, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation, Nuclear Experiment, Physics, Argon, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), Photoelectric effect, chemistry, Quantum efficiency, High Energy Physics::Experiment, Atomic physics, Ultraviolet
Abstract

Measurements of electron drift properties in liquid and gaseous xenon are reported. The electrons are generated by the photoelectric effect in a semi-transparent gold photocathode driven in transmission mode with a pulsed ultraviolet laser. The charges drift and diffuse in a small chamber at various electric fields and a fixed drift distance of 2.0 cm. At an electric field of 0.5 kV/cm, the measured drift velocities and corresponding temperature coefficients respectively are 1 . 97 ± 0 . 04 m m ∕ μ s and ( − 0 . 69 ± 0 . 05 ) %/K for liquid xenon, and 1 . 42 ± 0 . 03 m m ∕ μ s and ( + 0 . 11 ± 0 . 01 ) %/K for gaseous xenon at 1.5 bar. In addition, we measure longitudinal diffusion coefficients of 25 . 7 ± 4 . 6 cm 2 /s and 149 ± 23 cm 2 /s, for liquid and gas, respectively. The quantum efficiency of the gold photocathode is studied at the photon energy of 4.73 eV in liquid and gaseous xenon, and vacuum. These charge transport properties and the behavior of photocathodes in a xenon environment are important in designing and calibrating future large scale noble liquid detectors.

Published
2019

19. Search for Neutrinoless Double-Beta Decay with the Complete EXO-200 Dataset

Author

D. R. Yahne, B. T. Cleveland, A. Kuchenkov, V.N. Stekhanov, C. Chambers, J. Watkins, J. Farine, C. R. Hall, A. Dolgolenko, D. Fudenberg, A. Craycraft, Peter Fierlinger, Gerrit Wrede, M. Tarka, J. Hoessl, Jens Dilling, D. Ruddell, V. Belov, I. Badhrees, L. Darroch, R. MacLellan, A. Robinson, A. Karelin, Qing Xia, Thilo Michel, J. Runge, Yuehe Lin, A. Odian, M. Hughes, R. DeVoe, M. Wagenpfeil, U. Wichoski, L. J. Kaufman, I. Ostrovskiy, Z. Li, B. G. Lenardo, Petr Vogel, A. Pocar, T. Ziegler, M. Danilov, T. Brunner, David Leonard, Giorgio Gratta, A. Piepke, J. Todd, A. Larson, O. Nusair, R. Krücken, P. S. Barbeau, O. Njoya, Thomas Koffas, K. S. Kumar, S. X. Wu, David Moore, J. L. Vuilleumier, W. M. Fairbank, O. Ya. Zeldovich, A. Iverson, M. J. Dolinski, P. Gautam, Shu Li, S. Schmidt, J. Davis, C. Jessiman, W. R. Cen, B. Mong, Y. Lan, R. Gornea, E. V. Hansen, T. Tolba, M. J. Jewell, F. Retiere, A. S. Johnson, Liang Yang, A. Jamil, M. Coon, Douglas H Beck, T. Daniels, Guofu Cao, Y-R Yen, S. Feyzbakhsh, Arun Kumar Soma, G. S. Li, P. Hufschmidt, David A. Sinclair, D. Fairbank, C. Licciardi, A. Der Mesrobian-Kabakian, J. Echevers, B. Veenstra, T. I. Totev, T. McElroy, L. J. Wen, Marc Weber, Martin Breidenbach, S. J. Daugherty, T. Bhatta, V. Veeraraghavan, K. Murray, Gisela Anton, P. C. Rowson, and S. Delaquis

Subjects
Physics, Q value, Resolution (electron density), Detector, General Physics and Astronomy, FOS: Physical sciences, 01 natural sciences, Lower limit, ddc, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Sensitivity (control systems), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Energy (signal processing)
Abstract

A search for neutrinoless double-beta decay ($0\nu\beta\beta$) in $^{136}$Xe is performed with the full EXO-200 dataset using a deep neural network to discriminate between $0\nu\beta\beta$ and background events. Relative to previous analyses, the signal detection efficiency has been raised from 80.8% to 96.4$\pm$3.0% and the energy resolution of the detector at the Q-value of $^{136}$Xe $0\nu\beta\beta$ has been improved from $\sigma/E=1.23\%$ to $1.15\pm0.02\%$ with the upgraded detector. Accounting for the new data, the median 90% confidence level $0\nu\beta\beta$ half-life sensitivity for this analysis is $5.0 \cdot 10^{25}$ yr with a total $^{136}$Xe exposure of 234.1 kg$\cdot$yr. No statistically significant evidence for $0\nu\beta\beta$ is observed, leading to a lower limit on the $0\nu\beta\beta$ half-life of $3.5\cdot10^{25}$ yr at the 90% confidence level., Comment: v1, 7 pages, 5 figures; v2, fix references; v3, update to accepted version

Published
2019

20. Influence of miR-34a on myocardial apoptosis in rats with acute myocardial infarction through the ERK1/2 pathway

Author

W-S, Bian, F-H, Tian, L-H, Jiang, Y-F, Sun, S-X, Wu, B-F, Gao, Z-X, Kang, Z, Zhuo, and X-Z, Zhang

Subjects
Male, Rats, Sprague-Dawley, MicroRNAs, Random Allocation, MAP Kinase Signaling System, Myocardial Infarction, Animals, Apoptosis, Rats
Abstract

To study the influence of micro-ribonucleic acid (miR)-34a on myocardial apoptosis in rats with acute myocardial infarction (AMI) through the extracellular signal-regulated kinase 1/2 (ERK1/2) pathway.A total of 24 Sprague-Dawley (SD) rats were randomly divided into sham group (n=12) and model group (n=12). The heart was exposed in the sham group, while the AMI model was established in the model group. After sampling, the morphology of myocardial tissues was observed via hematoxylin-eosin (HE) staining, the expressions of B-cell lymphoma-2 (Bcl-2) and Bcl-2 associated X protein (Bax) were detected via immunohistochemistry, and the protein expression levels of ERK1/2 and phosphorylated ERK1/2 (p-ERK1/2) were detected via Western blotting. Moreover, the expression of miR-34a was detected via quantitative Polymerase Chain Reaction (qPCR), the apoptosis was detected via terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL), and the myocardial injury indexes were detected using a fully-automatic biochemical analyzer.The morphology of myocardial tissues was normal with a complete structure in the sham group, while there was damage to myocardial tissues in different degrees in the model group. The immunohistochemical results revealed that the Bax expression was increased and the Bcl-2 expression was decreased in the model group compared with those in the sham group (p0.05). The results of Western blotting showed that the protein expression levels of both ERK1/2 and p-ERK1/2 were significantly increased in the model group compared with those in the sham group (p0.05). The qPCR results manifested that the expression of miR-34a in the model group markedly declined compared with that in the sham group (p0.05). Besides, the TUNEL detection showed that the apoptosis rate in the model group was remarkably increased compared with that in the sham group (p0.05), and the content of cardiac troponin T and creatine kinase isoenzyme in the model group was significantly higher than that in the sham group ((p0.05).MiR-34a affects the apoptosis in AMI by regulating the ERK1/2 signaling pathway.

Published
2019

21. Characterization of the Hamamatsu VUV4 MPPCs for nEXO

Author

P. Giampa, G. Li, D. Kodroff, M. Wagenpfeil, J. Dalmasson, Eric W. Hoppe, N. Roy, David Leonard, J. Blatchford, Thomas Koffas, E. V. Hansen, W. M. Fairbank, P. Gautam, B. T. Cleveland, K. Odgers, L. Cao, Liang Yang, A. Jamil, S. Rescia, T. Stiegler, E. Raguzin, M. Elbeltagi, R. MacLellan, A. Kuchenkov, Arun Kumar Soma, F. Nolet, X.L. Sun, T. Bhatta, D. Fairbank, J. B. Zhao, T. McElroy, A. Larson, Jean-Francois Pratte, B. Mong, F. Vachon, Marc Weber, G. St-Hilaire, P. Margetak, P. Nakarmi, M. Chiu, J. Farine, J. Echevers, C. Chambers, G. Zhang, M. Oriunno, P. C. Rowson, A. Robinson, I. J. Arnquist, S. X. Wu, Douglas H Beck, Qing Xia, U. Wichoski, Ethan Brown, A. House, K. Murray, Y-R Yen, L. Darroch, G. S. Ortega, R. DeVoe, Gisela Anton, T. Ziegler, O. Zeldovich, J. P. Brodsky, T. I. Totev, M. Heffner, Qun-Yao Wang, T. Tolba, W. R. Cen, S. J. Daugherty, A. De St. Croix, G. Gallina, R. Gornea, Serge A. Charlebois, T. Rossignol, Zhijun Ning, M. Tarka, M. J. Jewell, Lorenzo Fabris, J. L. Vuilleumier, M. Walent, John L. Orrell, T. Daniels, R. Tsang, B. G. Lenardo, T. Brunner, K. Skarpaas, P. Lv, V. Veeraraghavan, A. Karelin, J. Todd, Y. Y. Ding, O. Nusair, R. Krücken, Veljko Radeka, Wei Wu, R.J. Newby, M. Hughes, R. Saldanha, S. Al Kharusi, Giorgio Gratta, Martin Ward, He-Run Yang, David Moore, M. Alfaris, S. Feyzbakhsh, A. Craycraft, Y. Ito, L. J. Kaufman, Y. Lan, Yuehe Lin, Z. Li, Samuele Sangiorgio, Wei Wei, F. Retière, K. S. Kumar, J. Hößl, P. S. Barbeau, V. A. Belov, Thilo Michel, J. Kroeger, Xuan Wu, A. Pocar, A. Piepke, V.N. Stekhanov, D. Qiu, M. Coon, Cory T. Overman, T. Tsang, Angelo Dragone, Gabriele Giacomini, Jens Dilling, I. Badhrees, S. Parent, A. Odian, I. Ostrovskiy, Gerard Visser, Mike Richman, O. Njoya, A. Iverson, Shu Li, J. Watkins, M. Medina-Peregrina, X. S. Jiang, C. Licciardi, A. Der Mesrobian-Kabakian, Yu-Guang Zhou, Liangjian Wen, Luca Doria, Guofu Cao, Rejean Fontaine, and M. J. Dolinski

Subjects
010302 applied physics, Physics, Nuclear and High Energy Physics, Scintillation, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Analytical chemistry, FOS: Physical sciences, chemistry.chemical_element, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Xenon, chemistry, 0103 physical sciences, Saturation (graph theory), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation, Photon detection, Dark current
Abstract

In this paper we report on the characterization of the Hamamatsu VUV4 (S/N: S13370-6152) Vacuum Ultra-Violet (VUV) sensitive Multi-Pixel Photon Counters (MPPC)s as part of the development of a solution for the detection of liquid xenon scintillation light for the nEXO experiment. Various MPPC features, such as: dark noise, gain, correlated avalanches, direct crosstalk and Photon Detection Efficiency (PDE) were measured in a dedicated setup at TRIUMF. MPPCs were characterized in the range 163 K ≤ T ≤ 233 K . At an over voltage of 3 . 1 ± 0 . 2 V and at T = 163 K we report a number of Correlated Avalanches (CAs) per pulse in the 1 μ s interval following the trigger pulse of 0 . 161 ± 0 . 005 . At the same settings the Dark-Noise (DN) rate is 0 . 137 ± 0 . 002 Hz/mm 2 . Both the number of CAs and the DN rate are within nEXO specifications. The PDE of the Hamamatsu VUV4 was measured for two different devices at T = 233 K for a mean wavelength of 189 ± 7 nm . At 3 . 6 ± 0 . 2 V and 3 . 5 ± 0 . 2 V of over voltage we report a PDE of 13 . 4 ± 2 . 6 % and 11 ± 2 % , corresponding to a saturation PDE of 14 . 8 ± 2 . 8 % and 12 . 2 ± 2 . 3 % , respectively. Both values are well below the 24 % saturation PDE advertised by Hamamatsu. More generally, the second device tested at 3 . 5 ± 0 . 2 V of over voltage is below the nEXO PDE requirement. The first one instead yields a PDE that is marginally close to meeting the nEXO specifications. This suggests that with modest improvements the Hamamatsu VUV4 MPPCs could be considered as an alternative to the FBK-LF Silicon Photo-Multipliers for the final design of the nEXO detector.

Published
2019

22. Reflectance of Silicon Photomultipliers at Vacuum Ultraviolet Wavelengths

Author

E. Caden, S. Rescia, D. Fairbank, G. St-Hilaire, Thilo Michel, A. Craycraft, Jens Dilling, I. Badhrees, A. De St. Croix, X. S. Jiang, C. Licciardi, J. Farine, M. Walent, S. Feyzbakhsh, V. Belov, C.R. Natzke, B. G. Lenardo, A. Robinson, P. Nakarmi, A. Der Mesrobian-Kabakian, T. Brunner, L. Darroch, J. Echevers, Xuan Wu, S. Parent, A. Odian, A. Fucarino, Jean-Francois Pratte, Yu-Guang Zhou, E. Raguzin, T. Rossignol, Z. Li, O. Nusair, J. L. Vuilleumier, R. Krücken, M. Hughes, V. Veeraraghavan, M. J. Jewell, R. Saldanha, T. I. Totev, P. A. Breur, K. Skarpaas, Gerard Visser, S. Al Kharusi, I. Ostrovskiy, B. T. Cleveland, A. Kuchenkov, Liangjian Wen, Luca Doria, Guofu Cao, Samuele Sangiorgio, Wei Wei, K. S. Kumar, Mike Richman, David Moore, O. Njoya, A. Iverson, T. Bhatta, M. Chiu, G. S. Li, Thomas Tsang, Shu Li, Y. Lan, B. Chana, Douglas H Beck, L. Yang, M. Oriunno, J. P. Brodsky, P. S. Barbeau, He-Run Yang, R. DeVoe, K. Murray, J. Watkins, M. Tarka, Gisela Anton, R. Tsang, M. L. di Vacri, K. Odgers, M. J. Dolinski, M. Medina-Peregrina, C. Vivo-Vilches, F. Retiere, U. Wichoski, Sergio Ferrara, O. Zeldovich, K. G. Leach, T. Ziegler, R. Gornea, K. Deslandes, David Leonard, Giorgio Gratta, Thomas Koffas, W. M. Fairbank, Wei Wu, R.J. Newby, P. C. Rowson, T. Stiegler, M. Elbeltagi, Lorenzo Fabris, J. Hobl, A. House, N. Roy, L. Cao, F. Nolet, N. Massacret, T. McElroy, S. X. Wu, F. Vachon, C. Chambers, R. MacLellan, A. Pocar, V.N. Stekhanov, P. Gautam, F. Edaltafar, D. Goeldi, M. Coon, I. J. Arnquist, J. Runge, Cory T. Overman, M. Heffner, S. Viel, G. Gallina, Angelo Dragone, Gabriele Giacomini, P. Lv, A. Piepke, J. Todd, Y. Y. Ding, Veljko Radeka, T. Wager, Qun-Yao Wang, Zhijun Ning, E. V. Hansen, A. Jamil, Arun Kumar Soma, Qing Xia, S. Byrne Mamahit, Ethan Brown, A. Karelin, G. S. Ortega, M. Wagenpfeil, J. Dalmasson, X.L. Sun, J. B. Zhao, A. Larson, Serge A. Charlebois, John L. Orrell, T. Daniels, B. Mong, L. J. Kaufman, and Eric W. Hoppe

Subjects
Nuclear and High Energy Physics, Materials science, Physics - Instrumentation and Detectors, Silicon, chemistry.chemical_element, Photodetector, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Xenon, Silicon photomultiplier, 0103 physical sciences, Wafer, Electrical and Electronic Engineering, 010308 nuclear & particles physics, business.industry, Instrumentation and Detectors (physics.ins-det), Nuclear Energy and Engineering, chemistry, Optoelectronics, Diffuse reflection, Photonics, business, Refractive index
Abstract

Characterization of the vacuum ultraviolet (VUV) reflectance of silicon photomultipliers (SiPMs) is important for large-scale SiPM-based photodetector systems. We report the angular dependence of the specular reflectance in a vacuum of SiPMs manufactured by Fondazionc Bruno Kessler (FBK) and Hamamatsu Photonics K.K. (HPK) over wavelengths ranging from 120 nm to 280 nm. Refractive index and extinction coefficient of the thin silicon-dioxide film deposited on the surface of the FBK SiPMs are derived from reflectance data of a FBK silicon wafer with the same deposited oxide film as SiPMs. The diffuse reflectance of SiPMs is also measured at 193 nm. We use the VUV spectral dependence of the optical constants to predict the reflectance of the FBK silicon wafer and FBK SiPMs in liquid xenon.

Published
2019
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23. Simulation of charge readout with segmented tiles in nEXO

Author

F. Retière, M. Medina-Peregrina, Venkatesh Veeraraghavan, J. Hößl, Gerard Visser, J. L. Vuilleumier, L. Darroch, M. Chiu, J. Watkins, V. A. Belov, Yang Haibo, A. De St. Croix, V. Radeka, D. Fairbank, T. McElroy, T. Bhatta, A. Pocar, D. S. Leonard, J. Echevers, E. Caden, A. Craycraft, R. DeVoe, Lorenzo Fabris, C. T. Overman, E. Raguzin, C. Vivo-Vilches, Qing Xia, M. J. Jewell, Xiaoyang Sun, R. Gornea, J. Dalmasson, S. Feyzbakhsh, P. Gautam, G. S. Ortega, A. Piepke, I. Ostrovskiy, P. Lv, M. Hughes, Thilo Michel, T. Ziegler, C.R. Natzke, Z. Ning, Xuan Wu, F. Vachon, Sergio Ferrara, Serge A. Charlebois, S. X. Wu, V.N. Stekhanov, M. Walent, S. Al Kharusi, J. B. Zhao, A. Larson, A. Der Mesrobian-Kabakian, A. E. Robinson, Mike Richman, B. G. Lenardo, T. Brunner, A. Fucarino, David Moore, N. Roy, L. Cao, F. Nolet, J. Todd, M. Heffner, D. Kodroff, T. Tolba, Jean-Francois Pratte, M. Oriunno, John L. Orrell, T. Daniels, B. Mong, Rejean Fontaine, Ethan Brown, Qian Wang, Y. Lan, K. Murray, G. Giacomini, T. Stiegler, O. Njoya, A. Iverson, K. Skarpaas Viii, Thomas Tsang, R. Saldanha, Shu Li, Y. Y. Ding, Z. Li, Gisela Anton, O. Zeldovich, Marc Weber, E. Hansen, A. Karelin, O. Nusair, R. Krücken, Jens Dilling, R. MacLellan, B. Chana, Giorgio Gratta, P. S. Barbeau, Yumei Zhou, I. Badhrees, R. Tsang, Martin Ward, T. I. Totev, D. Goeldi, M. Coon, Liangjian Wen, Douglas H Beck, Guofu Cao, Angelo Dragone, W. R. Cen, S. J. Daugherty, Thomas Koffas, Xiaoshan Jiang, W. M. Fairbank, M. Elbeltagi, Y-R Yen, S. Rescia, M. J. Dolinski, A. Odian, S. Parent, J. Runge, J. P. Brodsky, P. Nakarmi, U. Wichoski, S. Viel, C. Licciardi, G. Gallina, T. Rossignol, M. L. Di Vacri, L. J. Kaufman, Eric W. Hoppe, Liang Yang, A. Jamil, Arun Kumar Soma, Yuehe Lin, Samuele Sangiorgio, Wei Wei, K. S. Kumar, J. Farine, I. J. Arnquist, K. G. Leach, G. St-Hilaire, Wei Wu, R.J. Newby, P. C. Rowson, A. House, M. Tarka, G. Li, B. T. Cleveland, K. Odgers, A. Kuchenkov, M. Wagenpfeil, and C. Chambers

Subjects
Physics, Physics - Instrumentation and Detectors, Time projection chamber, 010308 nuclear & particles physics, Detector, chemistry.chemical_element, FOS: Physical sciences, Charge (physics), Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 030218 nuclear medicine & medical imaging, Anode, Nuclear physics, 03 medical and health sciences, 0302 clinical medicine, Xenon, chemistry, Double beta decay, 0103 physical sciences, Beta (velocity), Sensitivity (control systems), Nuclear Experiment (nucl-ex), Nuclear Experiment, Instrumentation, Mathematical Physics
Abstract

nEXO is a proposed experiment to search for the neutrino-less double beta decay ($0\nu\beta\beta$) of $^{136}$Xe in a tonne-scale liquid xenon time projection chamber (TPC). The nEXO TPC will be equipped with charge collection tiles to form the anode. In this work, the charge reconstruction performance of this anode design is studied with a dedicated simulation package. A multi-variate method and a deep neural network are developed to distinguish simulated $0\nu\beta\beta$ signals from backgrounds arising from trace levels of natural radioactivity in the detector materials. These simulations indicate that the nEXO TPC with charge-collection tiles shows promising capability to discriminate the $0\nu\beta\beta$ signal from backgrounds. The estimated half-life sensitivity for $0\nu\beta\beta$ decay is improved by $\sim$20$~(32)\%$ with the multi-variate~(deep neural network) methods considered here, relative to the sensitivity estimated in the nEXO pre-conceptual design report.

Published
2019
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24. Reflectivity and PDE of VUV4 Hamamatsu SiPMs in Liquid Xenon

Author

Gerard Visser, M. Walent, B. G. Lenardo, T. Brunner, V. Veeraraghavan, T. Bhatta, Giorgio Gratta, F. Edaltafar, T. Rossignol, M. J. Jewell, J. Watkins, P. Nakarmi, Arun Kumar Soma, Ethan Brown, L. Darroch, O. Nusair, R. Krücken, S. X. Wu, David Leonard, J. Blatchford, E. Caden, Thomas Koffas, W. M. Fairbank, T. Stiegler, M. Elbeltagi, L. J. Kaufman, M. Hughes, X. S. Jiang, C. Licciardi, A. Craycraft, Eric W. Hoppe, S. Al Kharusi, A. Karelin, G. Gallina, P. Gautam, R. Saldanha, M. Chiu, J. L. Vuilleumier, T. Wager, A. Der Mesrobian-Kabakian, David Moore, C. Chambers, M. Oriunno, E. V. Hansen, M. Alfaris, M. Wagenpfeil, J. Dalmasson, Sergio Ferrara, R. MacLellan, Qun-Yao Wang, K. Murray, Gabriele Giacomini, I. J. Arnquist, Liang Yang, Y. Lan, U. Wichoski, C.R. Natzke, S. Feyzbakhsh, A. Jamil, Gisela Anton, J. Runge, Zhijun Ning, T. Ziegler, K. G. Leach, R. Tsang, X.L. Sun, J. B. Zhao, M. Heffner, K. Odgers, S. Viel, Wei Wu, R.J. Newby, A. Fucarino, A. Larson, Z. Li, B. Chana, Douglas H Beck, Samuele Sangiorgio, K. S. Kumar, Veljko Radeka, P. C. Rowson, A. House, N. Massacret, Jean-Francois Pratte, P. Lv, J. Todd, Angelo Dragone, B. Mong, Y. Y. Ding, M. Ward, T. I. Totev, G. S. Li, M. L. di Vacri, R. DeVoe, C. Vivo-Vilches, Qing Xia, S. Byrne Mamahit, G. S. Ortega, R. Fontaine, J. Farine, Serge A. Charlebois, John L. Orrell, T. Daniels, V. Belov, A. Robinson, N. Roy, L. Cao, F. Nolet, T. McElroy, F. Vachon, Marc Weber, A. De St. Croix, Lorenzo Fabris, B. T. Cleveland, D. Goeldi, M. Coon, A. Kuchenkov, Cory T. Overman, S. Rescia, D. Fairbank, G. St-Hilaire, J. P. Brodsky, He-Run Yang, A. Piepke, M. Tarka, V.N. Stekhanov, J. Echevers, A. Pocar, O. Zeldovich, Yu-Guang Zhou, Liangjian Wen, Luca Doria, Guofu Cao, Thilo Michel, Wei Wei, I. Ostrovskiy, M. J. Dolinski, E. Raguzin, P. A. Breur, Xuan Wu, Mike Richman, F. Retière, O. Njoya, A. Iverson, M. Medina-Peregrina, J. Hößl, K. Skarpaas Viii, P. S. Barbeau, Thomas Tsang, Shu Li, R. Gornea, Jens Dilling, I. Badhrees, S. Parent, and A. Odian

Subjects
Materials science, Physics - Instrumentation and Detectors, APDS, Physics::Instrumentation and Detectors, Photodetector, chemistry.chemical_element, FOS: Physical sciences, Photodetection, 01 natural sciences, 030218 nuclear medicine & medical imaging, law.invention, High Energy Physics - Experiment, 03 medical and health sciences, High Energy Physics - Experiment (hep-ex), 0302 clinical medicine, Silicon photomultiplier, Optics, Xenon, law, 0103 physical sciences, Specular reflection, Instrumentation, Mathematical Physics, Scintillation, 010308 nuclear & particles physics, business.industry, Instrumentation and Detectors (physics.ins-det), Wavelength, chemistry, business
Abstract

Understanding reflective properties of materials and photodetection efficiency (PDE) of photodetectors is important for optimizing energy resolution and sensitivity of the next generation neutrinoless double beta decay, direct detection dark matter, and neutrino oscillation experiments that will use noble liquid gases, such as nEXO, DARWIN, DarkSide-20k, and DUNE. Little information is currently available about reflectivity and PDE in liquid noble gases, because such measurements are difficult to conduct in a cryogenic environment and at short enough wavelengths. Here we report a measurement of specular reflectivity and relative PDE of Hamamatsu VUV4 silicon photomultipliers (SiPMs) with 50 micrometer micro-cells conducted with xenon scintillation light (~175 nm) in liquid xenon. The specular reflectivity at 15 deg. incidence of three samples of VUV4 SiPMs is found to be 30.4+/-1.4%, 28.6+/-1.3%, and 28.0+/-1.3%, respectively. The PDE at normal incidence differs by +/-8% (standard deviation) among the three devices. The angular dependence of the reflectivity and PDE was also measured for one of the SiPMs. Both the reflectivity and PDE decrease as the angle of incidence increases. This is the first measurement of an angular dependence of PDE and reflectivity of a SiPM in liquid xenon., Comment: 21 pages, 15 figures, 6 tables. As accepted by JINST

Published
2019
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25. Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment

Author

E. V. Hansen, D. Fudenberg, Liang Yang, A. Jamil, M. J. Jewell, L. Darroch, M. Wagenpfeil, Giorgio Gratta, M. J. Dolinski, P. Hufschmidt, David A. Sinclair, G. S. Li, Thilo Michel, D. Fairbank, J. L. Vuilleumier, M. Hughes, T. Bhatta, R. MacLellan, A.C. Odian, I. Ostrovskiy, A. Larson, T. Tolba, P. C. Rowson, C. Jessiman, A. Pocar, C. Licciardi, J. Echevers, B. Mong, O. Ya. Zeldovich, A. Der Mesrobian-Kabakian, R. Neilson, T. Brunner, S. Delaquis, L. J. Kaufman, T. McElroy, David Moore, A. Karelin, A. S. Johnson, J. Watkins, V. Veeraraghavan, L. J. Wen, Marc Weber, Arun Kumar Soma, V.N. Stekhanov, S. X. Wu, D. R. Yahne, C. R. Hall, R. DeVoe, A. Piepke, J. Todd, Martin Breidenbach, David Leonard, S. J. Daugherty, O. Njoya, J. Farine, A. Dolgolenko, A. Craycraft, D. Beck, Thomas Koffas, Qing Xia, D. Tosi, W. M. Fairbank, A. Iverson, C. Chambers, J. Hoessl, P. S. Barbeau, J. Runge, W. R. Cen, R. Gornea, M. Coon, Y-R Yen, Shu Li, S. Schmidt, Guofu Cao, A. Robinson, F. Retiere, V. A. Belov, O. Nusair, R. Krücken, Jens Dilling, B. Veenstra, K. Murray, I. Badhrees, T. I. Totev, P. Gautam, T. Daniels, J. Davis, Gisela Anton, Z. Li, U. Wichoski, T. Ziegler, B. G. Lenardo, Peter Fierlinger, Gerrit Wrede, M. Tarka, B. T. Cleveland, A. Kuchenkov, Y. Lan, S. Feyzbakhsh, Yuehe Lin, and K. S. Kumar

Subjects
Physics, Scintillation, Range (particle radiation), Physics - Instrumentation and Detectors, Photon, Argon, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, Electron, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Xenon, chemistry, Electric field, Ionization, 0103 physical sciences, 010306 general physics
Abstract

Liquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. We use the EXO-200 experimental data to measure the absolute scintillation and ionization yields generated by $\gamma$ interactions from $^{228}$Th (2615~keV), $^{226}$Ra (1764~keV) and $^{60}$Co (1332~keV and 1173~keV) calibration sources, over a range of electric fields. The $W$-value that defines the recombination-independent energy scale is measured to be $11.5~\pm~0.5$~(syst.)~$\pm~0.1$~(stat.) eV. These data are also used to measure the recombination fluctuations in the number of electrons and photons produced by the calibration sources at the MeV-scale, which deviate from extrapolations of lower-energy data. Additionally, a semi-empirical model for the energy resolution of the detector is developed, which is used to constrain the recombination efficiency, i.e., the fraction of recombined electrons that result in the emission of a detectable photon. Detailed measurements of the absolute charge and light yields for MeV-scale electron recoils are important for predicting the performance of future neutrinoless double beta decay detectors.

Published
2019
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26. Correlation of hypertension and F2RL3 gene methylation with Prognosis of coronary heart disease

Author

B F, Gao, Z C, Shen, W S, Bian, S X, Wu, Z X, Kang, and Y, Gao

Subjects
Stroke, Risk Factors, Hypertension, Myocardial Infarction, Humans, Coronary Disease, Receptors, Thrombin, DNA Methylation, Prognosis
Abstract

The aim of this work was to investigate the correlation between methylation of F2RL3 gene and coronary heart disease (CHD) with or without hypertension, secondary cardiovascular events and mortality. Sixty patients with CHD who underwent a cardiovascular rehabilitation program were recruited. Group A included 30 patients with hypertension and CHD, and group B included 30 patients with non-hypertensive CHD, followed-up for more than 8 years. F2RL3 gene methylation was characterized by Sequenom matrix assisted laser desorption ionization time flight mass spectrometry. The correlation between methylation of the F2RL3 gene, hypertension and secondary cardiovascular events and all-cause mortality was analyzed by multivariate Cox, regression models that estimated confounders to control risk ratios. The results showed that during the follow-up, 3 patients in Group A developed non-fatal stroke, 2 patients died of cardiovascular disease, 1 patient died of other causes, and 4 patients in Group B developed non-fatal myocardial infarction. After adjusting for known prognostic factors, Cox model analysis showed that methylation of F2RL3 gene was closely related to hypertension and mortality. After F2RL3 included in the regression model, the correlation between hypertension and all prognostic outcomes increased. In conclusion, the methylation of F2RL3 can affect the prognosis of different types of acute coronary syndrome and is closely related to mortality.

Published
2018

27. The influence of pilot's attention allocation on instrument reading during take-off: The mediating effect of attention span

Author

Zhang Yuting, Tianjiao Lu, Feng Shao, Xufeng Liu, Xiuchao Wang, Zhenfu Liu, and S.-X. Wu

Subjects
Eye Movements, media_common.quotation_subject, 05 social sciences, Eye movement, Physical Therapy, Sports Therapy and Rehabilitation, Human Factors and Ergonomics, 030210 environmental & occupational health, Attention span, Pilots, 03 medical and health sciences, 0302 clinical medicine, Reading, Reading (process), Reaction Time, Humans, 0501 psychology and cognitive sciences, Safety, Risk, Reliability and Quality, Psychology, Engineering (miscellaneous), 050107 human factors, media_common, Cognitive psychology
Abstract

The aim of this study was to examine the relationship among attention span, instrument reading, and eye movement mode. Sixteen pilots participated in procedural tests for attention span and instrument reading ability while completing simulated flight take-offs. Different instrument types corresponded to different reaction times - as response time increased, presentation time decreased. It can also be seen from the attention distribution of the instrument area in take-off that different instruments receive different attention resources. Breadth and attention span not only have a direct impact on the ability to read the table but also have a mediating effect on eye movement pattern during flight. The study found a direct relationship between attention span and instrument reading and also verified the impact of the two on attention allocation during take-off. The results suggest that integration training for attention ability with instrument reading may enable more efficient pilot performance.

Published
2021

28. Synthesis, field emission properties and optical properties of ZnSe nanoflowers

Author

S. Y. Bu, Rujia Zou, P. F. Zhu, X. N. Ye, K. X. Gan, Jia Wei, Shaolin Xue, C. M. Zhang, Pei Xie, Q. Z. Zeng, L. Xie, and S. X. Wu

Subjects
Materials science, Scanning electron microscope, Analytical chemistry, General Physics and Astronomy, 02 engineering and technology, Surfaces and Interfaces, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Nanoclusters, symbols.namesake, Field electron emission, X-ray photoelectron spectroscopy, Transmission electron microscopy, symbols, Nanorod, 0210 nano-technology, Raman spectroscopy, High-resolution transmission electron microscopy
Abstract

ZnSe nanoflowers have been synthesized by reaction of Se powder with Zn substrates at low temperature. The as-prepared ZnSe nanoflowers were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), X-ray energy dispersive spectroscope (EDS) and Raman spectroscopy measurements. It was found that the morphologies of the as-prepared samples highly depended on reaction time. ZnSe nanoclusters and nanoflowers formed at 573 K when the reaction time was 20 and 60 min, respectively. The as-prepared ZnSe nanoflowers were composed of radically aligned ZnSe nanorods with smooth surfaces. The results of XRD, XPS, EDS, TEM and Raman showed that the as-prepared ZnSe nanocrystals were single crystals with cubic zinc blende (ZB) structure. The formation mechanism of the as-prepared ZnSe nanoflowers was also discussed. In addition, the as-prepared ZnSe nanoflowers had excellent electron emission properties. The turn-on field of the as-prepared ZnSe nanoflowers was 3.5 V/μm and the enhancement factor was 3499. The optical properties of the as-prepared ZnSe nanoflowers were also investigated. The results demonstrated that the as-prepared ZnSe nanoflowers were potential candidates for optoelectronic devices.

Published
2016

29. A Preliminary of Dynamic Stability Analysis

Author

Ren Song and S. X. Wu

Subjects
050210 logistics & transportation, Engineering, business.industry, 05 social sciences, Single-mode optical fiber, Stability (learning theory), 02 engineering and technology, 021001 nanoscience & nanotechnology, Dual (category theory), Control theory, 0502 economics and business, 0210 nano-technology, business, Algorithm
Abstract

On account of the traditional method in hybrid stability analysis being too rough, a new method of taking dual or single mode was put forward for 4 typical levers in the hybrid stability analysis respectively and transited to the dynamic analysis smoothly. After verifying the superiority of the method through examples, the broad application prospect would be given in the end.

Published
2016

30. Magnetic properties of Mn2N0.86 (111) thin film grown on MgO (001) substrate by molecular beam epitaxy

Author

Wei Zhou, Gang Wang, Yunjia Wang, S. X. Wu, M. Meng, and S. W. Li

Subjects
Diffraction, Materials science, Mechanical Engineering, 02 engineering and technology, Substrate (electronics), 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Crystallography, Crystallinity, Electron diffraction, Ferromagnetism, Mechanics of Materials, Phase (matter), 0103 physical sciences, General Materials Science, Thin film, 010306 general physics, 0210 nano-technology, Molecular beam epitaxy
Abstract

(111)-oriented Mn 2 N 0.86 thin films were fabricated on (001)-oriented MgO substrates by plasma-assisted molecular beam epitaxy. In-situ reflection high-energy electron diffraction and ex-situ X-ray diffraction results demonstrated that the (111)-oriented Mn 2 N 0.86 thin films were single phase. The rocking curve manifested a very good crystallinity of Mn 2 N 0.86 (111) phase and the thickness of the film was studied by X-ray reflectivity. The magnetic properties of the (111)-oriented Mn 2 N 0.86 thin films were investigated and room-temperature ferromagnetism that was absent in the bulk samples was observed. Strain imposed by the substrates was proposed to explain this phenomenon.

Published
2016

31. MiR-210 protects cardiomyocytes from OGD/R injury by inhibiting E2F3

Author

W-S, Bian, P-X, Shi, X-F, Mi, Y-Y, Sun, D-D, Yang, B-F, Gao, S-X, Wu, and G-C, Fan

Subjects
Oxygen, MicroRNAs, Glucose, E2F3 Transcription Factor, Reperfusion Injury, Humans, Apoptosis, Myocytes, Cardiac, Cell Hypoxia, Cells, Cultured
Abstract

To detect the change in miRNA-210 expression of cardiomyocytes under hypoxia/reoxygenation status. Also, the effect of miR-210 on the apoptosis of cardiomyocytes induced by oxygen-glucose deprivation/reperfusion (OGD/R) and its mechanism through establishing the OGD/R injury model of primary cardiomyocytes in this experiment were investigated.The cell model of OGD/R injury was established. The cell apoptosis in each group was detected by methyl thiazolyl tetrazolium (MTT) assay and detection of Caspase-3 activity. The change in miR-210 expression in each group was detected by Real-time fluorescence quantitative polymerase chain reaction (PCR). The high-expression and low-expression miR-210 models were established through the transient transfection of miR-210 mimic and inhibitor to detect the relevant indexes of cell apoptosis. At the same time, changes in mRNA and protein expressions of E2F3 were detected by RT-PCR and Western blotting, respectively. The E2F3 overexpression vector was constructed, and the overexpression vector plasmid and miR-210 mimic were jointly transfected into the cells to detect the relevant indexes of cell apoptosis.After OGD/R treatment, the activity of Caspase-3 was increased, the survival of cardiomyocytes was significantly inhibited and the expression level of miR-210 was up-regulated in OGD/R injury. Transfection of miR-210 mimic for miR-210 overexpression could alleviate the OGD/R-induced cardiomyocyte injury, while the decrease of miR-210 expression could aggravate the apoptosis of cardiomyocytes. In addition, the high expression of miR-210 could inhibit the protein expression of E2F3, and co-transfection of E2F3 plasmid and miR-210 mimic could reverse the inhibiting effect of miR-210 on the apoptosis of cardiomyocytes.We confirmed that miR-210 can inhibit the OGD/R-induced apoptosis of cardiomyocytes, and miR-210, as an upstream factor, plays a protective role in cardiomyocytes through directly inhibiting the protein expression of its target gene E2F3.

Published
2018

32. Training mode and advantages of American masters in clinical psychology

Author

Xufeng Liu, Hui Wang, S.-X. Wu, and Xiuchao Wang

Subjects
Mode (computer interface), Evaluation methods, General Medicine, Psychology, Training (civil), Clinical psychology
Abstract

This paper makes a systematic introduction to the objective, mode and advantages of the training of American masters in clinical psychology. The advantages are mainly reflected in diversified teaching evaluation methods, emphasizing comprehensive ability cultivation, focusing on the combination with the society, and open and active teaching system. Through the introduction, we hope to provide some references for the training of Chinese masters in clinical psychology.

Published
2018

33. VUV-sensitive Silicon Photomultipliers for Xenon Scintillation Light Detection in nEXO

Author

A. Jamil, T. Ziegler, P. Hufschmidt, G. Li, L. Lupin-Jimenez, T. Michel, I. Ostrovskiy, F. Retiere, J. Schneider, M. Wagenpfeil, A. Alamre, J. B. Albert, G. Anton, I. J. Arnquist, I. Badhrees, P. S. Barbeau, D. Beck, V. Belov, T. Bhatta, F. Bourque, J. P. Brodsky, E. Brown, T. Brunner, A. Burenkov, G. F. Cao, L. Cao, W. R. Cen, C. Chambers, S. A. Charlebois, M. Chiu, B. Cleveland, M. Coon, M. Cote, A. Craycraft, W. Cree, J. Dalmasson, T. Daniels, L. Darroch, S. J. Daugherty, J. Daughhetee, S. Delaquis, A. Der Mesrobian-Kabakian, R. DeVoe, J. Dilling, Y. Y. Ding, M. J. Dolinski, A. Dragone, J. Echevers, L. Fabris, D. Fairbank, W. Fairbank, J. Farine, S. Feyzbakhsh, R. Fontaine, D. Fudenberg, G. Gallina, G. Giacomini, R. Gornea, G. Gratta, E. V. Hansen, D. Harris, M. Hasan, M. Heffner, J. HoBl, E. W. Hoppe, A. House, M. Hughes, Y. Ito, A. Iverson, C. Jessiman, M. J. Jewell, X. S. Jiang, A. Karelin, L. J. Kaufman, T. Koffas, S. Kravitz, R. Krucken, A. Kuchenkov, K. S. Kumar, Y. Lan, A. Larson, D. S. Leonard, S. Li, Z. Li, C. Licciardi, Y. H. Lin, P. Lv, R. MacLellan, B. Mong, D. C. Moore, K. Murray, R. J. Newby, Z. Ning, O. Njoya, F. Nolet, O. Nusair, K. Odgers, A. Odian, M. Oriunno, J. L. Orrell, G. S. Ortega, C. T. Overman, S. Parent, A. Piepke, A. Pocar, J.-F. Pratte, D. Qiu, V. Radeka, E. Raguzin, T. Rao, S. Rescia, A. Robinson, T. Rossignol, P. C. Rowson, N. Roy, R. Saldanha, S. Sangiorgio, S. Schmidt, A. Schubert, D. Sinclair, K. Skarpaas, A. K. Soma, G. St-Hilaire, V. Stekhanov, T. Stiegler, X. L. Sun, M. Tarka, J. Todd, T. Tolba, T. I. Totev, R. Tsang, T. Tsang, F. Vachon, B. Veenstra, V. Veeraraghavan, G. Visser, J.-L. Vuilleumier, Q. Wang, J. Watkins, M. Weber, W. Wei, L. J. Wen, U. Wichoski, G. Wrede, S. X. Wu, W. H. Wu, Q. Xia, L. Yang, Y.-R. Yen, O. Zeldovich, X. Zhang, J. Zhao, and Y. Zhou

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Scintillation, Time projection chamber, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Noble gas, chemistry.chemical_element, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Avalanche photodiode, 01 natural sciences, Optics, Silicon photomultiplier, Xenon, Nuclear Energy and Engineering, chemistry, Double beta decay, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, business
Abstract

Future tonne-scale liquefied noble gas detectors depend on efficient light detection in the VUV range. In the past years Silicon Photomultipliers (SiPMs) have emerged as a valid alternative to standard photomultiplier tubes or large area avalanche photodiodes. The next generation double beta decay experiment, nEXO, with a 5 tonne liquid xenon time projection chamber, will use SiPMs for detecting the $178\,\text{nm}$ xenon scintillation light, in order to achieve an energy resolution of $\sigma / Q_{\beta\beta} = 1\, \%$. This paper presents recent measurements of the VUV-HD generation SiPMs from Fondazione Bruno Kessler in two complementary setups. It includes measurements of the photon detection efficiency with gaseous xenon scintillation light in a vacuum setup and dark measurements in a dry nitrogen gas setup. We report improved photon detection efficiency at $175\,\text{nm}$ compared to previous generation devices, that would meet the criteria of nEXO. Furthermore, we present the projected nEXO detector light collection and energy resolution that could be achieved by using these SiPMs., Comment: 11 pages, 13 figures, 2 tables

Published
2018
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34. An Expansion of Boundary Theory and the Application of Joint Condition

Author

R. Song and S. X. Wu

Subjects
business.industry, Structural stability, Simple (abstract algebra), Boundary theory, Stability (learning theory), Energy method, Structural engineering, Boundary value problem, Axial force, business, Algorithm, Joint (geology), Mathematics
Abstract

The manuscript reviews the history and quo of the theory of Timoshenko’s method in stability analysis of compressive levers first, taking an example to explain the m-simulation method and putting forward the 3rd-7th boundary conditions demonstrating their superiorities in improving the precision through examples, followed by proposing and applying the join conditions in the stability analysis of combined axial force compressive levers gaining success. Through a brief example showing the effect of some related theories in a simple structural stability analysis, its application prospect is discussed.

Published
2015

35. Search for a Higgs boson decaying into two photons in e(+)e(-) interactions at root s=189 GeV

Author

M. Vivargent, D. Piccolo, Vladimir Andreev, R. Ramelli, C. C. Samuel Ting, D.W. Schmitz, P. de Jong, N. Shivarov, R. van Gulik, P. Extermann, Salvatore Mele, Christoph Schäfer, B. Z. Yang, H. Hofer, S. S. Gau, K. L. Tung, Peter Denes, Robert Clare, Lamberto Luminari, Paolo Bagnaia, W. G. Ma, Thomas Hebbeker, G. Ambrosi, M. Rescigno, A. Barczyk, M. Gataullin, T. Sztaricskai, Paul Lecoq, R. W. Kraemer, M. Napolitano, A. Oulianov, C. Palomares, P. Wienemann, Adrian Biland, Egidio Longo, V. Plyaskin, Pierre Lecomte, F. Pierella, Federico Cindolo, A. Stone, Georgi Sultanov, T. S. Dai, R. A. Khan, S. Pensotti, Valery Schegelsky, Antonino Zichichi, C. Dionisi, Nicola Cavallo, H. K. Park, D. Duchesneau, H. S. Chen, L. Servoli, R. Leiste, Christoph Paus, Dimitri Bourilkov, P. Spillantini, Pablo Garcia-Abia, Werner Lustermann, Charles Timmermans, M. Dierckxsens, S. C. Tonwar, H. Rykaczewski, Frank Filthaut, Giovanni Organtini, Alain Hervé, T. Paul, H. Wilkens, G. Castellini, M. Chemarin, A. Bay, Ren-Yuan Zhu, B. Petersen, Thomas Ferguson, A. Malinin, A. Bajo, Alexei Raspereza, M. T. Dova, G. S. Muanza, I. Vodopianov, E. Fiandrini, Igor Vorobiev, J. A. van Dalen, A. Engler, G. M. Chen, G. Forconi, M. Pohl, S. Vlachos, Z. F. Gong, Gyorgy Vesztergombi, Peter Raics, M. Capell, H. S. Fesefeldt, E. Pistolesi, Luca Malgeri, Carlo Civinini, G. Raven, L. Xia, Aaron Dominguez, Jean Fay, M. Aguilar-Benitez, O. Grimm, Felicitas Pauss, Herwig Schopper, M. Pedace, S. C. Blyth, Marco Meschini, J. Rodin, T. Niessen, S. Rosier-Lees, P. Le Coultre, M. Basile, An. Zalite, A. De Salvo, P. Bartalini, A. Krüger, J. G. Branson, Kajari Mazumdar, X. D. Cai, Alessandra Doria, A. Gurtu, S. Villa, P. Duinker, P. Levtchenko, Panos A Razis, Christopher George Tully, S. N. Ganguli, A. Degré, H. Postema, W. J. Burger, Michael Dittmar, M. N. Kienzle-Focacci, A. Seganti, Harvey B Newman, M. Musy, R. Barillère, Jozsef Toth, Claudio Luci, D. Pandoulas, F. C. Erné, Wolfgang Lohmann, H. Vogt, B. Bertucci, F. Anselmo, Nicanor Colino, A. Lebedev, D. Mangeol, D. Luckey, B. Musicar, Roberto Battiston, Gerjan Bobbink, B. Borgia, G. Schwering, A. Csilling, J. Ulbricht, Dong-Chul Son, C. Furetta, M. Lebeau, J.P. Martin, Simonetta Gentile, S. R. Hou, M. Wadhwa, A. Balandras, D. J. Schotanus, K. Freudenreich, B. Tellili, J. Berdugo, J. J. Blaising, Marco Pieri, J. Hirschfelder, Stefano Giagu, J. D. Swain, A. Hasan, Raffaello D'Alessandro, F. Cesaroni, A. Buijs, Leonardo Merola, E. J. Sanchez, Maurizio Biasini, Pierluigi Paolucci, Marta Felcini, Peter H. Fisher, A. Klimentov, L. Lugnier, W. Kittel, I. Clare, G. Cara Romeo, B. P. Roe, S. Reucroft, S. V. Baldew, D. O. Prokofiev, Francesco Becattini, L. Tauscher, X. L. Wang, S. Cucciarelli, M. Pauluzzi, G. Marian, Aleandro Nisati, F. Brochu, C. Maña, D. della Volpe, H. J. Lee, Marcella Diemoz, G. Landi, M. Fabre, Jasper Kirkby, M. A. Falagan, I. Vetlitsky, Giovanni Passaleva, Joseph Quartieri, E. Delmeire, U. K. Chaturvedi, T. Azemoon, M. Zöller, Mingming Yang, H. F. Chen, An.A. Vorobyov, A. Böhm, Simone Paoletti, Y. S. Lu, Riccardo Paramatti, A. Favara, D. Ren, Anna Katharina Kopp, Zheng Wang, H. J. Yang, R. Ofierzynski, P. G. Rancoita, Pàl Hidas, Zhenyu Zhang, A. J.M. Muijs, S. Bhattacharya, L. Baksay, F. Cotorobai, B. De La Cruz, A. Shvorob, R. Ranieri, S. Likhoded, A. Kunin, Marcos Cerrada, B. N. Jin, Manjit Kaur, G. Ruggiero, A. C. Weber, L. Z. Sun, O. Adriani, Z. Szillasi, Hafeez R Hoorani, S. Wynhoff, C-Q. Li, A. Rosca, V. K. Gupta, H. Nowak, G. Chiefari, D. Vicinanza, S. Shevchenko, J. H. Field, Imad Baptiste Laktineh, V. Koutsenko, Lucas Taylor, Francesca Cavallari, M. G. Alviggi, E. Valente, M. E. Sarakinos, F. Behner, Yu. Galaktionov, L. Bellucci, Z. A. Liu, A. Vorvolakos, F. DeNotaristefani, W. J. Metzger, B. Stoyanov, S. Schmidt-Kaerst, T. Angelescu, G. Mirabelli, W. Wallraff, J. Alcaraz, G. Y. Zhu, E. Shumilov, P. Déglon, P. Ladron de Guevara, G. Viertel, S. Banerjee, K. Lübelsmeyer, S. Saremi, J. Casaus, V. Shoutko, K. Sudhakar, Ya Han Hu, D. Haas, Manas Maity, Jeremy Mans, Tariq Aziz, Claudia Cecchi, M. von der Mey, P. Berges, Hans J. Vogel, A. Buffini, A. Mihul, J. B. Ye, G. Alemanni, J. K. Kim, F. L. Linde, C. G. Yang, J. Pothier, Yu. Zalite, M. Acciarri, Guo-Ming Chen, J. M. Le Goff, J. Yamamoto, N. Gheordanescu, W. T. Lin, S. Costantini, S. C. Yeh, J. A. Rubio, A. Chen, D. van Dierendonck, J. Salicio, Crisostomo Sciacca, B. Zimmermann, D. Kiss, Konrad Deiters, G. B. Mohanty, Alberto Aloisio, Ph. Lebrun, X. W. Tang, P. A. Piroué, M. W. Gruenewald, M. Chamizo, I. Josa-Mutuberria, M. Kräber, Dong-Hyun Kim, G. Zilizi, R. Berbeco, A. Arefiev, R. R. McNeil, G. Carlino, G. Holzner, K. Riles, F. Marzano, G. Coignet, W. Krenz, S. X. Wu, Inkyu Park, M. Steuer, M. A. Rahaman, D. Perret-Gallix, D. Prokofiev, Luisa Cifarelli, L. J. Gutay, U. Becker, I. Duran, F. J. Eppling, L. W. Jones, S. M. Ting, J.V. Allaby, S. Patricelli, D. Hatzifotiadou, Laszlo Boldizsar, L. Romero, S. Sarkar, M. Bourquin, G. J. Grenier, Joachim Mnich, P. Achard, H. Milcent, T. Moulik, A. M. Cartacci, A. C. König, D. P. Stickland, Y. H. Chang, Francesca Nessi-Tedaldi, J. D. Burger, T. Siedenburg, G. Rahal-Callot, N. Raja, D. Dufournaud, H. Suter, Ia Iashvili, Z. Z. Xu, C. H. Lin, V. Pojidaev, Y. Uchida, Minhong Wang, M. P. Sanders, B. L. Betev, Speranza Falciano, A. Straessner, Luca Lista, Sabine Riemann, H. Anderhub, Michele Guida, B. Smith, S. Braccini, R. de Asmundis, I. Fisk, H. El Mamouni, Oleg Fedin, Max Weber, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, Achard, Pablo, Ambrosi, Giovanni, Bourquin, Maurice, Braccini, Saverio, Chamizo Llatas, Maria, Deglon, Patrick, Delmeire, Evelyne, Extermann, Pierre, Field, John, Kienzle, Maria-Novella, Pohl, Martin, Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, Alberto, Alviggi, Mariagrazia, Ambrosi, G., Anderhub, H., Andreev, V. P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, L., Balandras, A., Baldew, S. V., Banerjee, S., Barczyk, A., Barillere, R., Bartalini, P., Basile, M., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bellucci, L., Berbeco, R., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Bhattacharya, S., Biasini, M., Biland, A., Blaising, J. J., Blyth, S. C., Bobbink, G. J., Bohm, A., Boldizsar, L., Borgia, B., Bourilkov, D., Bourquin, M., Braccini, S., Branson, J. G., Brochu, F., Buffini, A., Buijs, A., Burger, J. D., Burger, W. J., Cai, X. D., Capell, M., Romeo, G. C., Carlino, G., Cartacci, A. M., Casaus, J., Castellini, G., Cavallari, F., Cavallo, N., Cecchi, C., Cerrada, M., Cesaroni, F., Chamizo, M., Chang, Y. H., Chaturvedi, U. K., Chemarin, M., Chen, A., Chen, G., Chen, G. M., Chen, H. F., Chen, H. S., Chiefari, Giovanni, Cifarelli, L., Cindolo, F., Civinini, C., Clare, I., Clare, R., Coignet, G., Colino, N., Costantini, S., Cotorobai, F., B. d., La, Csilling, A., Cucciarelli, S., Dai, T. S., Van, J. A., D'Alessandro, R., Asmundis, R. d., Deglon, P., Degre, A., Deiters, K., DELLA VOLPE, Domenico, Delmeire, E., Denes, P., Denotaristefani, F., Salvo, A. D., Diemoz, M., Dierckxsens, M., Dierendonck, D. v., Dionisi, C., Dittmar, M., Dominguez, A., Doria, A., Dova, M. T., Duchesneau, D., Dufournaud, D., Duinker, P., Duran, I., Mamouni, H. E., Engler, A., Eppling, F. J., Erne, F. C., Extermann, P., Fabre, M., 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., Fisk, I., Forconi, G., Freudenreich, K., Furetta, C., Galaktionov, Y., Ganguli, S. N., Garcia Abia, P., Gataullin, M., Gau, S. S., Gentile, S., Gheordanescu, N., Giagu, S., Gong, Z. F., Grenier, G., Grimm, O., Gruenewald, M. W., Guida, M., Gulik, R. v., Gupta, V. K., Gurtu, A., Gutay, L. J., Haas, D., Hasan, A., Hatzifotiadou, D., Hebbeker, T., Herve, A., Hidas, P., Hirschfelder, J., Hofer, H., Holzner, G., Hoorani, H., Hou, S. R., Hu, Y., Iashvili, I., Jin, B. N., Jones, L. W., Jong, P. d., Josa Mutuberria, I., Khan, R. A., Kaur, M., Kienzle Focacci, M. N., Kim, D., Kim, J. K., Kirkby, J., Kiss, D., Kittel, W., Klimentov, A., Konig, A. C., Kopp, A., Koutsenko, V., Kraber, M., Kraemer, R. W., Krenz, W., Kruger, A., Kunin, A., P. L., De, Laktineh, I., Landi, G., Lebeau, M., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Coultre, P. L., Lee, H. J., J. M., Le, Leiste, R., Levtchenko, P., Li, C., Likhoded, S., Lin, C. H., Lin, W. T., Linde, F. L., Lista, L., Liu, Z. A., Lohmann, W., Longo, E., Y. S., Lu, Lubelsmeyer, K., Luci, C., Luckey, D., Lugnier, L., Luminari, L., Lustermann, W., W. G., Ma, Maity, M., Malgeri, L., Malinin, A., Mana, C., Mangeol, D., Mans, J., Marian, G., Martin, J. P., Marzano, F., Mazumdar, K., Mcneil, R. R., Mele, S., Merola, Leonardo, Meschini, M., Metzger, W. J., Der, M. v., Mihul, A., Milcent, H., Mirabelli, G., Mnich, J., Mohanty, G. B., Moulik, T., Muanza, G. S., A. J. M., Musicar, B., Musy, M., Napolitano, Marco, Nessi Tedaldi, F., Newman, H., Niessen, T., Nisati, A., Nowak, H., Ofierzynski, R., Organtini, G., Oulianov, A., Palomares, C., Pandoulas, D., Paoletti, S., Paolucci, P., Paramatti, R., Park, H. K., Park, I. H., Passaleva, G., Patricelli, Sergio, Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pedace, M., Pensotti, S., Perret Gallix, D., Petersen, B., Piccolo, D., Pierella, F., Pieri, M., Piroue, P. A., Pistolesi, E., Plyaskin, V., Pohl, M., Pojidaev, V., Postema, H., Pothier, J., Prokofiev, D. O., Prokofiev, D., Quartieri, J., Rahal Callot, G., Rahaman, M. A., Raics, P., Raja, N., Ramelli, R., Rancoita, P. G., Ranieri, R., Raspereza, A., Raven, G., Razis, P., Ren, D., Rescigno, M., Reucroft, S., Riemann, S., Riles, K., Rodin, J., Roe, B. P., Romero, L., Rosca, A., Rosier Lees, S., Rubio, J. A., Ruggiero, G., Rykaczewski, H., Saremi, S., Sarkar, S., Salicio, J., Sanchez, E., Sanders, M. P., Sarakinos, M. E., Schafer, C., Schegelsky, V., Schmidt Kaerst, S., Schmitz, D., Schopper, H., Schotanus, D. J., Schwering, G., Sciacca, Crisostomo, Seganti, A., Servoli, L., Shevchenko, S., Shivarov, N., Shoutko, V., Shumilov, E., Shvorob, A., Siedenburg, T., Son, D., Smith, B., Spillantini, P., Steuer, M., Stickland, D. P., Stone, A., Stoyanov, B., Straessner, A., Sudhakar, K., Sultanov, G., Sun, L. Z., Suter, H., Swain, J. D., Szillasi, Z., Sztaricskai, T., Tang, X. W., Tauscher, L., Taylor, L., Tellili, B., Timmermans, C., S. C. C., Ting, S. M., Tonwar, S. C., Toth, J., Tully, C., Tung, K. L., Uchida, Y., Ulbricht, J., Valente, E., Vesztergombi, G., Vetlitsky, I., Vicinanza, D., Viertel, G., Villa, S., Vivargent, M., Vlachos, S., Vodopianov, I., Vogel, H., Vogt, H., Vorobiev, I., Vorobyov, A. A., Vorvolakos, A., Wadhwa, M., Wallraff, W., Wang, M., Wang, X. L., Wang, Z. M., Weber, A., Weber, M., Wienemann, P., Wilkens, H., S. X., Wu, Wynhoff, S., Xia, L., Z. Z., Xu, Yamamoto, J., Yang, B. Z., Yang, C. G., Yang, H. J., Yang, M., J. B., Ye, Yeh, S. C., Zalite, A., Zalite, Y., Zhang, Z. P., Zhu, G. Y., Zhu, R. Y., Zichichi, A., Zilizi, G., Zimmermann, B., and Zoller, M.

Subjects
COLLISIONS, Z boson, Nuclear and High Energy Physics, Particle physics, Photon, Higgs boson, L3 data collected at LEP, Electron–positron annihilation, STANDARD MODEL, 2 PHOTONS, FOS: Physical sciences, ddc:500.2, 01 natural sciences, 7. Clean energy, Lower limit, High Energy Physics - Experiment, Standard Model, W-PAIR PRODUCTION, Nuclear physics, BHABHA SCATTERING, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, MONTE-CARLO PROGRAM, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], PARTICLES, TEVATRON, 010306 general physics, DETECTOR, Ciencias Exactas, L3 EXPERIMENT, Physics, 010308 nuclear & particles physics, Branching fraction, High Energy Physics::Phenomenology, Física, Function (mathematics), Scalar boson, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

A search is performed for a Higgs boson produced in association with a Z boson and decaying into two photons, using the L3 data collected at LEP at a centre-of-mass energy of 189 GeV. All decay modes of the Z are considered. No signal is observed and limits on the branching fraction of the Higgs boson decay into two photons as a function of the Higgs mass are derived assuming a Standard Model production rate. A lower limit on the mass of a fermiophobic Higgs is set at 94.9 GeV at 95% confidence level., Facultad de Ciencias Exactas

Published
2016

36. Search for the Standard Model Higgs boson in e(+)e(-) collisions at root s up to 202 GeV

Author

G. Forconi, M. Pohl, Yu. Galaktionov, R. Barillère, Jozsef Toth, Claudio Luci, Peter H. Fisher, A. Hervé, D. Pandoulas, J. Alcaraz, M. W. Gruenewald, I. Josa-Mutuberria, A. Bajo, P. G. Rancoita, B. N. Jin, H. Nowak, D. Vicinanza, Riccardo Paramatti, W. Wallraff, S. Banerjee, A. Kunin, M. Kräber, G. Grenier, Egidio Longo, G. Ruggiero, R. Berbeco, W. Kittel, T. Angelescu, Speranza Falciano, J. G. Branson, A. C. Weber, A. Straessner, Dimitri Bourilkov, S. Reucroft, D. Käfer, S. Villa, S. V. Baldew, D. O. Prokofiev, Luca Lista, Hafeez R Hoorani, J. Casaus, S. Sushkov, G. Schwering, Aleandro Nisati, P. Spillantini, S. N. Ganguli, A. Arefiev, J.V. Allaby, S. Patricelli, Francesca Cavallari, A. Mihul, G. Alemanni, Joseph Quartieri, R. R. McNeil, G. Carlino, M. Rescigno, L. Romero, A. Degré, A. Ewers, W. J. Metzger, Sabine Riemann, A. Lebedev, Dong-Chul Son, D. Hatzifotiadou, Laszlo Boldizsar, S. Sarkar, R. Leiste, S. C. Yeh, Christoph Paus, Jasper Kirkby, M. A. Falagan, C. Furetta, J. J. Blaising, B. Petersen, M. Zöller, E. Fiandrini, Gyorgy Vesztergombi, Luca Malgeri, M. Bourquin, F. Cesaroni, C. G. Yang, J. Pothier, Yu. Zalite, M. Fabre, K. Sudhakar, J. Hirschfelder, G. Holzner, Stefano Giagu, K. Riles, Anna Katharina Kopp, L. Lugnier, Mingming Yang, M. von der Mey, P. Achard, Y. Uchida, J. P. Martin, D. Haas, J. B. Ye, F. Cindolo, C. Rosenbleck, F. Marzano, G. Coignet, W. Krenz, Maria-Teresa Dova, Raffaello D'Alessandro, Minhong Wang, M. P. Sanders, T. Sztaricskai, B. L. Betev, G. Y. Zhu, E. Shumilov, G. Ambrosi, F. L. Linde, G. Mirabelli, J. K. Kim, I. Vetlitsky, Francesca Nessi-Tedaldi, G. Cara Romeo, B. P. Roe, Marco Pieri, B. Roux, A. Barczyk, V. Plyaskin, Leonardo Merola, V. Shoutko, J. D. Burger, T. Siedenburg, G. Rahal-Callot, A. De Salvo, P. Wienemann, J. Mnich, Georgi Sultanov, S. X. Wu, T. S. Dai, R. A. Khan, P. Bartalini, M. N. Kienzle-Focacci, Pierluigi Paolucci, N. Raja, Adrian Biland, Claudia Cecchi, A. Csilling, Alexei Raspereza, L. Tauscher, A. M. Cartacci, A. C. König, M. Kopal, Inkyu Park, An. Zalite, K. Lübelsmeyer, M. Steuer, H. Suter, Ia Iashvili, G. Marian, V. P. Andreev, R. Ramelli, C-Q. Li, V. K. Gupta, M. Lebeau, S. Pensotti, Valery Schegelsky, Antonino Zichichi, D. Prokofiev, Luisa Cifarelli, M. A. Rahaman, X. L. Wang, D. Perret-Gallix, M. Chemarin, Giovanni Passaleva, T. Azemoon, A. Favara, G. M. Chen, F. DeNotaristefani, H. Rykaczewski, Giovanni Organtini, Zheng Wang, I. Vodopianov, A. Engler, D. Dufournaud, M. Pauluzzi, H. Milcent, A. Buffini, Zhenyu Zhang, F. Brochu, D. della Volpe, L. Baksay, Aaron Dominguez, L. J. Gutay, H. Wilkens, M. Capell, U. Becker, Marcos Cerrada, Felicitas Pauss, F. C. Erné, A. Krüger, Z. Z. Xu, C. H. Lin, V. Pojidaev, H. S. Fesefeldt, E. Pistolesi, A. Rosca, T. Moulik, A. Seganti, Harvey B Newman, M. Musy, Roberto Battiston, D. Ren, Ya Han Hu, G. S. Muanza, S. Rosier-Lees, Z. A. Liu, P. Le Coultre, M. Basile, D. P. Stickland, Y. H. Chang, Manas Maity, A. Vorvolakos, Lamberto Luminari, R. van Gulik, P. Berges, P. Extermann, Z. Szillasi, Salvatore Mele, Christoph Schäfer, B. Z. Yang, P. Ladron de Guevara, F. J. Eppling, L. W. Jones, Gerjan Bobbink, B. Borgia, S. M. Ting, Jean Fay, D. Mangeol, J. A. van Dalen, S. Saremi, M. Vivargent, D. Piccolo, Maurizio Biasini, J. Ulbricht, Igor Vorobiev, V. Koutsenko, D.W. Schmitz, H. Hofer, P. de Jong, N. Shivarov, D. Luckey, Robert Clare, W. G. Ma, P. Levtchenko, Stefan Roth, Marta Felcini, Panos A Razis, P. Lebrun, Francesco Becattini, Thomas Hebbeker, K. Freudenreich, Paul Lecoq, R. W. Kraemer, B. Tellili, K. L. Tung, Nicola Cavallo, Pierre Lecomte, Jeremy Mans, H. J. Yang, J. M. Le Goff, J. Yamamoto, N. Gheordanescu, R. Ofierzynski, Werner Lustermann, Charles Timmermans, M. Dierckxsens, An.A. Vorobyov, M. Napolitano, H. F. Chen, S. Likhoded, I. Clare, A. Malinin, S. Wynhoff, J. A. Rubio, Simonetta Gentile, A. Balandras, N. Batalova, H. K. Park, M. Acciarri, J. Berdugo, G. Castellini, E. J. Sanchez, Guo-Ming Chen, D. Duchesneau, H. S. Chen, Peter Denes, Peter Raics, L. Servoli, Kajari Mazumdar, X. D. Cai, O. Adriani, Imad Baptiste Laktineh, A. Chen, Z. F. Gong, S. C. Blyth, Marco Meschini, A. Oulianov, C. Palomares, Lucas Taylor, D. van Dierendonck, G. Chiefari, J. Salicio, M. G. Alviggi, S. Cucciarelli, C. Maña, S. Shevchenko, Christopher George Tully, F. Behner, Wolfgang Lohmann, H. Vogt, B. Bertucci, A. Buijs, F. Anselmo, Nicanor Colino, E. Delmeire, F. Pierella, U. K. Chaturvedi, Y. S. Lu, S. C. Tonwar, Frank Filthaut, Alessandra Doria, Thomas Ferguson, A. Shvorob, R. Ranieri, J. H. Field, S. R. Hou, B. Stoyanov, S. Schmidt-Kaerst, M. Wadhwa, D. J. Schotanus, Ren-Yuan Zhu, M. Pedace, G. Landi, Simone Paoletti, A. Gurtu, T. Paul, A. J.M. Muijs, Manjit Kaur, A. Hasan, S. Vlachos, J. Rodin, T. Niessen, E. Valente, G. Viertel, Hans J. Vogel, W. T. Lin, S. Costantini, B. Musicar, H. J. Lee, Marcella Diemoz, P. Bagnaia, C. Dionisi, Pablo Garcia-Abia, A. Bay, B. De La Cruz, Carlo Civinini, G. Raven, L. Xia, D. Kiss, Tariq Aziz, D. Teyssier, M. Aguilar-Benitez, O. Grimm, F. Cotorobai, Herwig Schopper, Crisostomo Sciacca, P. Déglon, B. Zimmermann, Konrad Deiters, G. B. Mohanty, H. Postema, Alberto Aloisio, X. W. Tang, Pàl Hidas, P. A. Piroué, M. Chamizo, S. Bhattacharya, Samuel C.C. Ting, P. Duinker, H. El Mamouni, L. Z. Sun, A. Klimentov, Dong-Hyun Kim, G. Zilizi, L. Bellucci, S. S. Gau, M. Gataullin, A. Stone, Oleg Fedin, Max Weber, H. Anderhub, Michele Guida, B. Smith, S. Braccini, R. de Asmundis, I. Fisk, W. J. Burger, Michael Dittmar, J. D. Swain, A. Böhm, Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, Alberto, Alviggi, Mariagrazia, Ambrosi, G., Anderhub, H., Andreev, V. P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, L., Balandras, A., Baldew, S. 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Y., Zichichi, A., Zilizi, G., Zimmermann, B., Zoller, M., Achard, Pablo, Ambrosi, Giovanni, Bourquin, Maurice, Braccini, Saverio, Chamizo Llatas, Maria, Deglon, Patrick, Delmeire, Evelyne, Extermann, Pierre, Field, John, Kienzle, Maria-Novella, Malgeri, Luca, and Pohl, Martin

Subjects
Nuclear and High Energy Physics, Particle physics, ENERGIES, Electron–positron annihilation, FOS: Physical sciences, Cosmic ray, Elementary particle, ddc:500.2, Standard Model Higgs boson, Lower limit, High Energy Physics - Experiment, Standard Model, CROSS-SECTIONS, Nuclear physics, High Energy Physics - Experiment (hep-ex), MUON DETECTOR, cosmic rays, MONTE-CARLO PROGRAM, CALORIMETER, Ciencias Exactas, L3 EXPERIMENT, Physics, CONSTRUCTION, High Energy Physics::Phenomenology, Física, LEP, L3 detector, Higgs boson, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

The Standard Model Higgs boson is searched for in 233.2 pb−1 of data collected by the L3 detector at centre of mass energies from 192 GeV to 202 GeV. These data are consistent with the expectations of Standard Model processes and no evidence of a Higgs signal is observed. A lower limit on the mass of the Standard Model Higgs boson of 107.0 GeV is set at the 95% confidence level., Facultad de Ciencias Exactas

Published
2016

37. AN S-MATRIX ANALYSIS OF THE Z-RESONANCE

Author

D. McNally, R. Fabbretti, Stefan Kirsch, G. Viertel, F. J. Rodriguez, H. R. Gustafson, H. El Mamouni, S. Morganti, G. M. Bilei, D. Antreasyan, Andrea Contin, I. Bechtluft, F. Cesaroni, Luca Lista, J. Schwenke, S. Easo, An.A. Vorobyov, D. Fernandez, X. Y. Cui, M. Gruenewald, Qi An, P. Arce, V. Plyaskin, J. Y. Liao, S. Patricelli, L. Martinez-Laso, D. Goujon, J. M. Ma, Yanwen Liu, Q. Ye, P. Kapinos, O. Adriani, Egidio Longo, A. Kasser, Lucas Taylor, F. C. Erné, Roberto Castello, P. Duinker, C. Warner, A. Atamanchuk, C. Dionisi, Pablo Garcia-Abia, Alain Hervé, Emilio Leonardi, Simonetta Gentile, Sabine Riemann, Vincenzo Innocente, L. Fredj, S. Pensotti, Valery Schegelsky, Antonino Zichichi, Ph Fisher, H. Rykaczewski, Guofan Hu, Giovanni Organtini, K. N. Qureshi, S. Goldfarb, A. Klimentov, P. Schmitz, P. Vikas, G. Tsipolitis, Georgi Sultanov, T. S. Dai, R. A. Khan, V. R. Krastev, M. T. Dova, V. P. Andreev, O. Rind, M. Chemarin, R. Bock, G. M. Chen, A. Sopczak, U. K. Chaturvedi, Maurizio Biasini, A. Bay, Samuel C.C. Ting, Marta Felcini, M. Bosetti, T. E. Coan, J. G. Branson, Kenneth Francis Read, L. Djambazov, Y. Karyotakis, K. Freudenreich, L. Z. Sun, Y. S. Lu, H. O. Cohn, M. M. Ilyas, A. Gougas, D. Hauschildt, Davide Piccolo, Lamberto Luminari, M. Vivargent, M. Sachwitz, Francesco Becattini, X. R. Shi, Z. W. Yin, Felicitas Pauss, K. Sudhakar, G. Passaleva, Carlo Civinini, M. Maolinbay, G. Raven, M. Aguilar-Benitez, M. S. Sarakinos, L. J. Gutay, A. Degré, S. Chung, P.V.K.S. Baba, Attilio Santocchia, Jean Fay, M. Dhina, F. Cotorobai, X. T. Cui, S. Rosier-Lees, P. Le Coultre, K. Hangarter, J. K. Kim, R. Starosta, D. Luckey, Gy L. Bencze, Y. J. Pei, Reinhard W. Schulte, Konrad Deiters, Raffaello D'Alessandro, M. Möller, N. Zaitsev, U. Becker, D. Gele, Jianming Qian, T. Angelescu, G. Hu, H. Anderhub, A. Krivshich, J. B. Ye, I. Duran, L. Romero, C. Maña, I. C. Brock, Herwig Schopper, M. Rattaggi, H. Postema, M. White, J. H. Field, C. Y. Chien, C. Leggett, Z. Y. Lin, Alberto Aloisio, A. Ricker, H. Kuijten, R. Barillère, S. N. Ganguli, E. Gonzalez, Steven Ahlen, Leonardo Merola, Yu. Kamyshkov, J. Mnich, A. Kirkby, Carlos Willmott, F. J. Eppling, G. J. Zhou, L. W. Jones, D. S. Yan, S. M. Ting, Speranza Falciano, G. B. Mills, A. Lebedev, Dong-Chul Son, T. Kramer, K. Mazumdar, J. J. Blaising, H. F. Chen, M. Guanziroli, F. Ferroni, Marcella Diemoz, E. Dénes, R. Sehgal, A. Buytenhuijs, Giovanni Ambrosi, M. N. Kienzle-Focacci, M. MacDermott, R. Rosmalen, Stefano Giagu, H. T. Li, R. Leiste, Christoph Paus, T. Azemoon, A. Rubbia, X. W. Tang, S. X. Wu, C. G. Yang, W. Friebel, P. Zemp, K. S. Kumar, J. G. Xu, M. Fukushima, R. de Asmundis, Wt Lin, B. L. Betev, Y. Zeng, J. P. Martin, A. Tsaregorodtsev, Bolek Wyslouch, S. Wynhoff, A. Nippe, D. Duchesneau, M. Wadhwa, S. C. Tonwar, K. Y. Lee, Frank Filthaut, B. P. Roe, C. Wang, Thomas Ferguson, D. Z. Shen, Chenjie Gu, C. F. He, Alexander Malinin, B. Monteleoni, I. Sheer, P. A. Piroué, B. Zhou, Elisabetta Gallo, P. Marchesini, D. DiBitonto, Ph. Rosselet, M. Steuer, G. Forconi, Yuehong Xie, G. Chiefari, S. Shevchenko, M. A. Niaz, A. Bujak, Oliver Kornadt, M. Pohl, Mariagrazia Alviggi, B. C.C. van der Zwaan, C. Neyer, I. Vetlitsky, W. van Rossum, P. G. Rancoita, Pierluigi Paolucci, M. Gailloud, R. C. Ball, G. Sartorelli, X. L. Wang, F. Behner, T. Paul, Marcos Cerrada, Y. Mi, J. A. Bakken, Y. F. Wang, M. Sassowsky, J. Bao, E. Shumilov, V. Shoutko, B. C. Riemers, Axel König, F. Sticozzi, B. N. Jin, J. Weber, W. Y. Chen, Ren-Yuan Zhu, Luciano Barone, W. Kittel, T. J. Wenaus, Werner Lustermann, A. Pevsner, M. Lenti, Stefan Roth, A. Nadtochy, C. Spartiotis, J. M. Le Goff, M. Bourquin, K. Strauch, Andrea Baschirotto, Adrian Biland, Chenliang Wang, D. H. Wright, Ming Zeng, N. Gheordanescu, Z. M. Wang, A. A. Syed, P. Extermann, P. Lecomte, H. Nowak, I. Leedom, B. Z. Yang, M. Caria, M. Tonutti, Yu. Galaktionov, G. Schwering, M. Rescigno, D. Perret-Gallix, G. Terzi, G. S. Sanders, S. J. Fan, A. M. Cartacci, R. Raghavan, Laurent Vuilleumier, M. Röhner, P. G. Seiler, G. Fernandex, S. Reucroft, F. Wittgenstein, S. Shotkin, L. Ludovici, E. Drago, B.C. Stringfellow, H. Hofer, K. L. Tung, J. A. Rubio, F. Plasil, Mingshui Chen, A. Koulbardis, J. Alcaraz, J. S. Lee, G. F. Susinno, A. Arefiev, M. Yzerman, A. Gurtu, Els Koffeman, M. Fabre, M. Schneegans, D. M. Lee, Dimitri Bourilkov, L. Antonov, R. Morand, Z. L. Xue, W. Wallraff, H. A. Rizvi, N. Yunus, G. Carlino, A. Marin, A. Kunin, M. Pauluzzi, Jun Guo, H. R. Dimitrov, O. Fackler, H. J. Schreiber, S. Banerjee, A. Engler, V. Koutsenko, J. M. Salicio, N. E. Moulai, Hafeez R Hoorani, E. Fiandrini, Zp Zhang, Helmut Vogel, Howard A. Stone, V. K. Gupta, B. Lindemann, L. Urbán, M. Capell, D. Boutigny, J. C. Sens, R. T. Van de Walle, Y. G. Kim, G. Finocchiaro, V. Pojidaec, R. Mount, Marcel Merk, A. C. Weber, G. Gratta, M. T. Choi, Cheng Chen, A. Mihul, E. Brambilla, B. Hartmann, Tariq Aziz, A. Hasan, D. Ren, H. S. Fesefeldt, W. J. Metzger, S. Ro, R. Bizzarri, F. DeNotaristefani, Roberto Battiston, K. Riles, J. Perrier, Z. Z. Xu, J. Wenninger, F. Marzano, Y. H. Chang, I. Scott, George Alverson, Francesca Nessi-Tedaldi, J. S. Kapustinsky, R. Malik, J. D. Burger, W. J. Burger, J. Shukla, C. Zaccardelli, G. Coignet, W. Krenz, U. Vikas, Peter Denes, G. Sauvage, Z. D. Qi, J. T. He, Gerjan Bobbink, B. Borgia, S. Khokhar, T.R. McMahon, S. Müller, F. L. Linde, R. Weill, G. Rahal-Callot, Z. F. Gong, J. M. Lubbers, W. W. Kinnison, S. C. Yeh, J. Behrens, P. J. Li, Paolo Bagnaia, J. Ulbricht, David Stickland, P. Berges, Marco Meschini, Crisostomo Sciacca, P. Lebrun, R. Klöckner, D. Kirkby, Harvey B Newman, K. Hilgers, Xd Cai, Zhuoxiang Ren, E. Nagy, R. Becker, A. L. Anderson, D. J. Schotanus, J. M. You, Marco Pieri, K. Schultze, H. Suter, BT Bouwens, F. Marion, G. A. Yang, Igor Vorobiev, G. Mirabelli, D. Lanske, M. Hebert, Christopher George Tully, Guo-Ming Chen, Panos A Razis, V. Soulimov, J. F. Zhou, I. Clare, J. Busenitz, Wolfgang Lohmann, H. Vogt, U. Uwer, A. Chen, B. Bertucci, S. C. Kim, J. Salicio, Nicanor Colino, S. Schulte, K. Lübelsmeyer, Piero Spillantini, J. Tóth, Y. Mir, C. H. Ye, D. Pandoulas, T. Spickermann, Michael Dittmar, Bernard Ille, K. Janssen, Stéphane Jézéquel, J. D. Swain, P. McBride, A. Böhm, J. Berdugo, S. Lanzano, D.W. Schmitz, G. Pascale, G.G.G. Massaro, Claudio Luci, Robert Clare, W. G. Ma, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, M. Napolitano, I. Josa-Mutuberria, H. S. Chen, L. Servoli, Shu Li, G. Landi, M. L. Brooks, Simone Paoletti, Manjit Kaur, Daqiang Zhang, E. Valente, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Aloisio, Alberto, Alverson, G., Alviggi, Mariagrazia, Ambrosi, G., An, Q., Anderhub, H., Anderson, A. 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Subjects
Z boson, Nuclear and High Energy Physics, Particle physics, E+E ANNIHILATION, FERMION PAIR PRODUCTION, Electron–positron annihilation, QED CORRECTIONS, 01 natural sciences, Nuclear physics, ASYMMETRIES, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Ciencias Exactas, S-matrix, Ansatz, Physics, Annihilation, 010308 nuclear & particles physics, Física, Polarization (waves), Helicity, S matrix, Z-PEAK, Amplitude, Z-LINE-SHAPE, High Energy Physics::Experiment, Particle Physics - Experiment, Lepton
Abstract

The S matrix ansatz is a rigorously model independent approach to describe the cross-sections and asymmetries in e+e- annihilation. Using the cross-sections and asymmetries measured with the L3 detector during the 1990 and 1991 running period, we determine the mass and the width of the Z boson, the contributions of the Z exchange and of the yZ interference. Including the polarization of the t lepton in the analysis, the leptonic helicity amplitudes of the scattering process are determined assuming lepton universality. The results are compared with other model independent ansatzes as realized in ZFITTER. A systematic bias of the Z mass due to the yZ interference term is detected, which leads to an underestimation of the error on mz for model independent determinations., Facultad de Ciencias Exactas

Published
2016

38. Measurement of the W+W-gamma cross section and direct limits on anomalous quartic gauge boson couplings at LEP

Author

Yu. Galaktionov, F. Cesaroni, Peter H. Fisher, Egidio Longo, Lamberto Luminari, H. F. Chen, Riccardo Paramatti, A. Kunin, S. Pensotti, Valery Schegelsky, Antonino Zichichi, Hafeez R Hoorani, S. X. Wu, W. J. Metzger, E. Delmeire, H. Rykaczewski, J. Alcaraz, D. Haas, Giovanni Organtini, U. K. Chaturvedi, H. Wilkens, G. S. Muanza, Jean Fay, Maurizio Biasini, Marta Felcini, Y. S. Lu, Nicola Cavallo, H. K. Park, F. Pierella, M. Vivargent, D. Piccolo, Federico Cindolo, A. Buijs, Inkyu Park, H. El Mamouni, A. Shvorob, R. Ranieri, C. Dionisi, Francesco Becattini, Aleandro Nisati, Speranza Falciano, G. Castellini, A. Straessner, Pablo Garcia-Abia, Pierre Lecomte, G. Chiefari, S. Shevchenko, Joseph Quartieri, G. Forconi, H. Milcent, M. Pohl, Alain Hervé, A. Lebedev, Dong-Chul Son, M. Steuer, J. H. Field, L. Baksay, F. Cotorobai, P. G. Rancoita, T. Angelescu, Luca Lista, Z. F. Gong, S. C. Tonwar, Frank Filthaut, H. J. Yang, Werner Lustermann, Charles Timmermans, M. Dierckxsens, A. Malinin, B. Stoyanov, G. Ruggiero, B. N. Jin, H. Nowak, Roberto Battiston, Jozsef Toth, Claudio Luci, D. Pandoulas, J. J. Blaising, J. Hirschfelder, T. Moulik, Stefano Giagu, A. C. Weber, S. Schmidt-Kaerst, J. Casaus, A. Bay, A. Mihul, Carlo Civinini, G. Raven, L. Xia, G. Alemanni, R. Ofierzynski, D. Vicinanza, D. Prokofiev, S. Likhoded, F. Behner, Oleg Fedin, Gerjan Bobbink, Luisa Cifarelli, W. Kittel, Marco Pieri, Pierluigi Paolucci, C. C. Samuel Ting, M. A. Rahaman, D. Perret-Gallix, M. Aguilar-Benitez, Mariagrazia Alviggi, B. Borgia, D. P. Stickland, Y. H. Chang, J. Ulbricht, O. Grimm, Herwig Schopper, S. C. Yeh, S. Wynhoff, Jeremy Mans, Thomas Ferguson, Sabine Riemann, Alessandra Doria, G. Mirabelli, R. van Gulik, Igor Vorobiev, W. Wallraff, Max Weber, C. G. Yang, P. Extermann, Salvatore Mele, I. Vetlitsky, H. Postema, G. Ambrosi, L. Romero, S. Reucroft, B. Tellili, M. Acciarri, Guo-Ming Chen, R. Ramelli, Peter Raics, Vladimir Andreev, J. Pothier, Yu. Zalite, A. M. Cartacci, A. C. König, K. 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R., Mele, S., Merola, Leonardo, Meschini, M., Metzger, W. J., Der, M. v., Mihul, A., Milcent, H., Mirabelli, G., Mnich, J., Mohanty, G. B., Moulik, T., Muanza, G. S., A. J. M., Musicar, B., Musy, M., Napolitano, Marco, Nessi Tedaldi, F., Newman, H., Niessen, T., Nisati, A., Nowak, H., Ofierzynski, R., Organtini, G., Oulianov, A., Palomares, C., Pandoulas, D., Paoletti, S., Paolucci, P., Paramatti, R., Park, H. K., Park, I. H., Passaleva, G., Patricelli, Sergio, Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pedace, M., Pensotti, S., Perret Gallix, D., Petersen, B., Piccolo, D., Pierella, F., Pieri, M., Piroue, P. A., Pistolesi, E., Plyaskin, V., Pohl, M., Pojidaev, V., Postema, H., Pothier, J., Prokofiev, D. O., Prokofiev, D., Quartieri, J., Rahal Callot, G., Rahaman, M. A., Raics, P., Raja, N., Ramelli, R., Rancoita, P. G., Ranieri, R., Raspereza, A., Raven, G., Razis, P., Ren, D., Rescigno, M., Reucroft, S., Riemann, S., Riles, K., Rodin, J., Roe, B. P., Romero, L., Rosca, A., Rosier Lees, S., Rubio, J. A., Ruggiero, G., Rykaczewski, H., Saremi, S., Sarkar, S., Salicio, J., Sanchez, E., Sanders, M. P., Sarakinos, M. E., Schafer, C., Schegelsky, V., Schmidt Kaerst, S., Schmitz, D., Schopper, H., Schotanus, D. J., Schwering, G., Sciacca, Crisostomo, Seganti, A., Servoli, L., Shevchenko, S., Shivarov, N., Shoutko, V., Shumilov, E., Shvorob, A., Siedenburg, T., Son, D., Smith, B., Spillantini, P., Steuer, M., Stickland, D. P., Stone, A., Stoyanov, B., Straessner, A., Sudhakar, K., Sultanov, G., Sun, L. Z., Suter, H., Swain, J. D., Szillasi, Z., Sztaricskai, T., Tang, X. W., Tauscher, L., Taylor, L., Tellili, B., Timmermans, C., S. C. C., Ting, S. M., Tonwar, S. C., Toth, J., Tully, C., Tung, K. L., Uchida, Y., Ulbricht, J., Valente, E., Vesztergombi, G., Vetlitsky, I., Vicinanza, D., Viertel, G., Villa, S., Violini, P., Vivargent, M., Vlachos, S., Vodopianov, I., Vogel, H., Vogt, H., Vorobiev, I., Vorobyov, A. A., Vorvolakos, A., Wadhwa, M., Wallraff, W., Wang, M., Wang, X. L., Wang, Z. M., Weber, A., Weber, M., Wienemann, P., Wilkens, H., S. X., Wu, Wynhoff, S., Xia, L., Z. Z., Xu, Yamamoto, J., Yang, B. Z., Yang, C. G., Yang, H. J., Yang, M., J. B., Ye, Yeh, S. C., Zalite, A., Zalite, Y., Zhang, Z. P., Zhu, G. Y., Zhu, R. Y., Zichichi, A., Zilizi, G., Zimmermann, B., Zoller, M., Achard, Pablo, Ambrosi, Giovanni, Bourquin, Maurice, Braccini, Saverio, Chamizo Llatas, Maria, Deglon, Patrick, Delmeire, Evelyne, Extermann, Pierre, Field, John, Kienzle, Maria-Novella, Pohl, Martin, and IHEF (IoP, FNWI)

Subjects
Nuclear and High Energy Physics, Photon, PAIR PRODUCTION, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, ddc:500.2, 01 natural sciences, 7. Clean energy, Standard Model, High Energy Physics - Experiment, Nuclear physics, Cross section (physics), High Energy Physics - Experiment (hep-ex), MUON DETECTOR, Quartic function, 0103 physical sciences, MONTE-CARLO PROGRAM, CALORIMETER, 010306 general physics, Ciencias Exactas, L3 EXPERIMENT, Physics, Gauge boson, Luminosity (scattering theory), CONSTRUCTION, 010308 nuclear & particles physics, Física, LEP, COLLIDERS, L3 detector, SINGLE, MISSING ENERGY, High Energy Physics::Experiment
Abstract

The process eqeyaWqWyg is analysed using the data collected with the L3 detector at LEP at a centre-of-mass energy of 188.6 GeV, corresponding to an integrated luminosity of 176.8 pby1 . Based on a sample of 42 selected WqWy candidates containing an isolated hard photon, the WqWyg cross section, defined within phase-space cuts, is measured to q y be: s WW s290"80"16 fb, consistent with the Standard Model expectation. Including the process e e anngg, limits g are derived on anomalous contributions to the Standard Model quartic vertices WqWygg and WqWyZg at 95% CL: y0.043 GeVy2-a rL2-0.043 GeVy2 , y0.08 GeVy2-a rL2-0.13 GeVy2 , y0.41 GeVy2-a rL2-0.37 GeVy2, Facultad de Ciencias Exactas

Published
2016

39. QCD studies in e(+)e(-) annihilation from 30 GeV to 189 GeV

Author

M. Vivargent, D. Piccolo, Ren-Yuan Zhu, Luciano Barone, A. Barczyk, Adrian Biland, M. Pedace, C. Dionisi, Vladimir Andreev, S. C. Blyth, Marco Meschini, G. Landi, D. Ruschmeier, Christopher George Tully, Wolfgang Lohmann, H. Vogt, B. Bertucci, F. Anselmo, Simone Paoletti, Nicanor Colino, R. Leiste, Christoph Paus, S. X. Wu, A. Gurtu, P. G. Rancoita, Peter Denes, G. Viertel, Paolo Bagnaia, Pablo Garcia-Abia, F. Pierella, Federico Cindolo, S. C. Tonwar, Inkyu Park, A. Favara, H. Nowak, Frank Filthaut, Thomas Ferguson, Helmut Vogel, A. J.M. Muijs, M. N. Kienzle-Focacci, D. Vicinanza, Manjit Kaur, Alain Hervé, Lamberto Luminari, Peter H. Fisher, G. Forconi, Yu. Galaktionov, C-Q. Li, A. Hasan, V. K. Gupta, A. Csilling, Zheng Wang, Zhenyu Zhang, J. Alcaraz, Aleandro Nisati, W. Wallraff, Jozsef Toth, Claudio Luci, D. Pandoulas, Speranza Falciano, Peter Raics, A. Straessner, Luca Lista, S. Costantini, I. Vodopianov, A. Engler, M. Capell, R. Barillère, A. Rosca, M. E. Sarakinos, Joseph Quartieri, S. Banerjee, Kajari Mazumdar, M. Steuer, M. A. Rahaman, D. Perret-Gallix, Marco Pieri, H. S. Fesefeldt, E. Pistolesi, Pierre Lecomte, A. Buijs, H. El Mamouni, F. Di Lodovico, X. D. Cai, Jeremy Mans, A. Bay, Pierluigi Paolucci, Carlo Civinini, M. Rescigno, C. C. Samuel Ting, A. Arefiev, R. R. McNeil, G. Carlino, W. Kittel, F. DeNotaristefani, P. Marchesini, G. Marian, P. Ladron de Guevara, Werner Lustermann, Charles Timmermans, M. Dierckxsens, R. van Gulik, P. Extermann, Salvatore Mele, A. Malinin, Roberto Battiston, Tariq Aziz, Willis Lin, D. Prokofiev, M. Acciarri, Sabine Riemann, G. Raven, V. Brigljevic, Christoph Schäfer, B. Z. Yang, L. Xia, H. Hofer, Guo-Ming Chen, S. Reucroft, G. Ambrosi, K. L. Tung, Luisa Cifarelli, Gerjan Bobbink, B. Borgia, Giovanni Passaleva, P. Duinker, G. Ruggiero, A. Mihul, G. Alemanni, G. Holzner, B. N. Jin, J. Ulbricht, A. Chen, D. van Dierendonck, M. Aguilar-Benitez, O. Grimm, K. Riles, P. Wienemann, Georgi Sultanov, J. Salicio, T. S. Dai, A. C. Weber, Egidio Longo, R. A. Khan, A. M. Cartacci, Oleg Fedin, B. Tellili, F. Cesaroni, A. Lebedev, Ya Han Hu, J. K. Kim, Dong-Chul Son, M. Fabre, Mingming Yang, Manas Maity, Herwig Schopper, J. J. Blaising, J. Hirschfelder, Stefano Giagu, J.P. Martin, F. Marzano, G. Coignet, A. Klimentov, Max Weber, Crisostomo Sciacca, W. Krenz, P. Berges, G. Mirabelli, J.V. Allaby, S. Patricelli, I. Clare, H. Postema, Emilio Leonardi, S. V. Baldew, D. O. Prokofiev, E. Delmeire, U. K. Chaturvedi, M. Chemarin, K. Lübelsmeyer, D. Dufournaud, H. Anderhub, S. C. Yeh, D. Hatzifotiadou, D. Sciarrino, Y. S. Lu, G. M. Chen, Aaron Dominguez, Laszlo Boldizsar, K. Sudhakar, Riccardo Paramatti, Konrad Deiters, Nicola Cavallo, Z. Z. Xu, A. Shvorob, A. Oulianov, C. Palomares, C. H. Lin, Felicitas Pauss, G. B. Mohanty, A. Kunin, Alberto Aloisio, Michele Guida, B. Smith, H. K. Park, V. Pojidaev, Dong-Hyun Kim, L. Baksay, O. Adriani, F. Cotorobai, Jasper Kirkby, M. A. Falagan, M. von der Mey, J. H. Field, A. Bajo, S. Rosier-Lees, I. Vetlitsky, A. Buffini, J. B. Ye, Ph. Lebrun, R. Ramelli, G. Castellini, S. Braccini, Hafeez R Hoorani, G. Zilizi, Imad Baptiste Laktineh, Lucas Taylor, P. Le Coultre, M. Basile, B. Stoyanov, W. J. Burger, M. Zöller, U. Becker, D.W. Schmitz, Z. F. Gong, B. Musicar, T. Sztaricskai, M. G. Alviggi, M. W. Gruenewald, P. de Jong, N. Shivarov, S. Schmidt-Kaerst, G. Schwering, Michael Dittmar, Anna Katharina Kopp, S. S. Gau, X. W. Tang, I. Duran, M. Campanelli, R. de Asmundis, I. Fisk, T. Angelescu, L. J. Gutay, Y. Uchida, Robert Clare, D. Mangeol, Raffaello D'Alessandro, P. A. Piroué, W. J. Metzger, M. Chamizo, Kati Lassila-Perini, W. G. Ma, Thomas Hebbeker, V. Plyaskin, I. Josa-Mutuberria, M. Kräber, Z. A. Liu, A. Vorvolakos, C. Furetta, Paul Lecoq, R. W. Kraemer, D. Luckey, J. D. Swain, M. Napolitano, F. J. Eppling, L. W. Jones, M. Gataullin, J. Casaus, Minhong Wang, M. P. Sanders, J. A. van Dalen, L. Lugnier, D. Kiss, S. M. Ting, B. L. Betev, R. Berbeco, D. Haas, A. Stone, H. J. Lee, S. Saremi, D. Duchesneau, H. S. Chen, L. Servoli, Leonardo Merola, Alexei Raspereza, M. T. Dova, F. L. Linde, J. G. Branson, S. Villa, A. Böhm, An. Zalite, Marcella Diemoz, S. Pensotti, Valery Schegelsky, Antonino Zichichi, C. G. Yang, L. Tauscher, J. Pothier, Yu. Zalite, P. Molnar, J. M. Le Goff, J. Yamamoto, B. De La Cruz, H. Rykaczewski, T. Azemoon, Giovanni Organtini, N. Gheordanescu, S. N. Ganguli, A. Krüger, H. Wilkens, H. F. Chen, Maurizio Biasini, A. Degré, Marcos Cerrada, G. S. Muanza, J. A. Rubio, Axel König, P. Déglon, Marta Felcini, Jean Fay, Pàl Hidas, S. Bhattacharya, G. Chiefari, S. Shevchenko, L. Z. Sun, F. Behner, Francesco Becattini, L. Bellucci, Alessandra Doria, S. R. Hou, M. Wadhwa, D. J. Schotanus, H. J. Yang, S. Likhoded, S. Wynhoff, G. Cara Romeo, B. P. Roe, F. Brochu, D. della Volpe, H. Milcent, A. A. Vorobyov, M. Pohl, T. Moulik, Z. Szillasi, D. P. Stickland, Y. H. Chang, V. Koutsenko, Dimitri Bourilkov, L. Romero, P. Spillantini, S. Sarkar, B. Petersen, E. Fiandrini, Gyorgy Vesztergombi, Luca Malgeri, A. De Salvo, P. Bartalini, A. Seganti, Harvey B Newman, M. Musy, M. Bourquin, G. J. Grenier, Joachim Mnich, P. Achard, A. Robohm, Francesca Nessi-Tedaldi, J. D. Burger, T. Siedenburg, G. Rahal-Callot, N. Raja, H. Suter, Ia Iashvili, Francesca Cavallari, G. Y. Zhu, E. Shumilov, V. Shoutko, Claudia Cecchi, Igor Vorobiev, P. Levtchenko, Panos A Razis, Simonetta Gentile, A. Balandras, J. Berdugo, E. J. Sanchez, R. Faccini, X. L. Wang, M. Pauluzzi, D. Ren, F. C. Erné, K. Freudenreich, S. Cucciarelli, C. Maña, T. Paul, S. Vlachos, J. Rodin, T. Niessen, F. Ferroni, E. Valente, M. Lebeau, Achard, Pablo, Ambrosi, Giovanni, Bourquin, Maurice, Braccini, Saverio, Chamizo Llatas, Maria, Deglon, Patrick, Delmeire, Evelyne, Extermann, Pierre, Field, John, Kienzle, Maria-Novella, Pohl, Martin, Sciarrino, Deborah, L3 (IHEF, IoP, FNWI), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, Alberto, Alviggi, Mariagrazia, Ambrosi, G., Anderhub, H., Andreev, V. P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, L., Balandras, A., Baldew, S. V., Banerjee, S., Barczyk, A., Barillere, R., Barone, L., Bartalini, P., Basile, M., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bellucci, L., Berbeco, R., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Bhattacharya, S., Biasini, M., Biland, A., Blaising, J. J., Blyth, S. C., Bobbink, G. J., Bohm, A., Boldizsar, L., Borgia, B., Bourilkov, D., Bourquin, M., Braccini, S., Branson, J. G., Brigljevic, V., Brochu, F., Buffini, A., Buijs, A., Burger, J. D., Burger, W. J., Cai, X. D., Campanelli, M., Capell, M., Romeo, G. C., Carlino, G., Cartacci, A. M., Casaus, J., Castellini, G., Cavallari, F., Cavallo, N., Cecchi, C., Cerrada, M., Cesaroni, F., Chamizo, M., Chang, Y. H., Chaturvedi, U. K., Chemarin, M., Chen, A., Chen, G., Chen, G. M., Chen, H. F., Chen, H. S., Chiefari, Giovanni, Cifarelli, L., Cindolo, F., Civinini, G., Clare, I., Clare, R., Coignet, G., Colino, N., Costantini, S., Cotorobai, F., B. d., La, Csilling, A., Cucciarelli, S., Dai, T. S., Van, J. A., D'Alessandro, R., Asmundis, R. d., Deglon, P., Degre, A., Deiters, K., DELLA VOLPE, Domenico, Delmeire, E., Denes, P., Denotaristefani, F., Salvo, A. D., Diemoz, M., Dierckxsens, M., Dierendonck, D. v., Lodovico, F. D., Dionisi, C., Dittmar, M., Dominguez, A., Doria, A., Dova, M. T., Duchesneau, D., Dufournaud, D., Duinker, P., Duran, I., Mamouni, H. E., Engler, A., Eppling, F. J., Erne, F. C., Extermann, P., Fabre, M., Faccini, R., Falagan, M. A., Falciano, S., Favara, A., Fay, J., Fedin, O., Felcini, M., Ferguson, T., Ferroni, F., Fesefeldt, H., Fiandrini, E., Field, J. H., Filthaut, F., Fisher, P. H., Fisk, I., Forconi, G., Freudenreich, K., Furetta, C., Galaktionov, Y., Ganguli, S. N., Garcia Abia, P., Gataullin, M., Gau, S. S., Gentile, S., Gheordanescu, N., Giagu, S., Gong, Z. F., Grenier, G., Grimm, O., Gruenewald, M. W., Guida, M., Gulik, R. v., Gupta, V. K., Gurtu, A., Gutay, L. J., Haas, D., Hasan, A., Hazifotiadou, D., Hebbeker, T., Herve, A., Hidas, P., Hirschfelder, J., Hofer, H., Holzner, G., Hoorani, H., Hou, S. R., Hu, Y., Iashvili, I., Jin, B. N., Jones, L. W., Jong, P. d., Josa Mutuberria, I., Khan, R. A., Kaur, M., Kienzle Focacci, M. N., Kim, D., Kim, J. K., Kirkby, J., Kiss, D., Kittel, W., Klimentov, A., Konig, A. C., Kopp, A., Koutsenko, V., Kraber, M., Kraemer, R. W., Krenz, W., Kruger, A., Kunin, A., P. L., De, Laktineh, I., Landi, G., Lassila Perini, K., Lebeau, M., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Coultre, P. L., Lee, H. J., J. M., Le, Leiste, R., Leonardi, E., Levtchenko, P., Li, C., Likhoded, S., Lin, C. H., Lin, W. T., Linde, F. L., Lista, L., Liu, Z. A., Lohmann, W., Longo, E., Y. S., Lu, Lubelsmeyer, K., Luci, C., Luckey, D., Lugnier, L., Luminari, L., Lustermann, W., W. G., Ma, Maity, M., Malgeri, L., Malinin, A., Mana, C., Mangeol, D., Mans, J., Marchesini, P., Marian, G., Martin, J. P., Marzano, F., Mazumdar, K., Mcneil, R. R., Mele, S., Merola, Leonardo, Meschini, M., Metzger, W. J., Der, M. v., Mihul, A., Milcent, H., Mirabelli, G., Mnich, J., Mohanty, G. B., Molnar, P., Moulik, T., Muanza, G. S., A. J. M., Musicar, B., Musy, M., Napolitano, Marco, Nessi Tedaldi, F., Newman, H., Niessen, T., Nisati, A., Nowak, H., Organtini, G., Oulianov, A., Palomares, C., Pandoulas, D., Paoletti, S., Paolucci, P., Paramatti, R., Park, H. K., Park, I. H., Passaleva, G., Patricelli, Sergio, Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pedace, M., Perret Gallix, D., Petersen, B., Piccolo, D., Pierella, F., Pieri, M., Piroue, P. A., Pistolesi, E., Plyaskin, V., Pohl, M., Pojidaev, V., Postema, H., Pothier, J., Prokofiev, D. O., Prokofiev, D., Quartieri, J., Rahal Callot, G., Rahaman, M. A., Raics, P., Raja, N., Ramelli, R., Rancoita, P. G., Raspereza, A., Raven, G., Razis, P., Ren, D., Rescigno, M., Reucroft, S., Riemann, S., Riles, K., Robohm, A., Rodin, J., Roe, B. P., Romero, L., Rosca, A., Rosier Lees, S., Rubio, J. A., Ruggiero, G., Ruschmeier, D., Rykaczewski, H., Saremi, S., Sarkar, S., Salicio, J., Sanchez, E., Sanders, M. P., Sarakinos, M. E., Schafer, C., Schegelsky, V., Schmidt Kaerst, S., Schmitz, D., Schopper, H., Schotanus, D. J., Schwering, G., Sciacca, Crisostomo, Sciarrino, D., Seganti, A., Servoli, L., Shevchenko, S., Shivarov, N., Shoutko, V., Shumilov, E., Shvorob, A., Siedenburg, T., Son, D., Smith, B., Spillantini, P., Steuer, M., Stickland, D. P., Stone, A., Stoyanov, B., Straessner, A., Sudhakar, K., Sultanov, G., Sun, L. Z., Suter, H., Swain, J. D., Szillasi, Z., Sztaricskai, T., Tang, X. W., Tauscher, L., Taylor, L., Tellili, B., Timmermans, C., S. C. C., Ting, S. M., Tonwar, S. C., Toth, J., Tully, C., Tung, K. L., Uchida, Y., Ulbricht, J., Valente, E., Vesztergombi, G., Vetlitsky, I., Vicinanza, D., Viertel, G., Villa, S., Vivargent, M., Vlachos, S., Vodopianov, I., Vogel, H., Vogt, H., Vorobiev, I., Vorobyov, A. A., Vorvolakos, A., Wadhwa, M., Wallraff, W., Wang, M., Wang, X. L., Wang, Z. M., Weber, A., Weber, M., Wienemann, P., Wilkens, H., S. X., Wu, Wynhoff, S., Xia, L., Z. Z., Xu, Yamamoto, J., Yang, B. Z., Yang, C. G., Yang, H. J., Yang, M., J. B., Ye, Yeh, S. C., Zalite, A., Zalite, Y., Zhang, Z. P., Zhu, G. Y., Zhu, R. Y., Zichichi, A., Zilizi, G., Zoller, M., and Flores, Sylvie

Subjects
Nuclear and High Energy Physics, Particle physics, E+E ANNIHILATION, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Electron–positron annihilation, Hadron, FOS: Physical sciences, ddc:500.2, EVENT SHAPE DISTRIBUTIONS, 01 natural sciences, 7. Clean energy, Power law, High Energy Physics - Experiment, CROSS-SECTIONS, Nuclear physics, High Energy Physics - Experiment (hep-ex), MONTE-CARLO, POWER CORRECTIONS, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ANGLE BHABHA SCATTERING, 010306 general physics, Ciencias Exactas, Ansatz, L3 EXPERIMENT, Quantum chromodynamics, Coupling constant, Physics, Annihilation, HADRONIC EVENTS, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, LEPTON PAIR PRODUCTION, structure of hadronic events, centre-of-mass energies, L3 detector, l3 collaboration, High Energy Physics::Experiment, Energy (signal processing), Particle Physics - Experiment, TO-LEADING ORDER
Abstract

We present results obtained from a study of the structure of hadronic events recorded by the L3 detector at various centre-of-mass energies. The distributions of event shape variables and the energy dependence of their mean values are measured from 30 GeV to 189 GeV and compared with various QCD models. The energy dependence of the moments of event shape variables is used to test a power law ansatz for the non-perturbative component. We obtain a universal value of Ž 2 the non-perturbative parameter a s 0.537 ± 0.073. From a comparison with resummed O(αs2)QCD calculations, we 0 s determine the strong coupling constant at each of the selected energies. The measurements demonstrate the running of αs as expected in QCD with a value of αs(mZ) = 0.1215 ± 0.0012 (exp) ± 0.0061 (th)., Facultad de Ciencias Exactas

Published
2016

40. Search for extra dimensions in boson and fermion pair production in e(+)e(-) interactions at LEP

Author

F. C. Erné, Yu. Galaktionov, C-Q. Li, J. Alcaraz, V. K. Gupta, H. Milcent, F. DeNotaristefani, K. Freudenreich, M. Rescigno, R. Barillère, A. Mihul, T. Moulik, Egidio Longo, G. Alemanni, H. Anderhub, S. Cucciarelli, C. Maña, S. C. Yeh, Manas Maity, P. Berges, A. Barczyk, Valery Schegelsky, H. Rykaczewski, Giovanni Organtini, S. C. Blyth, H. Wilkens, Jean Fay, S. X. Wu, Nicolas Produit, Helmut Vogel, T. Angelescu, J. A. van Dalen, Michele Guida, B. Smith, S. Braccini, Pàl Hidas, S. Bhattacharya, Adrian Biland, G. Landi, A. Buijs, Marco Meschini, Dimitri Bourilkov, M. Steuer, L. Z. Sun, J. Casaus, P. Laurikainen, D. O. Prokofiev, Alessandra Doria, F. Muheim, P. Spillantini, B. Petersen, D. P. Stickland, F. Ziegler, Y. H. Chang, P. Marchesini, Roberto Battiston, V. Brigljevic, Peter Raics, C. G. Yang, J. Pothier, Raffaello D'Alessandro, Yu. Zalite, Maurizio Biasini, Jasper Kirkby, M. A. Falagan, M. Zöller, R. de Asmundis, A. Oulianov, I. Fisk, M. Lebeau, M. A. Rahaman, D. Perret-Gallix, C. Palomares, Ren-Yuan Zhu, Luciano Barone, Gyorgy Vesztergombi, Luca Malgeri, G. Schwering, I. Vodopianov, Marta Felcini, Gerjan Bobbink, B. Borgia, B. N. Jin, J. Ulbricht, Christopher George Tully, Kajari Mazumdar, X. D. Cai, Leonardo Merola, Peter H. Fisher, Francesco Becattini, Anna Katharina Kopp, L. Bellucci, A. Engler, Francesca Cavallari, J. Busenitz, A. Arefiev, C. Dionisi, F. Cindolo, A. De Salvo, M. Capell, L. Tauscher, K. Sudhakar, L. Romero, R. R. McNeil, Wolfgang Lohmann, H. Vogt, B. Bertucci, T. Azemoon, M. Pedace, T. van Rhee, C. Furetta, Pablo Garcia-Abia, Alain Hervé, G. Carlino, M. Wadhwa, W. Kittel, Y. D. Oh, D. J. Schotanus, A. Bay, R. van Gulik, P. Bartalini, Aleandro Nisati, Kati Lassila-Perini, H. S. Fesefeldt, E. Pistolesi, S. C. Kim, Lamberto Luminari, M. von der Mey, S. Sarkar, I. Clare, F. Anselmo, Nicanor Colino, A. Gurtu, T. Paul, V. Plyaskin, J. P. Martin, P. Extermann, Salvatore Mele, L. Lugnier, Carlo Civinini, P. Lecomte, Riccardo Paramatti, Christoph Schäfer, B. Z. Yang, H. Hofer, G. Raven, H. J. Yang, L. Xia, J. B. Ye, A. Kunin, Joseph Quartieri, K. L. Tung, A. Seganti, Harvey B Newman, M. Musy, Hafeez R Hoorani, Marcos Cerrada, S. Pensotti, M. Bourquin, G. Holzner, W. J. Metzger, Vladimir Andreev, D. Ruschmeier, An.A. Vorobyov, M. Aguilar-Benitez, H. El Mamouni, D. Haas, M. T. Dova, F. L. Linde, O. Grimm, F. Di Lodovico, G. Y. Zhu, J. Tóth, E. Shumilov, Herwig Schopper, A. Hasan, Axel König, R. Leiste, K. Riles, Christoph Paus, R. C. Ball, Joachim Mnich, D. H. Kim, F. Marzano, G. Coignet, V. Shoutko, O. Adriani, Imad Baptiste Laktineh, Lucas Taylor, P. Achard, H. Postema, A. Favara, S. Wynhoff, A. Lebedev, Dong-Chul Son, P. Molnar, Simone Paoletti, Marco Pieri, M. Vivargent, D. Piccolo, Dong-Hyun Kim, H. F. Chen, A. J.M. Muijs, Aaron Dominguez, M. G. Alviggi, Manjit Kaur, Felicitas Pauss, W. Krenz, G. Zilizi, B. Monteleoni, Z. A. Liu, G. Forconi, A. Vorvolakos, A. Robohm, Zheng Wang, J. J. Blaising, J. Hirschfelder, Stefano Giagu, Pierluigi Paolucci, D. Kamrad, Werner Lustermann, Charles Timmermans, S. Rosier-Lees, A. Malinin, Zhenyu Zhang, U. K. Chaturvedi, P. Le Coultre, M. Basile, Y. S. Lu, S. Saremi, Samuel C.C. Ting, A. C. Weber, R. Ostonen, T. Sztaricskai, Oleg Fedin, A. Shvorob, Claudio Luci, Max Weber, G. Marian, G. Chiefari, S. Shevchenko, A. Rosca, Igor Vorobiev, Francesca Nessi-Tedaldi, Howard A. Stone, P. Levtchenko, M. Campanelli, A. Zichichi, J. H. Field, G. Passaleva, M. W. Gruenewald, I. Josa-Mutuberria, M. Kräber, D. Mangeol, J. K. Kim, F. Behner, Peter Denes, M. E. Sarakinos, R. Ramelli, D. Luckey, I. Vetlitsky, Panos A Razis, J. D. Burger, T. Siedenburg, B. Stoyanov, G. Rahal-Callot, N. Raja, J. M. Le Goff, N. Gheordanescu, D.W. Schmitz, G. Pascale, S. Schmidt-Kaerst, D. Pandoulas, An. Zalite, H. J. Lee, Marcella Diemoz, D. Kiss, Paolo Bagnaia, L. Cifarelli, P. de Jong, N. Shivarov, Robert Clare, G. Mirabelli, W. G. Ma, M. Fabre, K. Lübelsmeyer, P. Lebrun, P. Ladron de Guevara, G. Ambrosi, B. Cozzoni, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, J. A. Rubio, S. R. Hou, F. Pierella, M. Napolitano, P. Wienemann, Georgi Sultanov, H. Suter, Ia Iashvili, M. Acciarri, Guo-Ming Chen, T. S. Dai, R. A. Khan, F. Cesaroni, D. Duchesneau, H. S. Chen, L. Servoli, A. Buffini, G. Grenier, E. Valente, W. J. Burger, D. van Dierendonck, Mingming Yang, G.S. Muanza, Simonetta Gentile, A. Button, J. Salicio, Emilio Leonardi, Michael Dittmar, S. C. Tonwar, M. Chemarin, A. Balandras, Frank Filthaut, N. Cavallo, J. Berdugo, D. Sciarrino, G. M. Chen, Thomas Ferguson, J. D. Swain, D. Peach, S. Reucroft, E. Fiandrini, S. Costantini, E. J. Sanchez, L. Baksay, F. Cotorobai, A. Böhm, R. Faccini, X. L. Wang, G. G.G. Massaro, A. Chen, D. Ren, A. P. Colijn, P. Duinker, A. Klimentov, H. K. Park, G. Castellini, B. De La Cruz, P. Déglon, S. S. Gau, M. Gataullin, A. Stone, Z. F. Gong, M. N. Kienzle-Focacci, A. Csilling, D. Prokofiev, L. J. Gutay, U. Becker, I. Duran, F. J. Eppling, L. W. Jones, S. M. Ting, M. Pauluzzi, Despina Hatzifotiadou, J.V. Allaby, S. Patricelli, Laszlo Boldizsar, L. Fredj, J. G. Branson, S. Villa, S. N. Ganguli, Konrad Deiters, G. B. Mohanty, Alberto Aloisio, A. Degré, X. W. Tang, P. A. Piroué, G. Viertel, M. Chamizo, P. G. Rancoita, H. Nowak, D. Vicinanza, W. Wallraff, S. Banerjee, Tariq Aziz, Crisostomo Sciacca, Z. Szillasi, V. Koutsenko, G. Cara Romeo, B. P. Roe, C. Cecchi, F. Brochu, D. della Volpe, M. Pohl, A. M. Cartacci, D. Dufournaud, S. W. Banerjee, I. H. Park, Z. Z. Xu, C. H. Lin, S. Vlachos, V. Pojidaev, J. Rodin, T. Niessen, F. Ferroni, Y. Uchida, Minhong Wang, M. P. Sanders, B. L. Betev, Speranza Falciano, A. Straessner, Luca Lista, Willis Lin, Sabine Riemann, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, Alberto, Alviggi, Mariagrazia, Ambrosi, B., Anderhub, H., Andreev, V. P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., Balandras, A., Ball, R. C., Banerjee, S., Barczyk, A., Barillere, R., Barone, L., Bartalini, P., Basile, M., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bellucci, L., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Bhattacharya, S., Biasini, M., Biland, A., Blaising, J. J., Blyth, S. C., Bobbink, G. J., Bohm, A., Boldizsar, L., Borgia, B., Bourilkov, D., Bourquin, M., Braccini, S., Branson, J. G., Brigljevic, V., Brochu, F., Buffini, A., Buijs, A., Burger, J. D., Burger, W. J., Busenitz, J., Button, A., Cai, X. D., Campanelli, M., Capell, M., Romeo, G. C., Carlino, G., Cartacci, A. M., Casaus, J., Castellini, G., Cavallari, F., Cavallo, N., Cecchi, G., Cerrada, M., Cesaroni, F., Chamizo, M., Chang, Y. H., Chaturvedi, U. K., Chemarin, M., Chen, A., Chen, G., Chen, G. M., Chen, H. F., Chen, H. S., Chiefari, Giovanni, Cifarelli, L., Cindolo, F., Civinini, C., Clare, I., Clare, R., Coignet, G., Colijn, A. P., Colino, N., Costantini, S., Cotorobai, F., Cozzoni, B., B. d., La, Csilling, A., Cucciarelli, S., Dai, T. S., Van, J. A., D'Alessandro, R., Asmundis, R. d., Deglon, P., Degre, A., Deiters, K., DELLA VOLPE, Domenico, Denes, P., Denotaristefani, F., Salvo, A. D., Diemoz, M., Dierendonck, D. v., Lodovico, F. D., Dionisi, C., Dittmar, M., Dominguez, A., Doria, A., Dova, M. T., Duchesneau, D., Dufournaud, D., Duinker, P., Duran, I., Mamouni, H. E., Engler, A., Eppling, F. J., Erne, F. C., Extermann, P., Fabre, M., Faccini, R., Falagan, M. A., Falciano, S., Favara, A., Fay, J., Fedin, O., Felcini, M., Ferguson, T., Ferroni, F., Fesefeldt, H., Fiandrini, E., Field, J. H., Filthaut, F., Fisher, P. H., Fisk, I., Forconi, G., Fredj, L., Freudenreich, K., Furetta, C., Galaktionov, Y., Ganguli, S. N., Garcia Abia, P., Gataullin, M., Gau, S. S., Gentile, S., Gheordanescu, N., Giagu, S., Gong, Z. F., Grenier, G., Grimm, O., Gruenewald, M. W., Guida, M., Gulik, R. v., Gupta, V. K., Gurtu, A., Gutay, L. J., Haas, D., Hasan, A., Hatzifotiadou, D., Hebbeker, T., Herve, A., Hidas, P., Hirschfelder, J., Hofer, H., Holzner, G., Hoorani, H., Hou, S. R., Iashvili, I., Jin, B. N., Jones, L. W., Jong, P. d., Josa Mutuberria, I., Khan, R. A., Kamrad, D., Kaur, M., Kienzle Focacci, M. N., Kim, D., Kim, D. H., Kim, J. K., Kim, S. C., Kirkby, J., Kiss, D., Kittel, W., Klimentov, A., Konig, A. C., Kopp, A., Koutsenko, V., Kraber, M., Kraemer, R. W., Krenz, W., Kunin, A., P. L., De, Laktineh, I., Landi, G., Lassila Perini, K., Laurikainen, P., Lebeau, M., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Coultre, P. L., Lee, H. J., J. M., Le, Leiste, R., Leonardi, E., Levtchenko, P., Li, C., Lin, C. H., Lin, W. T., Linde, F. L., Lista, L., Liu, Z. A., Lohmann, W., Longo, E., Y. S., Lu, Lubelsmeyer, K., Luci, C., Luckey, D., Lugnier, L., Luminari, L., Lustermann, W., W. G., Ma, Maity, M., Malgeri, L., Malinin, A., Mana, C., Mangeol, D., Marchesini, P., Marian, G., Martin, J. P., Marzano, F., G. G. G., Mazumdar, K., Mcneil, R. R., Mele, S., Merola, Leonardo, Meschini, M., Metzger, W. J., Der, M. v., Mihul, A., Milcent, H., Mirabelli, G., Mnich, J., Mohanty, G. B., Molnar, P., Monteleoni, B., Moulik, T., Muanza, G. S., Muheim, F., A. J. M., Musy, M., Napolitano, Marco, Nessi Tedaldi, F., Newman, H., Niessen, T., Nisati, A., Nowak, H., Y. D., Oh, Organtini, G., Ostonen, R., Oulianov, A., Palomares, C., Pandoulas, D., Paoletti, S., Paolucci, P., Paramatti, R., Park, H. K., Park, I. H., Pascale, G., Passaleva, G., Patricelli, Sergio, Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Peach, D., Pedace, M., Pensotti, S., Perret Gallix, D., Petersen, B., Piccolo, D., Pierella, F., Pieri, M., Piroue, P. A., Pistolesi, E., Plyaskin, V., Pohl, M., Pojidaev, V., Postema, H., Pothier, J., Produit, N., Prokofiev, D. O., Prokofiev, D., Quartieri, J., Rahal Callot, G., Rahaman, M. A., Raics, P., Raja, N., Ramelli, R., Rancoita, P. G., Raven, G., Razis, P., Ren, D., Rescigno, M., Reucroft, S., Rhee, T. v., Riemann, S., Riles, K., Robohm, A., Rodin, J., Roe, B. P., Romero, L., Rosca, A., Rosier Lees, S., Rubio, J. A., Ruschmeier, D., Rykaczewski, H., Saremi, S., Sarkar, S., Salicio, J., Sanchez, E., Sanders, M. P., Sarakinos, M. E., Schafer, C., Schegelsky, V., Schmidt Kaerst, S., Schmitz, D., Schopper, H., Schotanus, D. J., Schwering, G., Sciacca, Crisostomo, Sciarrino, D., Seganti, A., Servoli, L., Shevchenko, S., Shivarov, N., Shoutko, V., Shumilov, E., Shvorob, A., Siedenburg, T., Son, D., Smith, B., Spillantini, P., Steuer, M., Stickland, D. P., Stone, A., Stone, H., Stoyanov, B., Straessner, A., Sudhakar, K., Sultanov, G., Sun, L. Z., Suter, H., Swain, J. D., Szillasi, Z., Sztaricskai, T., Tang, X. W., Tauscher, L., Taylor, L., Timmermans, C., S. C. C., Ting, S. M., Tonwar, S. C., Toth, J., Tully, C., Tung, K. L., Uchida, Y., Ulbricht, J., Valente, E., Vesztergombi, G., Vetlitsky, I., Vicinanza, D., Viertel, G., Villa, S., Vivargent, M., Vlachos, S., Vodopianov, I., Vogel, H., Vogt, H., Vorobiev, I., Vorobyov, A. A., Vorvolakos, A., Wadhwa, M., Wallraff, W., Wang, M., Wang, X. L., Wang, Z. M., Weber, A., Weber, M., Wienemann, P., Wilkens, H., S. X., Wu, Wynhoff, S., Xia, L., Z. Z., Xu, Yang, B. Z., Yang, C. G., Yang, Z. P., Zhu, G. Y., Zhu, R. Y., Zichichi, A., Ziegler, F., Zilizi, G., and Zoller, M.

Subjects
Nuclear and High Energy Physics, Particle physics, E+E ANNIHILATION, ENERGIES, QED CORRECTIONS, FOS: Physical sciences, 01 natural sciences, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), MONTE-CARLO, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, REALISTIC APPROACH, Ciencias Exactas, Boson, L3 EXPERIMENT, Physics, electroweak interaction, 010308 nuclear & particles physics, Electroweak interaction, High Energy Physics::Phenomenology, Graviton, Física, z boson, large electron positron collider, Extra dimensions, Pair production, Large Electron–Positron Collider, High Energy Physics::Experiment, Electroweak scale, Particle Physics - Experiment
Abstract

Extra spatial dimensions are proposed by recent theories that postulate the scale of gravity to be of the same order as the electroweak scale. A sizeable interaction between gravitons and Standard Model particles is then predicted. Effects of these new interactions in boson and fermion pair production are searched for in the data sample collected at centre-of-mass energies above the Z pole by the L3 detector at LEP. In addition, the direct production of a graviton associated with a Z boson is investigated. No statistically significant hints for the existence of these effects are found and lower limits in excess of 1 TeV are derived on the scale of this new theory of gravity, Facultad de Ciencias Exactas

Published
2016

41. SEARCH FOR NEUTRAL CHARMLESS B-DECAYS AT LEP

Author

S. Easo, Kati Lassila-Perini, D.W. Schmitz, G. Pascale, V. Plyaskin, Samuel C.C. Ting, J. Y. Zeng, N. Shivarov, Claudio Luci, M. Rescigno, M. T. Dova, G. Passaleva, M. W. Gruenewald, I. Josa-Mutuberria, J. Rodin, Robert Clare, W. G. Ma, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, M. Napolitano, M. T. Choi, Francesca Nessi-Tedaldi, F. C. Erné, P. Schmitz, Alexei Klimentov, S. Petrak, H. S. Chen, B. Lindemann, J. D. Burger, G. Rahal-Callot, H. El Mamouni, S. Pensotti, Valery Schegelsky, Antonino Zichichi, Alessandra Doria, Tariq Aziz, N. Scholz, S. R. Hou, M. Wadhwa, D. J. Schotanus, H. O. Cohn, Marcella Diemoz, M. Vivargent, L. Servoli, Igor Vorobiev, K. Freudenreich, C. Maña, I. C. Brock, T. Angelescu, E. Lieb, J. Casaus, Yu. Kamyshkov, Helmut Vogel, S. Mele, Kajari Mazumdar, Dai-Sik Kim, F. Di Lodovico, H. Rykaczewski, Giovanni Organtini, G. M. Bilei, A. Arefiev, Yu. Efremenko, Aa Vorobyov, A. Tsaregorodtsey, P. Bartalini, P. Levtchenko, Panos A Razis, F. Ferroni, P. Laurikainen, S. Müller, B. L. Betev, A. Lebedev, Dong-Chul Son, T. Kramer, R. Barillère, E. Brambilla, E. Valente, D. McNally, O. Toker, Y. Zeng, C. G. Yang, Xd Cai, J. J. Blaising, Stefano Giagu, K. Riles, G. Viertel, R. Fabbretti, C. Lapoint, S. Morganti, Y. Karyotakis, J. Berdugo, F. Marzano, Z. A. Liu, X. Y. Yao, Luca Lista, Mariagrazia Alviggi, G. Coignet, W. Krenz, M. Möller, J. G. Xu, H. F. Chen, M. Lenti, A. Buytenhuijs, Stefan Roth, G. Schwering, K. Schultze, H. Suter, G. F. Susinno, D. Goujon, Vincenzo Innocente, D. Fernandez, Juven Wang, I. Vetlitsky, J. Schwenke, S. Costantini, E. J. Sanchez, S. X. Wu, Marco Meschini, D. Kirkby, J. M. Le Goff, Crisostomo Sciacca, N. Gheordanescu, J. C. Pinto, Jasper Kirkby, J.V. Allaby, S. Patricelli, Sabine Riemann, R. Weill, F. Muheim, Roberto Battiston, Gerjan Bobbink, Dimitri Bourilkov, B. Borgia, S. S. Gau, M. Sassowsky, A. J.W. van Mil, H. De Boeck, Y. J. Pei, H. Kuijten, A. C. Weber, J. Busenitz, W. van Rossum, C. Burgos, Adrian Biland, G. Chiefari, S. Shevchenko, F. Behner, A. M. Cartacci, Andrea Baschirotto, Mingshui Chen, J. Gerald, R. Faccini, G. G.G. Massaro, P. G. Seiler, J. A. Rubio, M. Pauluzzi, M. N. Kienzle-Focacci, J. Ulbricht, R. Raghavan, D. DiBitonto, Ph. Rosselet, E. Fiandrini, Luca Malgeri, M. Steuer, F. J. Rodriguez, Laurent Vuilleumier, H. R. Gustafson, Joel Goldstein, P. Marchesini, Y. G. Kim, Attilio Santocchia, Jean Fay, D. Boutigny, Y. H. Chang, George Alverson, Roger Moore, Christopher George Tully, Marco Pieri, Yu. Galaktionov, G. Sauvage, J. Alcaraz, K. Banicz, An.A. Vorobyov, L. Fredj, A. Favara, Z. Z. Xu, G. Tsipolitis, D. Perret-Gallix, M. Schneegans, D. Ren, Y. Zhou, F. Cesaroni, M. Chamizo, Wolfgang Lohmann, J. Shukla, J. S. Kapustinsky, J. F. Zhou, V. Soulimov, B. De La Cruz, G. Hu, H. Vogt, G. Landi, B. Bertucci, V. Pojidaev, Simone Paoletti, O. Adriani, G. Mirabelli, Bryan R. Smith, S. C. Kim, Lucas Taylor, K. Sudhakar, B. Alpat, Emilio Leonardi, A. P. Colijn, Harvey B Newman, K. Hilgers, Nicanor Colino, L. J. Gutay, Francesca Cavallari, C. Leggett, Nicolas Produit, R. Bock, I. Clare, Suchandra Dutta, W. Lu, U. Becker, P. G. Rancoita, Manjit Kaur, A. Engler, M. Capell, J. B. Ye, Federico Cindolo, S. Mangla, K. Y. Lee, L. Baksay, F. Cotorobai, J. P. Martin, Georgi Sultanov, K. Lübelsmeyer, Piero Spillantini, Carlos Willmott, Speranza Falciano, G. Cara Romeo, B. P. Roe, I. Duran, G. Forconi, Gerard Fernandez, H. S. Fesefeldt, E. Pistolesi, G. Y. Zhu, E. Shumilov, Zheng Wang, S. C. Tonwar, W. C. van Hoek, V. Shoutko, T. S. Dai, J. C. Sens, Frank Filthaut, R. A. Khan, D. Antreasyan, B. C. Riemers, R. Leiste, Christoph Paus, H. Anderhub, Zhenyu Zhang, A. Adam, Maurizio Biasini, Jozsef Toth, Marta Felcini, A. Kunin, Thomas Ferguson, J. P. Ernenwein, P. Extermann, F. J. Eppling, G. J. Zhou, L. W. Jones, R. Völkert, C. Cecchi, B. N. Jin, H. Nowak, B. Schoeneich, P. Kapinos, Hafeez R Hoorani, Christoph Schäfer, B. Z. Yang, M. Tonutti, M. E. Sarakinos, H. Hofer, D. P. Stickland, P. Duinker, Simonetta Gentile, D. Pandoulas, B. Monteleoni, F. Sticozzi, S. Reucroft, J. M. Salicio, P. Ladron de Guevara, Andre Sopczak, W. J. Metzger, S. Goldfarb, Pierluigi Paolucci, H. Janssen, M. Gailloud, Kenneth Francis Read, Francesco Becattini, T. Spickermann, Michael Dittmar, S. M. Ting, Cheng Chen, A. Mihul, W. J. Burger, C. Zaccardelli, J. S. Lee, A. Gougas, J. T. He, Egidio Longo, Subir Sarkar, H. Tuchscherer, R. Morand, W. Wallraff, Peter Denes, F. L. Linde, R. Mount, Giovanni Ambrosi, L. Romero, Nicola Cavallo, J. D. Swain, P. de Jong, M. M. Ilyas, A. Buijs, Howard A. Stone, W. W. Kinnison, S. C. Yeh, F. Tonisch, A. Chan, E. Gonzalez, Paolo Bagnaia, A. Pevsner, V. P. Andreev, S. P. Ahlen, P. Zemp, Y. F. Wang, R. de Asmundis, Wt Lin, S. Banerjee, Zp Zhang, M. Bourquin, A. Böhm, G. Castellini, K. Strauch, Joachim Mnich, Lamberto Luminari, Raffaello D'Alessandro, A. Robohm, A. Bujak, Oliver Kornadt, M. Pohl, Z. F. Gong, S. Wynhoff, Leonardo Merola, L. Tauscher, C-Q. Li, V. K. Gupta, R. C. Ball, Pierre Lecomte, M. Chemarin, A. Kasser, Konrad Deiters, W. Kittel, T. Azemoon, T. Paul, Werner Lustermann, G. Gratta, S. Ro, R. Bizzarri, Gianpaolo Carlino, F. DeNotaristefani, E. Nagy, Marcos Cerrada, Y. Mi, Axel König, Luisa Cifarelli, G. M. Chen, A. Macchiolo, M. Fabre, T. E. Coan, J. G. Branson, Manas Maity, P. Berges, Davide Piccolo, S. N. Ganguli, Peter H. Fisher, Roberto Castello, Steve Nahn, A. Nippe, Alexander Malinin, A. Degré, X. L. Wang, M. Rattaggi, J. M. You, M. Caria, A. Koulbardis, An. Zalite, V. Koutsenko, O. Rind, Aaron Dominguez, Felicitas Pauss, S. Rosier-Lees, P. Le Coultre, M. Basile, J. K. Kim, D. Luckey, Gy L. Bencze, Reinhard W. Schulte, E. Dénes, D. Duchesneau, L. Z. Sun, A. Boucham, C. Dionisi, Pablo Garcia-Abia, Alain Hervé, A. Bay, Carlo Civinini, M. Maolinbay, G. Raven, M. Aguilar-Benitez, Herwig Schopper, H. Postema, S. Röhner, F. Wittgenstein, L. Ludovici, E. Drago, R. Ostonen, A. Marin, L. Urbán, M. Lebeau, Ren-Yuan Zhu, Luciano Barone, A. Gurtu, Els Koffeman, V. Commichau, B. Hartmann, A. Hasan, I. Dorne, M. Redaelli, U. K. Chaturvedi, Y. S. Lu, J. H. Field, C. Y. Chien, A. Kirkby, B. Stoyanov, P. Lebrun, V. Brigljevic, M. Röhner, R. T. Van de Walle, M. Acciarri, Guo-Ming Chen, U. Uwer, A. Chen, D. van Dierendonck, J. Salicio, Alberto Aloisio, A. Ricker, X. W. Tang, P. A. Piroué, B. Zhou, B. C.C. van der Zwaan, L3 (IHEF, IoP, FNWI), Acciarri, M., Adam, A., Adriani, O., Aguilarbenitez, M., Ahlen, S., Alpat, B., Alcaraz, J., Allaby, J., Aloisio, Alberto, Alverson, G., Alviggi, Mariagrazia, Ambrosi, G., Anderhub, H., Andreev, V. P., Angelescu, T., Antreasyan, D., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., Ball, R. C., Banerjee, S., Banicz, K., Barillere, R., Barone, L., Bartalini, P., Baschirotto, A., Basile, M., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bencze, G. L., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Biasini, M., Biland, A., Bilei, G. M., Bizzarri, R., Blaising, J. J., Bobbink, G. J., Bock, R., Bohm, A., Borgia, B., Boucham, A., Bourilkov, D., Bourquin, M., Boutigny, D., Brambilla, E., Branson, J. G., Brigljevic, V., Brock, I. C., Buijs, A., Bujak, A., Burger, J. D., Burger, W. J., Burgos, C., Busenitz, J., Buytenhuijs, A., Cai, X. D., Capell, M., Romeo, G. C., Caria, M., Carlino, G., Cartacci, A. M., Casaus, J., Castellini, G., Castello, R., Cavallari, F., Cavallo, N., Cecchi, C., Cerrada, M., Cesaroni, F., Chamizo, M., Chan, A., Chang, Y. H., Chaturvedi, U. K., Chemarin, M., Chen, A., Chen, C., Chen, G., Chen, G. M., Chen, H. F., Chen, H. S., Chen, M., Chiefari, Giovanni, Chien, C. Y., Choi, M. T., Cifarelli, L., Cindolo, F., Civinini, C., Clare, I., Clare, R., Coan, T. E., Cohn, H. O., Coignet, G., Colijn, A. P., Colino, N., Commichau, V., Constantini, S., Cotorobai, F., Delacruz, B., Dai, T. S., Dalessandro, R., Deasmundis, R., Deboeck, H., Degre, A., Deiters, K., Denes, E., Denes, P., Denotaristefani, F., Dibitonto, D., Diemoz, M., Vandierendonck, D., Dilodovico, F., Dionisi, C., Dittmar, M., Dominguez, A., Doria, A., Dorne, I., Dova, M. T., Drago, E., Duchesneau, D., Duinker, P., Duran, I., Dutta, S., Easo, S., Efremenko, Y., Elmamouni, H., Engler, A., Eppling, F. J., Erne, F. C., Ernenwein, J. P., Extermann, P., Fabbretti, R., Fabre, M., Faccini, R., Falciano, S., Favara, A., Fay, J., Felcini, M., Ferguson, T., Fernandez, D., Fernandez, G., Ferroni, F., Fesefeldt, H., Fiandrini, E., Field, J. H., Filthaut, F., Fisher, P. H., Forconi, G., Fredj, L., Freudenreich, K., Gailloud, M., Galaktionov, Y., Ganguli, S. N., Garciaabia, P., Gau, S. S., Gentile, S., Gerald, J., Gheordanescu, N., Giagu, S., Goldfarb, S., Goldstein, J., Gong, Z. F., Gonzalez, E., Gougas, A., Goujon, D., Gratta, G., Gruenewald, M. W., Gupta, V. K., Gurtu, A., Gustafson, H. R., Gutay, L. J., Hartmann, B., Hasan, A., J. T., He, Hebbeker, T., Herve, A., Hilgers, K., Vanhoek, W. C., Hofer, H., Hoorani, H., Hou, S. R., Hu, G., Ilyas, M. M., Innocente, V., Janssen, H., Jin, B. N., Jones, L. W., Dejong, P., Josamutuberria, I., Kasser, A., Khan, R. A., Kamyshkov, Y., Kapinos, P., Kapustinsky, J. S., Karyotakis, Y., Kaur, M., Kienzlefocacci, M. N., Kim, D., Kim, J. K., Kim, S. C., Kim, Y. G., Kinnison, W. W., Kirkby, A., Kirkby, D., Kirkby, J., Kittel, W., Klimentov, A., Konig, A. C., Koffeman, E., Kornadt, O., Koutsenko, V., Koulbardis, A., Kraemer, R. W., Kramer, T., Krenz, W., Kuijten, H., Kunin, A., Deguevara, P. L., Landi, G., Lapoint, C., Lassilaperini, K., Laurikainen, P., Lebeau, M., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Lecoultre, P., Lee, J. S., Lee, K. Y., Leggett, C., Legoff, J. M., Leiste, R., Levtchenko, P., Li, C., Lieb, E., Lin, W. T., Linde, F. L., Lenti, M., Leonardi, E., Lindemann, B., Lista, L., Liu, Z. A., Lohmann, W., Longo, E., Lu, W., Y. S., Lu, Lubelsmeyer, K., Luci, C., Luckey, D., Ludovici, L., Luminari, L., Lustermann, W., W. G., Ma, Macchiolo, A., Maity, M., Malgeri, L., Malinin, A., Mana, C., Mangla, S., Maolinbay, M., Marchesini, P., Marin, A., Martin, J. P., Marzano, F., G. G. G., Mazumdar, K., Mcnally, D., Mele, S., Merola, Leonardo, Meschini, M., Metzger, W. J., Mi, Y., Mihul, A., A. J. W., Mirabelli, G., Mnich, J., Moller, M., Monteleoni, B., Moore, R., Morand, R., Morganti, S., Mount, R., Muller, S., Muheim, F., Nagy, E., Nahn, S., Napolitano, Marco, Nessitedaldi, F., Newman, H., Nippe, A., Nowak, H., Organtini, G., Ostonen, R., Pandoulas, D., Paoletti, S., Paolucci, P., Pascale, G., Passaleva, G., Patricelli, Sergio, Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pei, Y. J., Pensotti, S., Perretgallix, D., Petrak, S., Pevsner, A., Piccolo, D., Pieri, M., Pinto, J. C., Piroue, P. A., Pistolesi, E., Plyaskin, V., Pohl, M., Pojidaev, V., Postema, H., Produit, N., Raghavan, R., Rahalcallot, G., Rancoita, P. G., Rattaggi, M., Raven, G., Razis, P., Read, K., Redaelli, M., Ren, D., Rescigno, M., Reucroft, S., Ricker, A., Riemann, S., Riemers, B. C., Riles, K., Rind, O., Ro, S., Robohm, A., Rodin, J., Rodriguez, F. J., Roe, B. P., Rohner, M., Rohner, S., Romero, L., Rosierlees, S., Rosselet, P., Vanrossum, W., Roth, S., Rubio, J. A., Rykaczewski, H., Salicio, J., Salicio, J. M., Sanchez, E., Santocchia, A., Sarakinos, M. E., Sarkar, S., Sassowsky, M., Sauvage, G., Schafer, C., Schegelsky, V., Schmitz, D., Schmitz, P., Schneegans, M., Schoeneich, B., Scholz, N., Schopper, H., Schotanus, D. J., Schulte, R., Schultze, K., Schwenke, J., Schwering, G., Sciacca, Crisostomo, Seiler, P. G., Sens, J. C., Servoli, L., Shevchenko, S., Shivarov, N., Shoutko, V., Shukla, J., Shumilov, E., Son, D., Sopczak, A., Soulimov, V., Smith, B., Spickermann, T., Spillantini, P., Steuer, M., Stickland, D. P., Sticozzi, F., Stone, H., Stoyanov, B., Strauch, K., Sudhakar, K., Sultanov, G., Sun, L. Z., Susinno, G. F., Suter, H., Swain, J. D., Tang, X. W., Tauscher, L., Taylor, L., S. C. C., Ting, S. M., Toker, O., Tonisch, F., Tonutti, M., Tonwar, S. C., Toth, J., Tsaregorodtsev, A., Tsipolitis, G., Tully, C., Tuchscherer, H., Ulbricht, J., Urban, L., Uwer, U., Valente, E., Vandewalle, R. T., Vetlitsky, I., Viertel, G., Vivargent, M., Volkert, R., Vogel, H., Vogt, H., Vorobiev, I., Vorobyov, A. A., Vuilleumier, L., Wadhwa, M., Wallraff, W., Wang, J. C., Wang, X. L., Wang, Y. F., Wang, Z. M., Weber, A., Weill, R., Willmott, C., Wittgenstein, F., S. X., Wu, Wynhoff, S., Xu, J., Z. Z., Xu, Yang, B. Z., Yang, C. G., Yao, X. Y., J. B., Ye, Yeh, S. C., You, J. M., Zaccardelli, C., Zalite, A., Zemp, P., Zeng, J. Y., Zeng, Y., Zhang, Z., Zhang, Z. P., Zhou, B., Zhou, G. J., Zhou, J. F., Zhou, Y., Zhu, G. Y., Zhu, R. Y., Zichichi, A., and B. C. C.

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Higgs boson, L3 experiment, Hadron, Física, large electron positron collider, MESONS, 01 natural sciences, CP-VIOLATION, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, Large Electron–Positron Collider, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Particle Physics - Experiment, Ciencias Exactas, L3 EXPERIMENT
Abstract

A search for rare charmless decays of B0d and B0s mesons has been performed in the exclusive channels B0d(s) →ηη0, B0d(s) →ηπ0 and B0d(s) →π0π0. The data sample consisted of three million hadronic Z decays collected by the L3 experiment at LEP from 1991 through 1994. No candidate event has been observed and the following upper limits at 90% confidence level on the branching ratios have been set: Br(B0d→ηη) −4, Br(B0s →ηη) < 1.5 x 10−3, Br(B0d→ηπ0) < 2.5 x 10−4, Br(B0s→ηπ0) < 1.0 x 10−3, Br(B0d→π0π0) < 6.0 x 10−5, Br(B0s→π0π0) < 2.1 x 10−4. These are the first experimental limits on Bd0→ηη and on the Bs0 neutral charmless modes., Facultad de Ciencias Exactas

Published
2016

42. Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double beta decay

Author

J. L. Vuilleumier, B. Mong, M. Wagenpfeil, J. Dalmasson, A. Piepke, J. Todd, Y. Y. Ding, M. Heffner, Yuehe Lin, John L. Orrell, E. Raguzin, X.L. Sun, J. B. Zhao, C. T. Overman, R. Krücken, D. Qiu, Z. Li, Giorgio Gratta, A. Burenkov, M. Hasan, Arun Kumar Soma, L. J. Kaufman, R. DeVoe, S. J. Daugherty, Samuele Sangiorgio, M. Hughes, K. S. Kumar, V. Veeraraghavan, Y. Lan, Wei Wei, Petr Vogel, Rejean Fontaine, J. Daughhetee, A. Craycraft, U. Wichoski, Ethan Brown, F. Bourque, M. J. Jewell, M. Coon, D. Harris, Yu-Guang Zhou, T. Ziegler, T. Tolba, G. St-Hilaire, T. Tsang, Qun-Yao Wang, T. Stiegler, M. Chiu, J. P. Brodsky, David Moore, F. Retiere, Y. Ito, J. Zettlemoyer, Douglas H Beck, M. Oriunno, Zhijun Ning, S. Johnston, O. Zeldovich, G. Visser, A. Karelin, J. Hößl, A. Pocar, R. Tsang, T. Didberidze, S. Kravitz, Guofu Cao, T. N. Johnson, J. Schneider, P. Hufschmidt, E. V. Hansen, Y-R Yen, David A. Sinclair, F. Vachon, Ryan Killick, David Leonard, K. Murray, Liang Yang, R. J. Newby, Thomas Koffas, A. Jamil, D. Fudenberg, W. M. Fairbank, Gisela Anton, M. Côté, P. C. Rowson, T. Daniels, K. Graham, G. S. Ortega, B. T. Cleveland, M. J. Dolinski, V.N. Stekhanov, K. Odgers, Angelo Dragone, A. House, S. Rescia, A. Kuchenkov, W. Cree, Jean-Francois Pratte, Veljko Radeka, T. Rossignol, S. Feyzbakhsh, R. Saldanha, S. Delaquis, T. Brunner, W. R. Cen, Serge A. Charlebois, C. Licciardi, G. S. Li, R. Gornea, K. Skarpaas, G. Wrede, I. J. Arnquist, M. Tarka, Wei Wu, X. S. Jiang, A. Der Mesrobian-Kabakian, C. Chambers, A.C. Odian, G. Giacomini, A. Schubert, S. Parent, J. Farine, V. Belov, A. Robinson, L. Cao, F. Nolet, L. J. Wen, Marc Weber, S. X. Wu, Lorenzo Fabris, J. B. Albert, R. MacLellan, Thilo Michel, P. S. Barbeau, Jens Dilling, Xuan Zhang, I. Badhrees, I. Ostrovskiy, O. Njoya, A. Iverson, Shu Li, S. Schmidt, T. Rao, N. Roy, and E. W. Hoppe

Subjects
Physics, Time projection chamber, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Active medium, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 7. Clean energy, 3. Good health, Nuclear physics, Homogeneous, 0103 physical sciences, Sensitivity (control systems), Nuclear Experiment (nucl-ex), 010306 general physics, Enriched Xenon Observatory, Nuclear Experiment, Order of magnitude
Abstract

The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double beta ($0\nu\beta\beta$) decay in $^{136}$Xe with a target half-life sensitivity of approximately $10^{28}$ years using $5\times10^3$ kg of isotopically enriched liquid-xenon in a time projection chamber. This improvement of two orders of magnitude in sensitivity over current limits is obtained by a significant increase of the $^{136}$Xe mass, the monolithic and homogeneous configuration of the active medium, and the multi-parameter measurements of the interactions enabled by the time projection chamber. The detector concept and anticipated performance are presented based upon demonstrated realizable background rates., Comment: v2 as published

Published
2017

43. A scalable architecture for fully integrated multi-TV tuners

Author

Abdulkerim L. Coban, S. X. Wu, Vitor Pereira, Ruifeng Sun, Francesco Barale, Wenhuan Yu, Krishna Pentakota, and Mustafa H. Koroglu

Subjects
Scheme (programming language), Engineering, business.industry, Local oscillator, 020208 electrical & electronic engineering, 02 engineering and technology, Scalable architecture, Die (integrated circuit), Voltage-controlled oscillator, CMOS, Splitter, Hardware_INTEGRATEDCIRCUITS, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, business, computer, computer.programming_language, Communication channel
Abstract

Silicon TV tuners have recently achieved and surpassed bulky CAN tuners in terms of circuit performance, providing TV manufacturers lower-cost, smaller foot-print, and more reliable solutions. Silicon TV tuners also made packing multiple tuners into a single die or package possible. Multiple tuners are often needed for feature-rich TVs and Set-Top-Boxes with DVR, picture-in-picture and fast channel switching capabilities. Implemented in a 40nm CMOS technology, this paper presents major building blocks for a monolithic dual-tuner with active splitter, tracking filters and output buffers, a compact low-power VCO based ADC and a local oscillator generation scheme featuring a 17GHz VCO with fractional dividers.

Published
2017

44. Liver Tissue-related Metabolic Mechanism of Different Infusion Volumes for Hemorrhagic Shock

Author

M N, Li, Z M, Hu, Y, Pang, S X, Wu, Q, Zhang, R B, Su, Q Q, Li, J Y, Wu, D, Wang, and X J, Yu

Subjects
Random Allocation, Liver, Animals, Fluid Therapy, Rabbits, Shock, Hemorrhagic
Abstract

To investigate the curative effects of various infusion volumes on liver-related metabolic mechanism in the treatment of hemorrhagic shock.A severe hemorrhagic shock rabbit model was established in 30 rabbits. The rabbits were randomly divided into three groups： non-infusion group （A）, conventional infusion group （B）, and excessive infusion group （C） （n=10 in each group）. Taking group B as the control, groups A and C were observed for the damage of non-infusion and excessive infusion, respectively. The outcomes in the three groups and their relations with liver tissue metabolism changes were analyzed with gas chromatograph-mass spectrometer （GC-MS）.The mortality in groups A, B, and C group were 80%, 0%, and 70%, respectively. The liver tissue metabolic profile in group B showed statistically significant difference compared with that in groups A and B. In group C, the levels of 21 metabolites were lower than those in group B, and the levels of 8 metabolites were lower than those in group A. The relative contents of various metabolites were correlated with infusion volumes, and the succinic acid content was associated with death events （The conventional infusion has significant curative effect on hemorrhagic shock. The metabolites of liver tissues with excessive infusion are generally decompensated and have longer survival time than those in non-infusion group, which may caused by the excessive infusion-induced blood volume increase after hemorrhagic shock. Tissue fluid dilution is an important cause of death.不同输液量救治失血性休克的肝组织相关代谢机制.探讨不同输液量救治失血性休克对肝组织相关代谢的影响。.取30只家兔建立重度失血性休克模型，随机分为未输液组（A）、常量输液组（B）和过度输液组（C），每组10只，以常量输液组为对照，观察不输液和过度输液的危害。采用气相色谱-质谱法检测肝组织代谢物谱，分析3种不同情况与肝组织代谢变化的关系。.过度输液组、未输液组的死亡率分别为70%和80%，常量输液组无死亡。过度输液组与常量输液组、未输液组的肝组织代谢轮廓差异有统计学意义。过度输液组肝组织代谢物中有21种低于常量输液组，8种低于未输液组。多种代谢物相对含量与输液量相关，琥珀酸含量与死亡相关（常量输液救治失血性休克的疗效显著。过度输液肝组织代谢物普遍失代偿性降低，比未输液组家兔的存活时间长，可能是失血性休克后过度输液增加了血容量，组织液稀释是导致死亡的重要原因。.法医病理学；失血性休克；肝；代谢；输液量；兔.

Published
2017

45. Effects of ALA-PDT on HPV16-immortalized cervical epithelial cell

Author

D D Guan, X Y Zou, C G Shi, Y Z Zhang, S X Wu, S Liu, Y Z Li, X Y Ren, and Y L Pan

Subjects
0301 basic medicine, 030103 biophysics, Cancer Research, Programmed cell death, Pathology, medicine.medical_specialty, Papillomavirus E7 Proteins, Uterine Cervical Neoplasms, Cervical intraepithelial neoplasia, Cell Line, 03 medical and health sciences, Annexin, medicine, Humans, Cytotoxicity, Cervical cancer, Human papillomavirus 16, Oncogene, business.industry, Papillomavirus Infections, Epithelial Cells, Aminolevulinic Acid, Oncogene Proteins, Viral, medicine.disease, Uterine Cervical Dysplasia, Koilocyte, Repressor Proteins, Oncology, Photochemotherapy, Apoptosis, Cancer research, Female, Retinoblastoma-Binding Protein 4, business
Abstract

Current treatments for high-grade cervical intraepithelial neoplasia (CIN) and persistent infection with high-risk human papillomavirus (HR-HPV) type are mainly surgical interventions. However, such treatments are associated with adverse side effects and pose risks for future pregnancies. In order to reduce the requirement for excisional procedures, an effective and noninvasive therapy is needed for women at reproductive age. ALA-PDT has proved to be effective in the treatment of HPV-associated disease in several clinical investigations. In this study, the anti-proliferative effect of ALA-PDT was investigated in HPV16-immortalized cervical epithelial H8 cells. CCK-8 assay was used to measure cytotoxicity in H8 cells. The IC50 of ALA-PDT on H8 cells was about 120.75 ± 1.18 µM. We have now evaluated the mechanism by which ALA-PDT induces cell death. Annexin V-FITC/PI staining showed a significant dose-dependent induction of apoptosis by ALA-PDT in H8 cells, associated with accumulation of the tumor suppressor protein p53 and the cyclin-dependent kinase inhibitor p21. Furthermore, ALA-PDT down-regulates expression of HPV E6/E7 oncogene as well as up-regulate tumor suppressor RbAp48 protein. Together, our data provides a basis for understanding and developing ALA-PDT as a cure for HPV infection-associated diseases and prevention of cervical cancer.

Published
2017

46. Characterization of an Ionization Readout Tile for nEXO

Author

T. Stiegler, Douglas H Beck, R. Tsang, K. Murray, Gisela Anton, D. Fudenberg, R. Saldanha, Angelo Dragone, J. Todd, Y. Y. Ding, R. Krücken, Jochen M. Schneider, Y-R Yen, Jean-Francois Pratte, P. C. Rowson, K. Skarpaas, S. Kravitz, E. V. Hansen, Liang Yang, S. Feyzbakhsh, A. House, V. Veeraraghavan, R. J. Newby, A. Jamil, Ethan Brown, M. Chiu, W. Cree, A. Burenkov, S. Delaquis, M. Hughes, M. Côté, T. Daniels, Gabriele Giacomini, A. Pocar, Maulik R. Patel, M. Hasan, J. Farine, A. Karelin, R. DeVoe, Jens Dilling, Arun Kumar Soma, Zhijun Ning, T. Tolba, M. J. Jewell, I. Badhrees, David Moore, A. Robinson, T. Didberidze, B. Mong, M. Wagenpfeil, J. Dalmasson, I. J. Arnquist, Xiaoshan Jiang, Yuehe Lin, Veljko Radeka, A. Piepke, Gerrit Wrede, V.N. Stekhanov, J. B. Zhao, S. Parent, U. Wichoski, M. Oriunno, W. R. Cen, C. Chambers, R. Gornea, M. Heffner, A. Odian, D. Qiu, M. Tarka, S. Johnston, T. Ziegler, I. Ostrovskiy, John L. Orrell, E. Raguzin, Z. Li, T. Brunner, S. Rescia, S. X. Wu, Eric W. Hoppe, M. Coon, S. J. Daugherty, A. Schubert, O. Zeldovich, Cory T. Overman, G. Visser, Wei Wu, O. Njoya, A. Iverson, Triveni Rao, Y. Lan, Thomas Tsang, Shu Li, S. Schmidt, J. Daughhetee, Qian Wang, David Leonard, G. S. Ortega, Thomas Koffas, W. M. Fairbank, Samuele Sangiorgio, Giorgio Gratta, J. L. Vuilleumier, B. T. Cleveland, K. Odgers, Serge A. Charlebois, R. MacLellan, Yumei Zhou, Wei Wei, K. S. Kumar, Rejean Fontaine, A. Kuchenkov, P. Hufschmidt, David A. Sinclair, F. Bourque, J. P. Brodsky, G. St-Hilaire, D. Harris, Y. Ito, L. J. Kaufman, M. J. Dolinski, A. Craycraft, Liangjian Wen, Guofu Cao, G. S. Li, Thilo Michel, T. Rossignol, Xiaoyang Sun, C. Licciardi, A. Der Mesrobian-Kabakian, N. Roy, L. Cao, F. Nolet, F. Vachon, Marc Weber, F. Retière, J. B. Albert, X. Zhang, J. Hößl, P. S. Barbeau, V. A. Belov, and Lorenzo Fabris

Subjects
Physics - Instrumentation and Detectors, Materials science, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, STRIPS, 01 natural sciences, law.invention, Optics, Xenon, law, Ionization, 0103 physical sciences, Wafer, 010306 general physics, Instrumentation, Mathematical Physics, Time projection chamber, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Anode, chemistry, visual_art, visual_art.visual_art_medium, Tile, business
Abstract

A new design for the anode of a time projection chamber, consisting of a charge-detecting "tile", is investigated for use in large scale liquid xenon detectors. The tile is produced by depositing 60 orthogonal metal charge-collecting strips, 3~mm wide, on a 10~\si{\cm} $\times$ 10~\si{\cm} fused-silica wafer. These charge tiles may be employed by large detectors, such as the proposed tonne-scale nEXO experiment to search for neutrinoless double-beta decay. Modular by design, an array of tiles can cover a sizable area. The width of each strip is small compared to the size of the tile, so a Frisch grid is not required. A grid-less, tiled anode design is beneficial for an experiment such as nEXO, where a wire tensioning support structure and Frisch grid might contribute radioactive backgrounds and would have to be designed to accommodate cycling to cryogenic temperatures. The segmented anode also reduces some degeneracies in signal reconstruction that arise in large-area crossed-wire time projection chambers. A prototype tile was tested in a cell containing liquid xenon. Very good agreement is achieved between the measured ionization spectrum of a $^{207}$Bi source and simulations that include the microphysics of recombination in xenon and a detailed modeling of the electrostatic field of the detector. An energy resolution $\sigma/E$=5.5\% is observed at 570~\si{keV}, comparable to the best intrinsic ionization-only resolution reported in literature for liquid xenon at 936~V/\si{cm}., Comment: 18 pages, 13 figures, as published

Published
2017
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47. Ceftriaxone alleviates early brain injury after subarachnoid hemorrhage by increasing excitatory amino acid transporter 2 expression via the PI3K/Akt/NF-κB signaling pathway

Author

Huaizhou Qin, Jinghui Huang, Lin Wu, Weizhong Wang, Dayun Feng, Ma Yongyuan, Guodong Gao, S.-X. Wu, Zhang-Jin Zhang, and Yu-Lin Dong

Subjects
Male, Nucleocytoplasmic Transport Proteins, animal structures, Excitotoxicity, Glutamic Acid, Morris water navigation task, Apoptosis, Caspase 3, Biology, Pharmacology, medicine.disease_cause, Hippocampus, Neuroprotection, Rats, Sprague-Dawley, Phosphatidylinositol 3-Kinases, medicine, Animals, cardiovascular diseases, Protein kinase B, Cells, Cultured, PI3K/AKT/mTOR pathway, Neurons, TUNEL assay, General Neuroscience, Ceftriaxone, NF-kappa B, Subarachnoid Hemorrhage, Neoplasm Proteins, nervous system diseases, Blot, Disease Models, Animal, Neuroprotective Agents, Excitatory Amino Acid Transporter 2, Astrocytes, Brain Injuries, embryonic structures, Immunology, Cognition Disorders, Proto-Oncogene Proteins c-akt, Signal Transduction
Abstract

Early brain injury (EBI) after subarachnoid hemorrhage (SAH) is characterized by a reduction in excitatory amino acid transporter 2 (EAAT2) expression and severe amino acid excitotoxicity. The aim of this study was to explore the neuroprotective effect of ceftriaxone (CEF), a potent compound that up-regulates EAAT2, against EBI and the potential mechanisms using in vitro experiments and a rat model of SAH. Intracisternal treatment with CEF significantly improved neurological outcomes and alleviated extracellular glutamate accumulation after SAH. Terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling assay (TUNEL) staining and Western blot analysis of cleaved caspase 3 showed that CEF decreased hippocampal neuronal apoptosis following SAH. Immunofluorescent staining and Western blotting revealed that CEF significantly reversed the down-regulation of EAAT2 expression following SAH. In Morris water maze (MWM) tests, CEF remarkably ameliorated the SAH-induced cognitive dysfunction in spatial learning memory and reference memory. CEF promoted the nuclear translocation of p65 as well as the activation of Akt in hippocampal astrocytes in vitro and in vivo. These findings suggest that CEF may exert significant protective effects against EBI following SAH by modulating the PI3K/Akt/NF-κB signaling pathway.

Published
2014

48. [The correlation between cerebral MRI characteristics of posterior reversible encephalopathy syndrome and serum levels of PlGF, sEng in patients with pre-eclampsia]

Author

K M, Jiang, X, Zhong, Y, Tan, G C, Liu, H, Mai, and S X, Wu

Subjects
Adult, Placenta, Endoglin, Brain Edema, Receptors, Cell Surface, Pregnancy Proteins, Magnetic Resonance Imaging, Pre-Eclampsia, Antigens, CD, Pregnancy, Humans, Female, Posterior Leukoencephalopathy Syndrome, Biomarkers, Placenta Growth Factor, Retrospective Studies, Signal Transduction
Published
2016

50. [Current status and perspectives of radiotherapy for esophageal cancer]

Author

S X, Wu and L H, Wang

Subjects
Esophageal Neoplasms, Radiotherapy, Humans, Combined Modality Therapy
Abstract

Esophageal cancer is one of the most common cancers in China. More than 80% of esophageal cancer patients are diagnosed at a late stage and are not eligible for surgery. Radiotherapy is one of the most important modalities in esophageal cancer treatment. Here we reviewed the advances in esophageal cancer radiotherapy and radiotherapy-based combined-modality therapy, such as optimization of radiation dose and target volume, application of precise radiotherapy technique and the integration of radiotherapy with chemotherapy and targeted therapy.

Published
2016

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