Author: "Tull, CE" - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Tull, CE"' showing total 39 results

Start Over Author "Tull, CE"

39 results on '"Tull, CE"'

1. The Mini-CAPTAIN liquid argon time projection chamber

Author: Taylor, CE, Bhandari, B, Bian, J, Bilton, K, Callahan, C, Chaves, J, Chen, H, Cline, D, Cooper, RL, Danielson, DL, Danielson, J, Dokania, N, Elliot, S, Fernandes, S, Gardiner, S, Garvey, G, Gehman, V, Giuliani, F, Glavin, S, Gold, M, Grant, C, Guardincerri, E, Haines, T, Higuera, A, Ji, JY, Kadel, R, Kamp, N, Karlin, A, Ketchum, W, Koerner, LW, Lee, D, Lee, K, Liu, Q, Locke, S, Louis, WC, Madigan, P, Manalaysay, A, Maricic, J, Martin, E, Martinez, MJ, Martynenko, S, Mauger, C, McGrew, C, Medina, J, Medina, PJ, Mills, A, Mills, G, Mirabal-Martinez, J, Olivier, A, Pantic, E, Philipbar, B, Pitcher, C, Radeka, V, Ramsey, J, Rielage, K, Rosen, M, Sanchez, AR, Shin, J, Sinnis, G, Smy, M, Sondheim, W, Stancu, I, Sterbenz, C, Sun, Y, Svoboda, R, Teymourian, A, Thorn, C, Tull, CE, Tzanov, M, Van de Water, R, Walsh, N, Wang, H, Wang, Y, Yanagisawa, C, Yarritu, A, and Yoo, J
Subjects: Liquid argon detector, Time projection chamber, Neutron measurement, Photon detection system, physics.ins-det, hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences
Abstract: This manuscript describes the commissioning of the Mini-CAPTAIN liquid argon detector in a neutron beam at the Los Alamos Neutron Science Center (LANSCE), which led to a first measurement of high-energy neutron interactions in argon. The Mini-CAPTAIN detector consists of a Time Projection Chamber (TPC) with an accompanying photomultiplier tube (PMT) array sealed inside a liquid-argon-filled cryostat. The liquid argon is constantly purified and recirculated in a closed-loop cycle during operation. The specifications and assembly of the detector subsystems and an overview of their performance in a neutron beam are reported.
Published: 2021

2. First Measurement of the Total Neutron Cross Section on Argon between 100 and 800 MeV

Author: Bhandari, B, Bian, J, Bilton, K, Callahan, C, Chaves, J, Chen, H, Cline, D, Cooper, RL, Danielson, D, Danielson, J, Dokania, N, Elliott, S, Fernandes, S, Gardiner, S, Garvey, G, Gehman, V, Giuliani, F, Glavin, S, Gold, M, Grant, C, Guardincerri, E, Haines, T, Higuera, A, Ji, JY, Kadel, R, Kamp, N, Karlin, A, Ketchum, W, Koerner, LW, Lee, D, Lee, K, Liu, Q, Locke, S, Louis, WC, Manalaysay, A, Maricic, J, Martin, E, Martinez, MJ, Martynenko, S, Mauger, C, McGrew, C, Medina, J, Medina, PJ, Mills, A, Mills, G, Mirabal-Martinez, J, Olivier, A, Pantic, E, Philipbar, B, Pitcher, C, Radeka, V, Ramsey, J, Rielage, K, Rosen, M, Sanchez, AR, Shin, J, Sinnis, G, Smy, M, Sondheim, W, Stancu, I, Sterbenz, C, Sun, Y, Svoboda, R, Taylor, C, Teymourian, A, Thorn, C, Tull, CE, Tzanov, M, Van de Water, RG, Walker, D, Walsh, N, Wang, H, Wang, Y, Yanagisawa, C, Yarritu, A, and Yoo, J
Subjects: Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Bioengineering, CAPTAIN Collaboration, hep-ex, nucl-ex, physics.ins-det, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract: We report the first measurement of the neutron cross section on argon in the energy range of 100-800 MeV. The measurement was obtained with a 4.3-h exposure of the Mini-CAPTAIN detector to the WNR/LANSCE beam at LANL. The total cross section is measured from the attenuation coefficient of the neutron flux as it traverses the liquid argon volume. A set of 2631 candidate interactions is divided in bins of the neutron kinetic energy calculated from time-of-flight measurements. These interactions are reconstructed with custom-made algorithms specifically designed for the data in a time projection chamber the size of the Mini-CAPTAIN detector. The energy averaged cross section is 0.91±0.10(stat)±0.09(syst) b. A comparison of the measured cross section is made to the GEANT4 and FLUKA event generator packages, where the energy averaged cross sections in this range are 0.60 and 0.68 b, respectively.
Published: 2019

3. Modeling data transfers: Change point and anomaly detection

Author: Dao, C, Liu, X, Sim, A, Tull, CE, and Wu, K
Abstract: To help the operations and resource planning of a large experimental facility, we model the time needed for transferring the data files produced by the facility to a computer center, with the goals of predicting expected file transfer time and identifying unusually slow transfers that might require attention from human operators. The file transfer time can be thought of having two parts: a base time depending on the hardware and software involved, and a congestion part due to uncontrollable interferences from other operations on the shared resources including network links, disk storage systems, and CPU involved in the transfers. Since many parameters important to the transfer time are not available to us, we employ a change point detection algorithm to separate the data records into time periods (called segments) with relatively stable behavior. Within each segment, we apply a non-parametric model to describe the congestion time. When the observed file transfer time is significantly longer than typical expected time, we declare the particular file transfer to be unusually slow. When many of these unusually slow file transfers are observed, it is worthwhile to notify the human operators to investigate the abnormal behavior of the system.
Published: 2018

4. LUX-ZEPLIN (LZ) Technical Design Report

Author: Mount, BJ, Hans, S, Rosero, R, Yeh, M, Chan, C, Gaitskell, RJ, Huang, DQ, Makkinje, J, Malling, DC, Pangilinan, M, Rhyne, CA, Taylor, WC, Verbus, JR, Kim, YD, Lee, HS, Lee, J, Leonard, DS, Li, J, Belle, J, Cottle, A, Lippincott, WH, Markley, DJ, Martin, TJ, Sarychev, M, Tope, TE, Utes, M, Wang, R, Young, I, Araújo, HM, Bailey, AJ, Bauer, D, Colling, D, Currie, A, Fayer, S, Froborg, F, Greenwood, S, Jones, WG, Kasey, V, Khaleeq, M, Olcina, I, Paredes, B López, Richards, A, Sumner, TJ, Tomás, A, Vacheret, A, Brás, P, Lindote, A, Lopes, MI, Neves, F, Rodrigues, JP, Silva, C, Solovov, VN, Barry, MJ, Cole, A, Dobi, A, Edwards, WR, Faham, CH, Fiorucci, S, Gantos, NJ, Gehman, VM, Gilchriese, MGD, Hanzel, K, Hoff, MD, Kamdin, K, Lesko, KT, McConnell, CT, O'Sullivan, K, Oliver-Mallory, KC, Patton, SJ, Saba, JS, Sorensen, P, Thomas, KJ, Tull, CE, Waldron, WL, Witherell, MS, Bernstein, A, Kazkaz, K, Xu, J, Akimov, D Yu, Bolozdynya, AI, Khromov, AV, Konovalov, AM, Kumpan, AV, Sosnovtsev, VV, Dahl, CE, Temples, D, Carmona-Benitez, MC, Viveiros, L de, Akerib, DS, Auyeung, H, Biesiadzinski, TP, Breidenbach, M, Bramante, R, Conley, R, Craddock, WW, Fan, A, Hau, A, Ignarra, CM, Ji, W, and Krebs, HJ
Subjects: physics.ins-det, astro-ph.IM, hep-ex
Abstract: In this Technical Design Report (TDR) we describe the LZ detector to be builtat the Sanford Underground Research Facility (SURF). The LZ dark matterexperiment is designed to achieve sensitivity to a WIMP-nucleonspin-independent cross section of three times ten to the negative forty-eighthsquare centimeters.
Published: 2017

5. Making advanced scientific algorithms and big scientific data management more accessible

Author: Venkatakrishnan, SV, Mohan, KA, Beattie, K, Correa, J, Dart, E, Deslippe, JR, Hexemer, A, Krishnan, H, MacDowell, AA, Marchesini, S, Patton, SJ, Perciano, T, Sethian, JA, Stromsness, R, Tierney, BL, Tull, CE, Ushizima, D, and Parkinson, DY
Abstract: Synchrotrons such as the Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory are user facilities - they are sources of extremely bright X-ray beams, and scientists come from all over the world to perform experiments that require these beams. As the complexity of experiments has increased, and the size and rates of data sets has exploded, managing, analyzing and presenting the data collected at synchrotrons has been an increasing challenge. The ALS has partnered with high performance computing, fast networking, and applied mathematics groups to create a"super-facility", giving users simultaneous access to the experimental, computational, and algorithmic resources to overcome this challenge. This combination forms an efficient closed loop, where data despite its high rate and volume is transferred and processed, in many cases immediately and automatically, on appropriate compute resources, and results are extracted, visualized, and presented to users or to the experimental control system, both to provide immediate insight and to guide decisions about subsequent experiments during beam-time. In this paper, We will present work done on advanced tomographic reconstruction algorithms to support users of the 3D micron-scale imaging instrument (Beamline 8.3.2, hard X-ray micro-tomography).
Published: 2016

6. GANGA: a user-Grid interface for Atlas and LHCb

Author: Harrison, K, Lavrijsen, WTLP, Mato, P, Soroko, A, Tan, CL, Tull, CE, Brook, N, and Jones, RWL
Subjects: cs.SE, D.2.6
Abstract: The Gaudi/Athena and Grid Alliance (GANGA) is a front-end for theconfiguration, submission, monitoring, bookkeeping, output collection, andreporting of computing jobs run on a local batch system or on the grid. Inparticular, GANGA handles jobs that use applications written for the Gaudisoftware framework shared by the Atlas and LHCb experiments. GANGA exploits thecommonality of Gaudi-based computing jobs, while insulating against grid-,batch- and framework-specific technicalities, to maximize end-user productivityin defining, configuring, and executing jobs. Designed for a python-basedcomponent architecture, GANGA has a modular underpinning and is therefore wellplaced for contributing to, and benefiting from, work in related projects. Itsfunctionality is accessible both from a scriptable command-line interface, forexpert users and automated tasks, and through a graphical interface, whichsimplifies the interaction with GANGA for beginning and c1asual users. This paper presents the GANGA design and implementation, the development ofthe underlying software bus architecture, and the functionality of the firstpublic GANGA release.
Published: 2003

7. Study of the wave packet treatment of neutrino oscillation at Daya Bay

Author: An, FP, Balantekin, AB, Band, HR, Bishai, M, Blyth, S, Cao, D, Cao, GF, Cao, J, Cen, WR, Chan, YL, Chang, JF, Chang, LC, Chang, Y, Chen, HS, Chen, QY, Chen, SM, Chen, YX, Chen, Y, Cheng, J-H, Cheng, J, Cheng, YP, Cheng, ZK, Cherwinka, JJ, Chu, MC, Chukanov, A, Cummings, JP, Arcos, JD, Deng, ZY, Ding, XF, Ding, YY, Diwan, MV, Dolgareva, M, Dove, J, Dwyer, DA, Edwards, WR, Gill, R, Gonchar, M, Gong, GH, Gong, H, Grassi, M, Gu, WQ, Guan, MY, Guo, L, Guo, XH, Guo, Z, Hackenburg, RW, Han, R, Hans, S, He, M, Heeger, KM, Heng, YK, Higuera, A, Hor, YK, Hsiung, YB, Hu, BZ, Hu, T, Hu, W, Huang, EC, Huang, HX, Huang, XT, Huber, P, Huo, W, Hussain, G, Jaffe, DE, Jaffke, P, Jen, KL, Jetter, S, Ji, XP, Ji, XL, Jiao, JB, Johnson, RA, Joshi, J, Kang, L, Kettell, SH, Kohn, S, Kramer, M, Kwan, KK, Kwok, MW, Kwok, T, Langford, TJ, Lau, K, Lebanowski, L, Lee, J, Lee, JHC, Lei, RT, Leitner, R, Leung, JKC, Li, C, Li, DJ, Li, F, Li, GS, Li, QJ, Li, S, Li, SC, Li, WD, Li, XN, Li, YF, Li, ZB, Liang, H, Lin, CJ, Lin, GL, Lin, S, Lin, SK, Lin, Y-C, Ling, JJ, Link, JM, Littenberg, L, Littlejohn, BR, Liu, DW, Liu, JL, Liu, JC, Loh, CW, Lu, C, Lu, HQ, Lu, JS, Luk, KB, Lv, Z, Ma, QM, Ma, XY, Ma, XB, Ma, YQ, Malyshkin, Y, Caicedo, DAM, McKeown, RD, Mitchell, I, Mooney, M, Nakajima, Y, Napolitano, J, Naumov, D, Naumova, E, Ngai, HY, Ning, Z, Ochoa-Ricoux, JP, Olshevskiy, A, Pan, H-R, Park, J, Patton, S, Pec, V, Peng, JC, Pinsky, L, Pun, CSJ, Qi, FZ, Qi, M, Qian, X, Raper, N, Ren, J, Rosero, R, Roskovec, B, Ruan, XC, Steiner, H, Sun, GX, Sun, JL, Tang, W, Taychenachev, D, Treskov, K, Tsang, KV, Tull, CE, Viaux, N, Viren, B, Vorobel, V, Wang, CH, Wang, M, Wang, NY, Wang, RG, Wang, W, Wang, X, Wang, YF, Wang, Z, Wang, ZM, Wei, HY, Wen, LJ, Whisnant, K, White, CG, Whitehead, L, Wise, T, Wong, HLH, Wong, SCF, Worcester, E, Wu, C-H, Wu, Q, Wu, WJ, Xia, DM, Xia, JK, Xing, ZZ, Xu, JY, Xu, JL, Xu, Y, Xue, T, Yang, CG, Yang, H, Yang, L, Yang, MS, Yang, MT, Ye, M, Ye, Z, Yeh, M, Young, BL, Yu, ZY, Zeng, S, Zhan, L, Zhang, C, Zhang, HH, Zhang, JW, Zhang, QM, Zhang, XT, Zhang, YM, Zhang, YX, Zhang, ZJ, Zhang, ZY, Zhang, ZP, Zhao, J, Zhao, QW, Zhao, YB, Zhong, WL, Zhou, L, Zhou, N, Zhuang, HL, Zou, JH, An, FP, Balantekin, AB, Band, HR, Bishai, M, Blyth, S, Cao, D, Cao, GF, Cao, J, Cen, WR, Chan, YL, Chang, JF, Chang, LC, Chang, Y, Chen, HS, Chen, QY, Chen, SM, Chen, YX, Chen, Y, Cheng, J-H, Cheng, J, Cheng, YP, Cheng, ZK, Cherwinka, JJ, Chu, MC, Chukanov, A, Cummings, JP, Arcos, JD, Deng, ZY, Ding, XF, Ding, YY, Diwan, MV, Dolgareva, M, Dove, J, Dwyer, DA, Edwards, WR, Gill, R, Gonchar, M, Gong, GH, Gong, H, Grassi, M, Gu, WQ, Guan, MY, Guo, L, Guo, XH, Guo, Z, Hackenburg, RW, Han, R, Hans, S, He, M, Heeger, KM, Heng, YK, Higuera, A, Hor, YK, Hsiung, YB, Hu, BZ, Hu, T, Hu, W, Huang, EC, Huang, HX, Huang, XT, Huber, P, Huo, W, Hussain, G, Jaffe, DE, Jaffke, P, Jen, KL, Jetter, S, Ji, XP, Ji, XL, Jiao, JB, Johnson, RA, Joshi, J, Kang, L, Kettell, SH, Kohn, S, Kramer, M, Kwan, KK, Kwok, MW, Kwok, T, Langford, TJ, Lau, K, Lebanowski, L, Lee, J, Lee, JHC, Lei, RT, Leitner, R, Leung, JKC, Li, C, Li, DJ, Li, F, Li, GS, Li, QJ, Li, S, Li, SC, Li, WD, Li, XN, Li, YF, Li, ZB, Liang, H, Lin, CJ, Lin, GL, Lin, S, Lin, SK, Lin, Y-C, Ling, JJ, Link, JM, Littenberg, L, Littlejohn, BR, Liu, DW, Liu, JL, Liu, JC, Loh, CW, Lu, C, Lu, HQ, Lu, JS, Luk, KB, Lv, Z, Ma, QM, Ma, XY, Ma, XB, Ma, YQ, Malyshkin, Y, Caicedo, DAM, McKeown, RD, Mitchell, I, Mooney, M, Nakajima, Y, Napolitano, J, Naumov, D, Naumova, E, Ngai, HY, Ning, Z, Ochoa-Ricoux, JP, Olshevskiy, A, Pan, H-R, Park, J, Patton, S, Pec, V, Peng, JC, Pinsky, L, Pun, CSJ, Qi, FZ, Qi, M, Qian, X, Raper, N, Ren, J, Rosero, R, Roskovec, B, Ruan, XC, Steiner, H, Sun, GX, Sun, JL, Tang, W, Taychenachev, D, Treskov, K, Tsang, KV, Tull, CE, Viaux, N, Viren, B, Vorobel, V, Wang, CH, Wang, M, Wang, NY, Wang, RG, Wang, W, Wang, X, Wang, YF, Wang, Z, Wang, ZM, Wei, HY, Wen, LJ, Whisnant, K, White, CG, Whitehead, L, Wise, T, Wong, HLH, Wong, SCF, Worcester, E, Wu, C-H, Wu, Q, Wu, WJ, Xia, DM, Xia, JK, Xing, ZZ, Xu, JY, Xu, JL, Xu, Y, Xue, T, Yang, CG, Yang, H, Yang, L, Yang, MS, Yang, MT, Ye, M, Ye, Z, Yeh, M, Young, BL, Yu, ZY, Zeng, S, Zhan, L, Zhang, C, Zhang, HH, Zhang, JW, Zhang, QM, Zhang, XT, Zhang, YM, Zhang, YX, Zhang, ZJ, Zhang, ZY, Zhang, ZP, Zhao, J, Zhao, QW, Zhao, YB, Zhong, WL, Zhou, L, Zhou, N, Zhuang, HL, and Zou, JH
Abstract: The disappearance of reactor $\bar{\nu}_e$ observed by the Daya Bay experiment is examined in the framework of a model in which the neutrino is described by a wave packet with a relative intrinsic momentum dispersion $\sigma_\text{rel}$. Three pairs of nuclear reactors and eight antineutrino detectors, each with good energy resolution, distributed among three experimental halls, supply a high-statistics sample of $\bar{\nu}_e$ acquired at nine different baselines. This provides a unique platform to test the effects which arise from the wave packet treatment of neutrino oscillation. The modified survival probability formula was used to fit Daya Bay data, providing the first experimental limits: $2.38 \cdot 10^{-17} < \sigma_{\rm rel} < 0.23$. Treating the dimensions of the reactor cores and detectors as constraints, the limits are improved: $10^{-14} \lesssim \sigma_{\rm rel} < 0.23$, and an upper limit of $\sigma_{\rm rel} <0.20$ is obtained. All limits correspond to a 95\% C.L. Furthermore, the effect due to the wave packet nature of neutrino oscillation is found to be insignificant for reactor antineutrinos detected by the Daya Bay experiment thus ensuring an unbiased measurement of the oscillation parameters $\sin^22\theta_{13}$ and $\Delta m^2_{32}$ within the plane wave model.
Published: 2017

8. GANGA: a user-Grid interface for Atlas and LHCb

Author: Harrison, K, Lavrijsen, WTLP, Mato, P, Soroko, A, Tan, CL, Tull, CE, Brook, N, Jones, RWL, Harrison, K, Lavrijsen, WTLP, Mato, P, Soroko, A, Tan, CL, Tull, CE, Brook, N, and Jones, RWL
Abstract: The Gaudi/Athena and Grid Alliance (GANGA) is a front-end for the configuration, submission, monitoring, bookkeeping, output collection, and reporting of computing jobs run on a local batch system or on the grid. In particular, GANGA handles jobs that use applications written for the Gaudi software framework shared by the Atlas and LHCb experiments. GANGA exploits the commonality of Gaudi-based computing jobs, while insulating against grid-, batch- and framework-specific technicalities, to maximize end-user productivity in defining, configuring, and executing jobs. Designed for a python-based component architecture, GANGA has a modular underpinning and is therefore well placed for contributing to, and benefiting from, work in related projects. Its functionality is accessible both from a scriptable command-line interface, for expert users and automated tasks, and through a graphical interface, which simplifies the interaction with GANGA for beginning and c1asual users. This paper presents the GANGA design and implementation, the development of the underlying software bus architecture, and the functionality of the first public GANGA release.
Published: 2017

9. LUX-ZEPLIN (LZ) Conceptual Design Report

Author: Collaboration, TLZ, Akerib, DS, Akerlof, CW, Akimov, DY, Alsum, SK, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Barry, MJ, Bauer, P, Beltrame, P, Bernard, EP, Bernstein, A, Biesiadzinski, TP, Boast, KE, Bolozdynya, AI, Boulton, EM, Bramante, R, Buckley, JH, Bugaev, VV, Bunker, R, Burdin, S, Busenitz, JK, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Craddock, WW, Currie, A, Cutter, JE, Cunha, JPD, Dahl, CE, Dasu, S, Davison, TJR, Viveiros, LD, Dobi, A, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Edwards, BN, Edwards, WR, Elnimr, MM, Emmet, WT, Faham, CH, Fiorucci, S, Ford, P, Francis, VB, Fu, C, Gaitskell, RJ, Gantos, NJ, Gehman, VM, Gerhard, RM, Ghag, C, Gilchriese, MGD, Gomber, B, Hall, CR, Harris, A, Haselschwardt, SJ, Hertel, SA, Hoff, MD, Holbrook, B, Holtom, E, Huang, DQ, Hurteau, TW, Ignarra, CM, Jacobsen, RG, Ji, W, Ji, X, Johnson, M, Ju, Y, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khromov, AV, Konovalov, AM, Korolkova, EV, Kraus, H, Krebs, HJ, Kudryavtsev, VA, Kumpan, AV, Kyre, S, Larsen, NA, Lee, C, Lenardo, BG, Lesko, KT, Liao, F-T, Lin, J, Lindote, A, Lippincott, WH, Liu, J, Liu, X, Lopes, MI, Lorenzon, W, Luitz, S, Majewski, P, Malling, DC, Manalaysay, AG, Manenti, L, Mannino, RL, Markley, DJ, Martin, TJ, Marzioni, MF, McKinsey, DN, Mei, D-M, Meng, Y, Miller, EH, Mock, J, Monzani, ME, Morad, JA, Murphy, ASJ, Nelson, HN, Neves, F, Nikkel, JA, O'Neill, FG, O'Dell, J, O'Sullivan, K, Olevitch, MA, Oliver-Mallory, KC, Palladino, KJ, Pangilinan, M, Patton, SJ, Pease, EK, Piepke, A, Powell, S, Preece, RM, Pushkin, K, Ratcliff, BN, Reichenbacher, J, Reichhart, L, Rhyne, C, Rodrigues, JP, Rose, HJ, Rosero, R, Saba, JS, Sarychev, M, Schnee, RW, Schubnell, MSG, Scovell, PR, Shaw, S, Shutt, TA, Silva, C, Skarpaas, K, Skulski, W, Solovov, VN, Sorensen, P, Sosnovtsev, VV, Stancu, I, Stark, MR, Stephenson, S, Stiegler, TM, Sumner, TJ, Sundarnath, K, Szydagis, M, Taylor, DJ, Taylor, W, Tennyson, BP, Terman, PA, Thomas, KJ, Thomson, JA, Tiedt, DR, To, WH, Tomás, A, Tripathi, M, Tull, CE, Tvrznikova, L, Uvarov, S, Va'vra, J, Grinten, MGDVD, Verbus, JR, Vuosalo, CO, Waldron, WL, Wang, L, Webb, RC, Wei, W-Z, While, M, White, DT, Whitis, TJ, Wisniewski, WJ, Witherell, MS, Wolfs, FLH, Woods, E, Woodward, D, Worm, SD, Yeh, M, Yin, J, Young, SK, and Zhang, C
Abstract: The design and performance of the LUX-ZEPLIN (LZ) detector is described as of March 2015 in this Conceptual Design Report. LZ is a second-generation dark-matter detector with the potential for unprecedented sensitivity to weakly interacting massive particles (WIMPs) of masses from a few GeV/c2 to hundreds of TeV/c2. With total liquid xenon mass of about 10 tonnes, LZ will be the most sensitive experiment for WIMPs in this mass region by the end of the decade. This report describes in detail the design of the LZ technical systems. Expected backgrounds are quantified and the performance of the experiment is presented. The LZ detector will be located at the Sanford Underground Research Facility in South Dakota. The organization of the LZ Project and a summary of the expected cost and current schedule are given.
Published: 2015

10. Independent measurement of the neutrino mixing angle theta(13) via neutron capture on hydrogen at Daya Bay

Author: An, FP, Balantekin, AB, Band, HR, Beriguete, W, Bishai, M, Blyth, S, Butorov, I, Cao, GF, Cao, J, Chan, YL, Chang, JF, Chang, LC, Chang, Y, Chasman, C, Chen, H, Chen, QY, Chen, SM, Chen, X, Chen, YX, Chen, Y, Cheng, YP, Cherwinka, JJ, Chu, MC, Cummings, JP, de Arcos, J, Deng, ZY, Ding, YY, Diwan, MV, Draeger, E, Du, XF, Dwyer, DA, Edwards, WR, Ely, SR, Fu, JY, Ge, LQ, Gill, R, Gonchar, M, Gong, GH, Gong, H, Gu, WQ, Guan, MY, Guo, XH, Hackenburg, RW, Han, GH, Hans, S, He, M, Heeger, M, Heng, YK, Hinrichs, P, Hor, YK, Hsiung, YB, Hu, BZ, Hu, LM, Hu, LJ, Hu, T, Hu, W, Huang, EC, Huang, H, Huang, XT, Huber, P, Hussain, G, Isvan, Z, Jaffe, DE, Jaffke, P, Jen, KL, Jetter, S, Ji, XP, Ji, XL, Jiang, HJ, Jiao, JB, Johnson, RA, Kang, L, Kettell, SH, Kramer, M, Kwan, KK, Kwok, MW, Kwok, T, Lai, WC, Lau, K, Lebanowski, L, Lee, J, Lei, RT, Leitner, R, Leung, A, Leung, JKC, Lewis, CA, Li, DJ, Li, F, Li, GS, Li, QJ, Li, WD, Li, XN, Li, XQ, Li, YF, Li, ZB, Liang, H, Lin, CJ, Lin, GL, Lin, PY, Lin, SK, Lin, YC, Ling, JJ, Link, JM, Littenberg, L, Littlejohn, BR, Liu, DW, Liu, H, Liu, JL, Liu, JC, Liu, SS, Liu, YB, Lu, C, Lu, HQ, Luk, KB, Ma, QM, Ma, XY, Ma, XB, Ma, YQ, McDonald, KT, McFarlane, MC, McKeown, RD, Meng, Y, Mitchell, I, Kebwaro, JM, Nakajima, Y, Napolitano, J, Naumov, D, Naumova, E, Nemchenok, I, Ngai, HY, Ning, Z, Ochoa-Ricoux, JP, Olshevski, A, Patton, S, Pec, V, Peng, JC, Piilonen, LE, Pinsky, L, Pun, CSJ, Qi, FZ, Qi, M, Qian, X, Raper, N, Ren, B, Ren, J, Rosero, R, Roskovec, B, Ruan, XC, Shao, BB, Steiner, H, Sun, GX, Sun, JL, Tam, YH, Tang, X, Themann, H, Tsang, KV, Tsang, RHM, Tull, CE, Tung, YC, Viren, B, Vorobel, V, Wang, CH, Wang, LS, Wang, LY, Wang, M, Wang, NY, Wang, RG, Wang, W, Wang, WW, Wang, X, Wang, YF, Wang, Z, Wang, ZM, Webber, DM, Wei, HY, Wei, YD, Wen, LJ, Whisnant, K, White, CG, Whitehead, L, Wise, T, Wong, HLH, Wong, SCF, Worcester, E, Wu, Q, Xia, DM, Xia, JK, Xia, X, Xing, ZZ, Xu, JY, Xu, JL, Xu, J, Xu, Y, Xue, T, Yan, J, Yang, CC, Yang, L, Yang, MS, Yang, MT, Ye, M, Yeh, M, Yeh, YS, Young, BL, Yu, GY, Yu, JY, Yu, ZY, Zang, SL, Zeng, B, Zhan, L, Zhang, C, Zhang, FH, Zhang, JW, Zhang, QM, Zhang, Q, Zhang, SH, Zhang, YC, Zhang, YM, Zhang, YH, Zhang, YX, Zhang, ZJ, Zhang, ZY, Zhang, ZP, Zhao, J, Zhao, QW, Zhao, Y, Zhao, YB, Zheng, L, Zhong, WL, Zhou, L, Zhou, ZY, Zhuang, HL, Zou, JH, and Collaboration, DB
Published: 2014

11. GMA Instrumentation of the Athena Framework using NetLogger

Author: Tull, CE, Gunter, D, Lavrijsen, W, Quarrie, D, and Tierney, B
Subjects: FOS: Computer and information sciences, C.2.2, cs.DC, Computer Science - Distributed, Parallel, and Cluster Computing, cs.IR, Distributed, Parallel, and Cluster Computing (cs.DC), Information Retrieval (cs.IR), Computing and Computers, Computer Science - Information Retrieval
Abstract: Grid applications are, by their nature, wide-area distributed applications. This WAN aspect of Grid applications makes the use of conventional monitoring and instrumentation tools (such as top, gprof, LSF Monitor, etc) impractical for verification that the application is running correctly and efficiently. To be effective, monitoring data must be "end-to-end", meaning that all components between the Grid application endpoints must be monitored. Instrumented applications can generate a large amount of monitoring data, so typically the instrumentation is off by default. For jobs running on a Grid, there needs to be a general mechanism to remotely activate the instrumentation in running jobs. The NetLogger Toolkit Activation Service provides this mechanism. To demonstrate this, we have instrumented the ATLAS Athena Framework with NetLogger to generate monitoring events. We then use a GMA-based activation service to control NetLogger's trigger mechanism. The NetLogger trigger mechanism allows one to easily start, stop, or change the logging level of a running program by modifying a trigger file. We present here details of the design of the NetLogger implementation of the GMA-based activation service and the instrumentation service for Athena. We also describe how this activation service allows us to non-intrusively collect and visualize the ATLAS Athena Framework monitoring data. Grid applications are, by their nature, wide-area distributed applications. This WAN aspect of Grid applications makes the use of conventional monitoring and instrumentation tools (such as top, gprof, LSF Monitor, etc) impractical for verification that the application is running correctly and efficiently. To be effective, monitoring data must be end-to-end, meaning that all components between the Grid application endpoints must be monitored. Instrumented applications can generate a large amount of monitoring data, so typically the instrumentation is off by default. For jobs running on a Grid, there needs to be a general mechanism to remotely activate the instrumentation in running jobs. The NetLogger Toolkit Activation Service provides this mechanism. To demonstrate this, we have instrumented the ATLAS Athena Framework with NetLogger to generate monitoring events. We then use a GMA-based activation service to control NetLogger's trigger mechanism. The NetLogger trigger mechanism allows one to easily start, stop, or change the logging level of a running program by modifying a trigger file. We present here details of the design of the NetLogger implementation of the GMA-based activation service and the instrumentation service for Athena. We also describe how this activation service allows us to non-intrusively collect and visualize the ATLAS Athena Framework monitoring data.
Published: 2003

12. Neutron production in coincidence with fragments from the Ca-40+H reaction at E-lab=357A and 565A MeV

Author: Tuve, C., Albergo, S., Boemi, D., Caccia, Z., Chen, Cx, Costa, S., Crawford, Hj, Cronqvist, M., Engelage, J., Greiner, L., Guzik, Tg, Knott, Cn, Antonio Insolia, Lindstrom, Pj, Mitchell, Jw, Potenza, R., Russo, Gv, Soutoul, A., Testard, O., Tricomi, A., Tull, Ce, Waddington, Cj, Webber, Wr, and Wefel, Jp
Published: 1999

13. Systematics of isotopic production cross sections from interactions of relativistic Ca-40 in hydrogen

Author: Chen, Cx, Albergo, Sebastiano Francesco, Caccia, Z, Costa, Salvatore, Crawford, Hj, Cronqvist, M, Engelage, J, Greiner, L, Guzik, Tg, Insolia, Antonio, Knott, Cn, Lindstrom, Pj, Mcmahon, M, Mitchell, Jw, Potenza, R, Russo, Gv, Soutoul, A, Testard, O, Tull, Ce, Tuve', Cristina Natalina, Waddington, Cj, Webber, Wr, and Wefel, Jp
Published: 1997

14. LUX-ZEPLIN (LZ) Conceptual Design Report

Author: Collaboration, TLZ, Akerib, DS, Akerlof, CW, Akimov, DY, Alsum, SK, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Barry, MJ, Wei, W-Z, While, M, White, DT, Whitis, TJ, Wisniewski, WJ, Witherell, MS, Wolfs, FLH, Woods, E, Woodward, D, Bramante, R, Lorenzon, W, Worm, SD, Yeh, M, Yin, J, Young, SK, Zhang, C, Buckley, JH, Bugaev, Bunker, R, Burdin, S, Busenitz, JK, Luitz, S, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Craddock, WW, Majewski, P, Currie, A, Cutter, JE, Cunha, JPD, Dahl, CE, Dasu, S, Davison, TJR, Viveiros, LD, Dobi, A, Dobson, JEY, Druszkiewicz, E, Malling, DC, Edberg, TK, Edwards, BN, Edwards, WR, Elnimr, MM, Emmet, WT, Faham, CH, Fiorucci, S, Ford, P, Francis, VB, Fu, C, Manalaysay, AG, Gaitskell, RJ, Gantos, NJ, Gehman, VM, Gerhard, RM, Ghag, C, Gilchriese, MGD, Gomber, B, Hall, CR, Harris, A, Haselschwardt, SJ, Manenti, L, Hertel, SA, Hoff, MD, Holbrook, B, Holtom, E, Huang, DQ, Hurteau, TW, Ignarra, CM, Jacobsen, RG, Ji, W, Ji, X, Mannino, RL, Johnson, M, Ju, Y, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khromov, AV, Konovalov, AM, Korolkova, EV, Kraus, H, Markley, DJ, Krebs, HJ, Kudryavtsev, VA, Kumpan, AV, Kyre, S, Larsen, NA, Lee, C, Lenardo, BG, Lesko, KT, Liao, F-T, Lin, J, Martin, TJ, Lindote, A, Lippincott, WH, Liu, J, Liu, X, Lopes, MI, Marzioni, MF, Bauer, P, McKinsey, DN, Mei, D-M, Meng, Y, Miller, EH, Mock, J, Monzani, ME, Morad, JA, Murphy, ASJ, Nelson, HN, Neves, F, Beltrame, P, Nikkel, JA, O'Neill, FG, O'Dell, J, O'Sullivan, K, Olevitch, MA, Oliver-Mallory, KC, Palladino, KJ, Pangilinan, M, Patton, SJ, Pease, EK, Bernard, EP, Piepke, A, Powell, S, Preece, RM, Pushkin, K, Ratcliff, BN, Reichenbacher, J, Reichhart, L, Rhyne, C, Rodrigues, JP, Rose, HJ, Bernstein, A, Rosero, R, Saba, JS, Sarychev, M, Schnee, RW, Schubnell, MSG, Scovell, PR, Shaw, S, Shutt, TA, Silva, C, Skarpaas, K, Biesiadzinski, TP, Skulski, W, Solovov, VN, Sorensen, P, Sosnovtsev, Stancu, I, Stark, MR, Stephenson, S, Stiegler, TM, Sumner, TJ, Sundarnath, K, Boast, KE, Szydagis, M, Taylor, DJ, Taylor, W, Tennyson, BP, Terman, PA, Thomas, KJ, Thomson, JA, Tiedt, DR, To, WH, Tomás, A, Bolozdynya, AI, Tripathi, M, Tull, CE, Tvrznikova, L, Uvarov, S, Va'vra, J, Grinten, MGDVD, Verbus, Vuosalo, CO, Waldron, WL, Wang, L, Boulton, EM, and Webb, RC
Subjects: hep-ex, 7. Clean energy, physics.ins-det, astro-ph.IM
Abstract: The design and performance of the LUX-ZEPLIN (LZ) detector is described as of March 2015 in this Conceptual Design Report. LZ is a second-generation dark-matter detector with the potential for unprecedented sensitivity to weakly interacting massive particles (WIMPs) of masses from a few GeV/c2 to hundreds of TeV/c2. With total liquid xenon mass of about 10 tonnes, LZ will be the most sensitive experiment for WIMPs in this mass region by the end of the decade. This report describes in detail the design of the LZ technical systems. Expected backgrounds are quantified and the performance of the experiment is presented. The LZ detector will be located at the Sanford Underground Research Facility in South Dakota. The organization of the LZ Project and a summary of the expected cost and current schedule are given.

15. Measurement of Electron Antineutrino Oscillation Amplitude and Frequency via Neutron Capture on Hydrogen at Daya Bay.

Author: An FP, Bai WD, Balantekin AB, Bishai M, Blyth S, Cao GF, Cao J, Chang JF, Chang Y, Chen HS, Chen HY, Chen SM, Chen Y, Chen YX, Chen ZY, Cheng J, Cheng J, Cheng YC, Cheng ZK, Cherwinka JJ, Chu MC, Cummings JP, Dalager O, Deng FS, Ding XY, Ding YY, Diwan MV, Dohnal T, Dolzhikov D, Dove J, Dugas KV, Duyang HY, Dwyer DA, Gallo JP, Gonchar M, Gong GH, Gong H, Gu WQ, Guo JY, Guo L, Guo XH, Guo YH, Guo Z, Hackenburg RW, Han Y, Hans S, He M, Heeger KM, Heng YK, Hor YK, Hsiung YB, Hu BZ, Hu JR, Hu T, Hu ZJ, Huang HX, Huang JH, Huang XT, Huang YB, Huber P, Jaffe DE, Jen KL, Ji XL, Ji XP, Johnson RA, Jones D, Kang L, Kettell SH, Kohn S, Kramer M, Langford TJ, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li F, Li HL, Li JJ, Li QJ, Li RH, Li S, Li SC, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JC, Liu JL, Liu JX, Lu C, Lu HQ, Luk KB, Ma BZ, Ma XB, Ma XY, Ma YQ, Mandujano RC, Marshall C, McDonald KT, McKeown RD, Meng Y, Napolitano J, Naumov D, Naumova E, Nguyen TMT, Ochoa-Ricoux JP, Olshevskiy A, Park J, Patton S, Peng JC, Pun CSJ, Qi FZ, Qi M, Qian X, Raper N, Ren J, Morales Reveco C, Rosero R, Roskovec B, Ruan XC, Russell B, Steiner H, Sun JL, Tmej T, Treskov K, Tse WH, Tull CE, Tung YC, Viren B, Vorobel V, Wang CH, Wang J, Wang M, Wang NY, Wang RG, Wang W, Wang X, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wei LH, Wei W, Wen LJ, Whisnant K, White CG, Wong HLH, Worcester E, Wu DR, Wu Q, Wu WJ, Xia DM, Xie ZQ, Xing ZZ, Xu HK, Xu JL, Xu T, Xue T, Yang CG, Yang L, Yang YZ, Yao HF, Ye M, Yeh M, Young BL, Yu HZ, Yu ZY, Yue BB, Zavadskyi V, Zeng S, Zeng Y, Zhan L, Zhang C, Zhang FY, Zhang HH, Zhang JL, Zhang JW, Zhang QM, Zhang SQ, Zhang XT, Zhang YM, Zhang YX, Zhang YY, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhao RZ, Zhou L, Zhuang HL, and Zou JH
Abstract: This Letter reports the first measurement of the oscillation amplitude and frequency of reactor antineutrinos at Daya Bay via neutron capture on hydrogen using 1958 days of data. With over 3.6 million signal candidates, an optimized candidate selection, improved treatment of backgrounds and efficiencies, refined energy calibration, and an energy response model for the capture-on-hydrogen sensitive region, the relative ν[over ¯]_{e} rates and energy spectra variation among the near and far detectors gives sin^{2}2θ_{13}=0.0759_{-0.0049}^{+0.0050} and Δm_{32}^{2}=(2.72_{-0.15}^{+0.14})×10^{-3} eV^{2} assuming the normal neutrino mass ordering, and Δm_{32}^{2}=(-2.83_{-0.14}^{+0.15})×10^{-3} eV^{2} for the inverted neutrino mass ordering. This estimate of sin^{2}2θ_{13} is consistent with and essentially independent from the one obtained using the capture-on-gadolinium sample at Daya Bay. The combination of these two results yields sin^{2}2θ_{13}=0.0833±0.0022, which represents an 8% relative improvement in precision regarding the Daya Bay full 3158-day capture-on-gadolinium result.
Published: 2024
Full Text: View/download PDF

16. Search for a Sub-eV Sterile Neutrino Using Daya Bay's Full Dataset.

Author: An FP, Bai WD, Balantekin AB, Bishai M, Blyth S, Cao GF, Cao J, Chang JF, Chang Y, Chen HS, Chen HY, Chen SM, Chen Y, Chen YX, Chen ZY, Cheng J, Cheng YC, Cheng ZK, Cherwinka JJ, Chu MC, Cummings JP, Dalager O, Deng FS, Ding XY, Ding YY, Diwan MV, Dohnal T, Dolzhikov D, Dove J, Dugas KV, Duyang HY, Dwyer DA, Gallo JP, Gonchar M, Gong GH, Gong H, Gu WQ, Guo JY, Guo L, Guo XH, Guo YH, Guo Z, Hackenburg RW, Han Y, Hans S, He M, Heeger KM, Heng YK, Hor YK, Hsiung YB, Hu BZ, Hu JR, Hu T, Hu ZJ, Huang HX, Huang JH, Huang XT, Huang YB, Huber P, Jaffe DE, Jen KL, Ji XL, Ji XP, Johnson RA, Jones D, Kang L, Kettell SH, Kohn S, Kramer M, Langford TJ, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li F, Li HL, Li JJ, Li QJ, Li RH, Li S, Li S, Li SC, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JC, Liu JL, Liu JX, Lu C, Lu HQ, Luk KB, Ma BZ, Ma XB, Ma XY, Ma YQ, Mandujano RC, Marshall C, McDonald KT, McKeown RD, Meng Y, Napolitano J, Naumov D, Naumova E, Nguyen TMT, Ochoa-Ricoux JP, Olshevskiy A, Park J, Patton S, Peng JC, Pun CSJ, Qi FZ, Qi M, Qian X, Raper N, Ren J, Morales Reveco C, Rosero R, Roskovec B, Ruan XC, Russell B, Steiner H, Sun JL, Tmej T, Tse WH, Tull CE, Tung YC, Viren B, Vorobel V, Wang CH, Wang J, Wang M, Wang NY, Wang RG, Wang W, Wang X, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wei LH, Wei W, Wen LJ, Whisnant K, White CG, Wong HLH, Worcester E, Wu DR, Wu Q, Wu WJ, Xia DM, Xie ZQ, Xing ZZ, Xu HK, Xu JL, Xu T, Xue T, Yang CG, Yang L, Yang YZ, Yao HF, Ye M, Yeh M, Young BL, Yu HZ, Yu ZY, Yuan CZ, Yue BB, Zavadskyi V, Zeng S, Zeng Y, Zhan L, Zhang C, Zhang FY, Zhang HH, Zhang JL, Zhang JW, Zhang QM, Zhang SQ, Zhang XT, Zhang YM, Zhang YX, Zhang YY, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhao RZ, Zhou L, Zhuang HL, and Zou JH
Abstract: This Letter presents results of a search for the mixing of a sub-eV sterile neutrino with three active neutrinos based on the full data sample of the Daya Bay Reactor Neutrino Experiment, collected during 3158 days of detector operation, which contains 5.55×10^{6} reactor ν[over ¯]_{e} candidates identified as inverse beta-decay interactions followed by neutron capture on gadolinium. The analysis benefits from a doubling of the statistics of our previous result and from improvements of several important systematic uncertainties. No significant oscillation due to mixing of a sub-eV sterile neutrino with active neutrinos was found. Exclusion limits are set by both Feldman-Cousins and CLs methods. Light sterile neutrino mixing with sin^{2}2θ_{14}≳0.01 can be excluded at 95% confidence level in the region of 0.01 eV^{2}≲|Δm_{41}^{2}|≲0.1 eV^{2}. This result represents the world-leading constraints in the region of 2×10^{-4} eV^{2}≲|Δm_{41}^{2}|≲0.2 eV^{2}.
Published: 2024
Full Text: View/download PDF

17. First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment.

Author: Aalbers J, Akerib DS, Akerlof CW, Al Musalhi AK, Alder F, Alqahtani A, Alsum SK, Amarasinghe CS, Ames A, Anderson TJ, Angelides N, Araújo HM, Armstrong JE, Arthurs M, Azadi S, Bailey AJ, Baker A, Balajthy J, Balashov S, Bang J, Bargemann JW, Barry MJ, Barthel J, Bauer D, Baxter A, Beattie K, Belle J, Beltrame P, Bensinger J, Benson T, Bernard EP, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Birrittella B, Blockinger GM, Boast KE, Boxer B, Bramante R, Brew CAJ, Brás P, Buckley JH, Bugaev VV, Burdin S, Busenitz JK, Buuck M, Cabrita R, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Cascella M, Chan C, Chawla A, Chen H, Cherwinka JJ, Chott NI, Cole A, Coleman J, Converse MV, Cottle A, Cox G, Craddock WW, Creaner O, Curran D, Currie A, Cutter JE, Dahl CE, David A, Davis J, Davison TJR, Delgaudio J, Dey S, de Viveiros L, Dobi A, Dobson JEY, Druszkiewicz E, Dushkin A, Edberg TK, Edwards WR, Elnimr MM, Emmet WT, Eriksen SR, Faham CH, Fan A, Fayer S, Fearon NM, Fiorucci S, Flaecher H, Ford P, Francis VB, Fraser ED, Fruth T, Gaitskell RJ, Gantos NJ, Garcia D, Geffre A, Gehman VM, Genovesi J, Ghag C, Gibbons R, Gibson E, Gilchriese MGD, Gokhale S, Gomber B, Green J, Greenall A, Greenwood S, van der Grinten MGD, Gwilliam CB, Hall CR, Hans S, Hanzel K, Harrison A, Hartigan-O'Connor E, Haselschwardt SJ, Hernandez MA, Hertel SA, Heuermann G, Hjemfelt C, Hoff MD, Holtom E, Hor JY, Horn M, Huang DQ, Hunt D, Ignarra CM, Jacobsen RG, Jahangir O, James RS, Jeffery SN, Ji W, Johnson J, Kaboth AC, Kamaha AC, Kamdin K, Kasey V, Kazkaz K, Keefner J, Khaitan D, Khaleeq M, Khazov A, Khurana I, Kim YD, Kocher CD, Kodroff D, Korley L, Korolkova EV, Kras J, Kraus H, Kravitz S, Krebs HJ, Kreczko L, Krikler B, Kudryavtsev VA, Kyre S, Landerud B, Leason EA, Lee C, Lee J, Leonard DS, Leonard R, Lesko KT, Levy C, Li J, Liao FT, Liao J, Lin J, Lindote A, Linehan R, Lippincott WH, Liu R, Liu X, Liu Y, Loniewski C, Lopes MI, Lopez Asamar E, López Paredes B, Lorenzon W, Lucero D, Luitz S, Lyle JM, Majewski PA, Makkinje J, Malling DC, Manalaysay A, Manenti L, Mannino RL, Marangou N, Marzioni MF, Maupin C, McCarthy ME, McConnell CT, McKinsey DN, McLaughlin J, Meng Y, Migneault J, Miller EH, Mizrachi E, Mock JA, Monte A, Monzani ME, Morad JA, Morales Mendoza JD, Morrison E, Mount BJ, Murdy M, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nehrkorn C, Neves F, Nguyen A, Nikoleyczik JA, Nilima A, O'Dell J, O'Neill FG, O'Sullivan K, Olcina I, Olevitch MA, Oliver-Mallory KC, Orpwood J, Pagenkopf D, Pal S, Palladino KJ, Palmer J, Pangilinan M, Parveen N, Patton SJ, Pease EK, Penning B, Pereira C, Pereira G, Perry E, Pershing T, Peterson IB, Piepke A, Podczerwinski J, Porzio D, Powell S, Preece RM, Pushkin K, Qie Y, Ratcliff BN, Reichenbacher J, Reichhart L, Rhyne CA, Richards A, Riffard Q, Rischbieter GRC, Rodrigues JP, Rodriguez A, Rose HJ, Rosero R, Rossiter P, Rushton T, Rutherford G, Rynders D, Saba JS, Santone D, Sazzad ABMR, Schnee RW, Scovell PR, Seymour D, Shaw S, Shutt T, Silk JJ, Silva C, Sinev G, Skarpaas K, Skulski W, Smith R, Solmaz M, Solovov VN, Sorensen P, Soria J, Stancu I, Stark MR, Stevens A, Stiegler TM, Stifter K, Studley R, Suerfu B, Sumner TJ, Sutcliffe P, Swanson N, Szydagis M, Tan M, Taylor DJ, Taylor R, Taylor WC, Temples DJ, Tennyson BP, Terman PA, Thomas KJ, Tiedt DR, Timalsina M, To WH, Tomás A, Tong Z, Tovey DR, Tranter J, Trask M, Tripathi M, Tronstad DR, Tull CE, Turner W, Tvrznikova L, Utku U, Va'vra J, Vacheret A, Vaitkus AC, Verbus JR, Voirin E, Waldron WL, Wang A, Wang B, Wang JJ, Wang W, Wang Y, Watson JR, Webb RC, White A, White DT, White JT, White RG, Whitis TJ, Williams M, Wisniewski WJ, Witherell MS, Wolfs FLH, Wolfs JD, Woodford S, Woodward D, Worm SD, Wright CJ, Xia Q, Xiang X, Xiao Q, Xu J, Yeh M, Yin J, Young I, Zarzhitsky P, Zuckerman A, and Zweig EA
Abstract: The LUX-ZEPLIN experiment is a dark matter detector centered on a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. This Letter reports results from LUX-ZEPLIN's first search for weakly interacting massive particles (WIMPs) with an exposure of 60 live days using a fiducial mass of 5.5 t. A profile-likelihood ratio analysis shows the data to be consistent with a background-only hypothesis, setting new limits on spin-independent WIMP-nucleon, spin-dependent WIMP-neutron, and spin-dependent WIMP-proton cross sections for WIMP masses above 9 GeV/c^{2}. The most stringent limit is set for spin-independent scattering at 36 GeV/c^{2}, rejecting cross sections above 9.2×10^{-48} cm at the 90% confidence level.
Published: 2023
Full Text: View/download PDF

18. Improved Measurement of the Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay.

Author: An FP, Bai WD, Balantekin AB, Bishai M, Blyth S, Cao GF, Cao J, Chang JF, Chang Y, Chen HS, Chen HY, Chen SM, Chen Y, Chen YX, Cheng J, Cheng J, Cheng YC, Cheng ZK, Cherwinka JJ, Chu MC, Cummings JP, Dalager O, Deng FS, Ding YY, Diwan MV, Dohnal T, Dolzhikov D, Dove J, Dugas KV, Duyang HY, Dwyer DA, Gallo JP, Gonchar M, Gong GH, Gong H, Gu WQ, Guo JY, Guo L, Guo XH, Guo YH, Guo Z, Hackenburg RW, Han Y, Hans S, He M, Heeger KM, Heng YK, Hor YK, Hsiung YB, Hu BZ, Hu JR, Hu T, Hu ZJ, Huang HX, Huang JH, Huang XT, Huang YB, Huber P, Jaffe DE, Jen KL, Ji XL, Ji XP, Johnson RA, Jones D, Kang L, Kettell SH, Kohn S, Kramer M, Langford TJ, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li F, Li HL, Li JJ, Li QJ, Li RH, Li S, Li SC, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JC, Liu JL, Liu JX, Lu C, Lu HQ, Luk KB, Ma BZ, Ma XB, Ma XY, Ma YQ, Mandujano RC, Marshall C, McDonald KT, McKeown RD, Meng Y, Napolitano J, Naumov D, Naumova E, Nguyen TMT, Ochoa-Ricoux JP, Olshevskiy A, Park J, Patton S, Peng JC, Pun CSJ, Qi FZ, Qi M, Qian X, Raper N, Ren J, Morales Reveco C, Rosero R, Roskovec B, Ruan XC, Russell B, Steiner H, Sun JL, Tmej T, Treskov K, Tse WH, Tull CE, Tung YC, Viren B, Vorobel V, Wang CH, Wang J, Wang M, Wang NY, Wang RG, Wang W, Wang X, Wang Y, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wei LH, Wen LJ, Whisnant K, White CG, Wong HLH, Worcester E, Wu DR, Wu Q, Wu WJ, Xia DM, Xie ZQ, Xing ZZ, Xu HK, Xu JL, Xu T, Xue T, Yang CG, Yang L, Yang YZ, Yao HF, Ye M, Yeh M, Young BL, Yu HZ, Yu ZY, Yue BB, Zavadskyi V, Zeng S, Zeng Y, Zhan L, Zhang C, Zhang FY, Zhang HH, Zhang JL, Zhang JW, Zhang QM, Zhang SQ, Zhang XT, Zhang YM, Zhang YX, Zhang YY, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhao RZ, Zhou L, Zhuang HL, and Zou JH
Subjects: Uranium, Nuclear Reactors
Abstract: Reactor neutrino experiments play a crucial role in advancing our knowledge of neutrinos. In this Letter, the evolution of the flux and spectrum as a function of the reactor isotopic content is reported in terms of the inverse-beta-decay yield at Daya Bay with 1958 days of data and improved systematic uncertainties. These measurements are compared with two signature model predictions: the Huber-Mueller model based on the conversion method and the SM2018 model based on the summation method. The measured average flux and spectrum, as well as the flux evolution with the ^{239}Pu isotopic fraction, are inconsistent with the predictions of the Huber-Mueller model. In contrast, the SM2018 model is shown to agree with the average flux and its evolution but fails to describe the energy spectrum. Altering the predicted inverse-beta-decay spectrum from ^{239}Pu fission does not improve the agreement with the measurement for either model. The models can be brought into better agreement with the measurements if either the predicted spectrum due to ^{235}U fission is changed or the predicted ^{235}U, ^{238}U, ^{239}Pu, and ^{241}Pu spectra are changed in equal measure.
Published: 2023
Full Text: View/download PDF

19. Precision Measurement of Reactor Antineutrino Oscillation at Kilometer-Scale Baselines by Daya Bay.

Author: An FP, Bai WD, Balantekin AB, Bishai M, Blyth S, Cao GF, Cao J, Chang JF, Chang Y, Chen HS, Chen HY, Chen SM, Chen Y, Chen YX, Chen ZY, Cheng J, Cheng ZK, Cherwinka JJ, Chu MC, Cummings JP, Dalager O, Deng FS, Ding YY, Ding XY, Diwan MV, Dohnal T, Dolzhikov D, Dove J, Duyang HY, Dwyer DA, Gallo JP, Gonchar M, Gong GH, Gong H, Gu WQ, Guo JY, Guo L, Guo XH, Guo YH, Guo Z, Hackenburg RW, Han Y, Hans S, He M, Heeger KM, Heng YK, Hor YK, Hsiung YB, Hu BZ, Hu JR, Hu T, Hu ZJ, Huang HX, Huang JH, Huang XT, Huang YB, Huber P, Jaffe DE, Jen KL, Ji XL, Ji XP, Johnson RA, Jones D, Kang L, Kettell SH, Kohn S, Kramer M, Langford TJ, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li F, Li HL, Li JJ, Li QJ, Li RH, Li S, Li SC, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JC, Liu JL, Liu JX, Lu C, Lu HQ, Luk KB, Ma BZ, Ma XB, Ma XY, Ma YQ, Mandujano RC, Marshall C, McDonald KT, McKeown RD, Meng Y, Napolitano J, Naumov D, Naumova E, Nguyen TMT, Ochoa-Ricoux JP, Olshevskiy A, Pan HR, Park J, Patton S, Peng JC, Pun CSJ, Qi FZ, Qi M, Qian X, Raper N, Ren J, Morales Reveco C, Rosero R, Roskovec B, Ruan XC, Russell B, Steiner H, Sun JL, Tmej T, Treskov K, Tse WH, Tull CE, Viren B, Vorobel V, Wang CH, Wang J, Wang M, Wang NY, Wang RG, Wang W, Wang X, Wang Y, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wei LH, Wei W, Wen LJ, Whisnant K, White CG, Wong HLH, Worcester E, Wu DR, Wu Q, Wu WJ, Xia DM, Xie ZQ, Xing ZZ, Xu HK, Xu JL, Xu T, Xue T, Yang CG, Yang L, Yang YZ, Yao HF, Ye M, Yeh M, Young BL, Yu HZ, Yu ZY, Yue BB, Zavadskyi V, Zeng S, Zeng Y, Zhan L, Zhang C, Zhang FY, Zhang HH, Zhang JL, Zhang JW, Zhang QM, Zhang SQ, Zhang XT, Zhang YM, Zhang YX, Zhang YY, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhao RZ, Zhou L, Zhuang HL, and Zou JH
Abstract: We present a new determination of the smallest neutrino mixing angle θ_{13} and the mass-squared difference Δm_{32}^{2} using a final sample of 5.55×10^{6} inverse beta-decay (IBD) candidates with the final-state neutron captured on gadolinium. This sample is selected from the complete dataset obtained by the Daya Bay reactor neutrino experiment in 3158 days of operation. Compared to the previous Daya Bay results, selection of IBD candidates has been optimized, energy calibration refined, and treatment of backgrounds further improved. The resulting oscillation parameters are sin^{2}2θ_{13}=0.0851±0.0024, Δm_{32}^{2}=(2.466±0.060)×10^{-3} eV^{2} for the normal mass ordering or Δm_{32}^{2}=-(2.571±0.060)×10^{-3} eV^{2} for the inverted mass ordering.
Published: 2023
Full Text: View/download PDF

20. First Measurement of High-Energy Reactor Antineutrinos at Daya Bay.

Author: An FP, Bai WD, Balantekin AB, Bishai M, Blyth S, Cao GF, Cao J, Chang JF, Chang Y, Chen HS, Chen HY, Chen SM, Chen Y, Chen YX, Cheng J, Cheng ZK, Cherwinka JJ, Chu MC, Cummings JP, Dalager O, Deng FS, Ding YY, Diwan MV, Dohnal T, Dolzhikov D, Dove J, Dwyer DA, Gallo JP, Gonchar M, Gong GH, Gong H, Gu WQ, Guo JY, Guo L, Guo XH, Guo YH, Guo Z, Hackenburg RW, Hans S, He M, Heeger KM, Heng YK, Hor YK, Hsiung YB, Hu BZ, Hu JR, Hu T, Hu ZJ, Huang HX, Huang JH, Huang XT, Huang YB, Huber P, Jaffe DE, Jen KL, Ji XL, Ji XP, Johnson RA, Jones D, Kang L, Kettell SH, Kohn S, Kramer M, Langford TJ, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li F, Li HL, Li JJ, Li QJ, Li RH, Li S, Li SC, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JC, Liu JL, Liu JX, Lu C, Lu HQ, Luk KB, Ma BZ, Ma XB, Ma XY, Ma YQ, Mandujano RC, Marshall C, McDonald KT, McKeown RD, Meng Y, Napolitano J, Naumov D, Naumova E, Nguyen TMT, Ochoa-Ricoux JP, Olshevskiy A, Pan HR, Park J, Patton S, Peng JC, Pun CSJ, Qi FZ, Qi M, Qian X, Raper N, Ren J, Morales Reveco C, Rosero R, Roskovec B, Ruan XC, Steiner H, Sun JL, Tmej T, Treskov K, Tse WH, Tull CE, Viren B, Vorobel V, Wang CH, Wang J, Wang M, Wang NY, Wang RG, Wang W, Wang X, Wang Y, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wei LH, Wen LJ, Whisnant K, White CG, Wong HLH, Worcester E, Wu DR, Wu Q, Wu WJ, Xia DM, Xie ZQ, Xing ZZ, Xu HK, Xu JL, Xu T, Xue T, Yang CG, Yang L, Yang YZ, Yao HF, Ye M, Yeh M, Young BL, Yu HZ, Yu ZY, Yue BB, Zavadskyi V, Zeng S, Zeng Y, Zhan L, Zhang C, Zhang FY, Zhang HH, Zhang JL, Zhang JW, Zhang QM, Zhang SQ, Zhang XT, Zhang YM, Zhang YX, Zhang YY, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhao RZ, Zhou L, Zhuang HL, and Zou JH
Abstract: This Letter reports the first measurement of high-energy reactor antineutrinos at Daya Bay, with nearly 9000 inverse beta decay candidates in the prompt energy region of 8-12 MeV observed over 1958 days of data collection. A multivariate analysis is used to separate 2500 signal events from background statistically. The hypothesis of no reactor antineutrinos with neutrino energy above 10 MeV is rejected with a significance of 6.2 standard deviations. A 29% antineutrino flux deficit in the prompt energy region of 8-11 MeV is observed compared to a recent model prediction. We provide the unfolded antineutrino spectrum above 7 MeV as a data-based reference for other experiments. This result provides the first direct observation of the production of antineutrinos from several high-Q_{β} isotopes in commercial reactors.
Published: 2022
Full Text: View/download PDF

21. Joint Determination of Reactor Antineutrino Spectra from ^{235}U and ^{239}Pu Fission by Daya Bay and PROSPECT.

Author: An FP, Andriamirado M, Balantekin AB, Band HR, Bass CD, Bergeron DE, Berish D, Bishai M, Blyth S, Bowden NS, Bryan CD, Cao GF, Cao J, Chang JF, Chang Y, Chen HS, Chen SM, Chen Y, Chen YX, Cheng J, Cheng ZK, Cherwinka JJ, Chu MC, Classen T, Conant AJ, Cummings JP, Dalager O, Deichert G, Delgado A, Deng FS, Ding YY, Diwan MV, Dohnal T, Dolinski MJ, Dolzhikov D, Dove J, Dvořák M, Dwyer DA, Erickson A, Foust BT, Gaison JK, Galindo-Uribarri A, Gallo JP, Gilbert CE, Gonchar M, Gong GH, Gong H, Grassi M, Gu WQ, Guo JY, Guo L, Guo XH, Guo YH, Guo Z, Hackenburg RW, Hans S, Hansell AB, He M, Heeger KM, Heffron B, Heng YK, Hor YK, Hsiung YB, Hu BZ, Hu JR, Hu T, Hu ZJ, Huang HX, Huang JH, Huang XT, Huang YB, Huber P, Koblanski J, Jaffe DE, Jayakumar S, Jen KL, Ji XL, Ji XP, Johnson RA, Jones DC, Kang L, Kettell SH, Kohn S, Kramer M, Kyzylova O, Lane CE, Langford TJ, LaRosa J, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li F, Li HL, Li JJ, Li QJ, Li RH, Li S, Li SC, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JC, Liu JL, Liu JX, Lu C, Lu HQ, Lu X, Luk KB, Ma BZ, Ma XB, Ma XY, Ma YQ, Mandujano RC, Maricic J, Marshall C, McDonald KT, McKeown RD, Mendenhall MP, Meng Y, Meyer AM, Milincic R, Mueller PE, Mumm HP, Napolitano J, Naumov D, Naumova E, Neilson R, Nguyen TMT, Nikkel JA, Nour S, Ochoa-Ricoux JP, Olshevskiy A, Palomino JL, Pan HR, Park J, Patton S, Peng JC, Pun CSJ, Pushin DA, Qi FZ, Qi M, Qian X, Raper N, Ren J, Morales Reveco C, Rosero R, Roskovec B, Ruan XC, Searles M, Steiner H, Sun JL, Surukuchi PT, Tmej T, Treskov K, Tse WH, Tull CE, Tyra MA, Varner RL, Venegas-Vargas D, Viren B, Vorobel V, Wang CH, Wang J, Wang M, Wang NY, Wang RG, Wang W, Wang W, Wang X, Wang Y, Wang YF, Wang Z, Wang Z, Wang ZM, Weatherly PB, Wei HY, Wei LH, Wen LJ, Whisnant K, White C, Wilhelmi J, Wong HLH, Woolverton A, Worcester E, Wu DR, Wu FL, Wu Q, Wu WJ, Xia DM, Xie ZQ, Xing ZZ, Xu HK, Xu JL, Xu T, Xue T, Yang CG, Yang L, Yang YZ, Yao HF, Ye M, Yeh M, Young BL, Yu HZ, Yu ZY, Yue BB, Zavadskyi V, Zeng S, Zeng Y, Zhan L, Zhang C, Zhang FY, Zhang HH, Zhang JW, Zhang QM, Zhang SQ, Zhang X, Zhang XT, Zhang YM, Zhang YX, Zhang YY, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhao RZ, Zhou L, Zhuang HL, and Zou JH
Abstract: A joint determination of the reactor antineutrino spectra resulting from the fission of ^{235}U and ^{239}Pu has been carried out by the Daya Bay and PROSPECT Collaborations. This Letter reports the level of consistency of ^{235}U spectrum measurements from the two experiments and presents new results from a joint analysis of both data sets. The measurements are found to be consistent. The combined analysis reduces the degeneracy between the dominant ^{235}U and ^{239}Pu isotopes and improves the uncertainty of the ^{235}U spectral shape to about 3%. The ^{235}U and ^{239}Pu antineutrino energy spectra are unfolded from the jointly deconvolved reactor spectra using the Wiener-SVD unfolding method, providing a data-based reference for other reactor antineutrino experiments and other applications. This is the first measurement of the ^{235}U and ^{239}Pu spectra based on the combination of experiments at low- and highly enriched uranium reactors.
Published: 2022
Full Text: View/download PDF

22. Improved Constraints on Sterile Neutrino Mixing from Disappearance Searches in the MINOS, MINOS+, Daya Bay, and Bugey-3 Experiments.

Author: Adamson P, An FP, Anghel I, Aurisano A, Balantekin AB, Band HR, Barr G, Bishai M, Blake A, Blyth S, Cao GF, Cao J, Cao SV, Carroll TJ, Castromonte CM, Chang JF, Chang Y, Chen HS, Chen R, Chen SM, Chen Y, Chen YX, Cheng J, Cheng ZK, Cherwinka JJ, Childress S, Chu MC, Chukanov A, Coelho JAB, Cummings JP, Dash N, De Rijck S, Deng FS, Ding YY, Diwan MV, Dohnal T, Dolzhikov D, Dove J, Dvořák M, Dwyer DA, Evans JJ, Feldman GJ, Flanagan W, Gabrielyan M, Gallo JP, Germani S, Gomes RA, Gonchar M, Gong GH, Gong H, Gouffon P, Graf N, Grzelak K, Gu WQ, Guo JY, Guo L, Guo XH, Guo YH, Guo Z, Habig A, Hackenburg RW, Hahn SR, Hans S, Hartnell J, Hatcher R, He M, Heeger KM, Heng YK, Higuera A, Holin A, Hor YK, Hsiung YB, Hu BZ, Hu JR, Hu T, Hu ZJ, Huang HX, Huang J, Huang XT, Huang YB, Huber P, Jaffe DE, Jen KL, Ji XL, Ji XP, Johnson RA, Jones D, Kang L, Kettell SH, Koerner LW, Kohn S, Kordosky M, Kramer M, Kreymer A, Lang K, Langford TJ, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li F, Li HL, Li JJ, Li QJ, Li S, Li SC, Li SJ, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JC, Liu JL, Liu Y, Liu YH, Lu C, Lu HQ, Lu JS, Lucas P, Luk KB, Ma XB, Ma XY, Ma YQ, Mann WA, Marshak ML, Marshall C, Martinez Caicedo DA, Mayer N, McDonald KT, McKeown RD, Mehdiyev R, Meier JR, Meng Y, Miller WH, Mills G, Mora Lepin L, Naples D, Napolitano J, Naumov D, Naumova E, Nelson JK, Nichol RJ, O'Connor J, Ochoa-Ricoux JP, Olshevskiy A, Pahlka RB, Pan HR, Park J, Patton S, Pavlović Ž, Pawloski G, Peng JC, Perch A, Pfützner MM, Phan DD, Plunkett RK, Poonthottathil N, Pun CSJ, Qi FZ, Qi M, Qian X, Qiu X, Radovic A, Raper N, Ren J, Reveco CM, Rosero R, Roskovec B, Ruan XC, Sail P, Sanchez MC, Schneps J, Schreckenberger A, Shaheed N, Sharma R, Sousa A, Steiner H, Sun JL, Tagg N, Thomas J, Thomson MA, Timmons A, Tmej T, Todd J, Tognini SC, Toner R, Torretta D, Treskov K, Tse WH, Tull CE, Vahle P, Viren B, Vorobel V, Wang CH, Wang J, Wang M, Wang NY, Wang RG, Wang W, Wang W, Wang X, Wang Y, Wang YF, Wang Z, Wang Z, Wang ZM, Weber A, Wei HY, Wei LH, Wen LJ, Whisnant K, White C, Whitehead LH, Wojcicki SG, Wong HLH, Wong SCF, Worcester E, Wu DR, Wu FL, Wu Q, Wu WJ, Xia DM, Xie ZQ, Xing ZZ, Xu JL, Xu T, Xue T, Yang CG, Yang L, Yang YZ, Yao HF, Ye M, Yeh M, Young BL, Yu HZ, Yu ZY, Yue BB, Zeng S, Zeng Y, Zhan L, Zhang C, Zhang FY, Zhang HH, Zhang JW, Zhang QM, Zhang XT, Zhang YM, Zhang YX, Zhang YY, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhou L, and Zhuang HL
Abstract: Searches for electron antineutrino, muon neutrino, and muon antineutrino disappearance driven by sterile neutrino mixing have been carried out by the Daya Bay and MINOS+ collaborations. This Letter presents the combined results of these searches, along with exclusion results from the Bugey-3 reactor experiment, framed in a minimally extended four-neutrino scenario. Significantly improved constraints on the θ_{μe} mixing angle are derived that constitute the most constraining limits to date over five orders of magnitude in the mass-squared splitting Δm_{41}^{2}, excluding the 90% C.L. sterile-neutrino parameter space allowed by the LSND and MiniBooNE observations at 90% CL_{s} for Δm_{41}^{2}<13 eV^{2}. Furthermore, the LSND and MiniBooNE 99% C.L. allowed regions are excluded at 99% CL_{s} for Δm_{41}^{2}<1.6 eV^{2}.
Published: 2020
Full Text: View/download PDF

23. Extraction of the ^{235}U and ^{239}Pu Antineutrino Spectra at Daya Bay.

Author: Adey D, An FP, Balantekin AB, Band HR, Bishai M, Blyth S, Cao D, Cao GF, Cao J, Chang JF, Chang Y, Chen HS, Chen SM, Chen Y, Chen YX, Cheng J, Cheng ZK, Cherwinka JJ, Chu MC, Chukanov A, Cummings JP, Dash N, Deng FS, Ding YY, Diwan MV, Dohnal T, Dove J, Dvořák M, Dwyer DA, Gonchar M, Gong GH, Gong H, Gu WQ, Guo JY, Guo L, Guo XH, Guo YH, Guo Z, Hackenburg RW, Hans S, He M, Heeger KM, Heng YK, Higuera A, Hor YK, Hsiung YB, Hu BZ, Hu JR, Hu T, Hu ZJ, Huang HX, Huang XT, Huang YB, Huber P, Jaffe DE, Jen KL, Ji XL, Ji XP, Johnson RA, Jones D, Kang L, Kettell SH, Koerner LW, Kohn S, Kramer M, Langford TJ, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li C, Li F, Li HL, Li QJ, Li S, Li SC, Li SJ, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JC, Liu JL, Liu Y, Liu YH, Lu C, Lu HQ, Lu JS, Luk KB, Ma XB, Ma XY, Ma YQ, Marshall C, Martinez Caicedo DA, McDonald KT, McKeown RD, Mitchell I, Mora Lepin L, Napolitano J, Naumov D, Naumova E, Ochoa-Ricoux JP, Olshevskiy A, Pan HR, Park J, Patton S, Pec V, Peng JC, Pinsky L, Pun CSJ, Qi FZ, Qi M, Qian X, Raper N, Ren J, Rosero R, Roskovec B, Ruan XC, Steiner H, Sun JL, Treskov K, Tse WH, Tull CE, Viren B, Vorobel V, Wang CH, Wang J, Wang M, Wang NY, Wang RG, Wang W, Wang W, Wang X, Wang Y, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wei LH, Wen LJ, Whisnant K, White CG, Wong HLH, Wong SCF, Worcester E, Wu Q, Wu WJ, Xia DM, Xing ZZ, Xu JL, Xue T, Yang CG, Yang L, Yang MS, Yang YZ, Ye M, Yeh M, Young BL, Yu HZ, Yu ZY, Yue BB, Zeng S, Zeng Y, Zhan L, Zhang C, Zhang CC, Zhang FY, Zhang HH, Zhang JW, Zhang QM, Zhang R, Zhang XF, Zhang XT, Zhang YM, Zhang YM, Zhang YX, Zhang YY, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhou L, Zhuang HL, and Zou JH
Abstract: This Letter reports the first extraction of individual antineutrino spectra from ^{235}U and ^{239}Pu fission and an improved measurement of the prompt energy spectrum of reactor antineutrinos at Daya Bay. The analysis uses 3.5×10^{6} inverse beta-decay candidates in four near antineutrino detectors in 1958 days. The individual antineutrino spectra of the two dominant isotopes, ^{235}U and ^{239}Pu, are extracted using the evolution of the prompt spectrum as a function of the isotope fission fractions. In the energy window of 4-6 MeV, a 7% (9%) excess of events is observed for the ^{235}U (^{239}Pu) spectrum compared with the normalized Huber-Mueller model prediction. The significance of discrepancy is 4.0σ for ^{235}U spectral shape compared with the Huber-Mueller model prediction. The shape of the measured inverse beta-decay prompt energy spectrum disagrees with the prediction of the Huber-Mueller model at 5.3σ. In the energy range of 4-6 MeV, a maximal local discrepancy of 6.3σ is observed.
Published: 2019
Full Text: View/download PDF

24. Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay.

Author: Adey D, An FP, Balantekin AB, Band HR, Bishai M, Blyth S, Cao D, Cao GF, Cao J, Chan YL, Chang JF, Chang Y, Chen HS, Chen SM, Chen Y, Chen YX, Cheng J, Cheng ZK, Cherwinka JJ, Chu MC, Chukanov A, Cummings JP, Deng FS, Ding YY, Diwan MV, Dolgareva M, Dwyer DA, Edwards WR, Gonchar M, Gong GH, Gong H, Gu WQ, Guo L, Guo XH, Guo YH, Guo Z, Hackenburg RW, Hans S, He M, Heeger KM, Heng YK, Higuera A, Hsiung YB, Hu BZ, Hu JR, Hu T, Hu ZJ, Huang HX, Huang XT, Huang YB, Huber P, Huo W, Hussain G, Jaffe DE, Jen KL, Ji XL, Ji XP, Johnson RA, Jones D, Kang L, Kettell SH, Koerner LW, Kohn S, Kramer M, Langford TJ, Lebanowski L, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li C, Li F, Li HL, Li QJ, Li S, Li SC, Li SJ, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Lin SK, Lin YC, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JC, Liu JL, Liu Y, Liu YH, Loh CW, Lu C, Lu HQ, Lu JS, Luk KB, Ma XB, Ma XY, Ma YQ, Malyshkin Y, Marshall C, Martinez Caicedo DA, McDonald KT, McKeown RD, Mitchell I, Mora Lepin L, Napolitano J, Naumov D, Naumova E, Ochoa-Ricoux JP, Olshevskiy A, Pan HR, Park J, Patton S, Pec V, Peng JC, Pinsky L, Pun CSJ, Qi FZ, Qi M, Qian X, Qiu RM, Raper N, Ren J, Rosero R, Roskovec B, Ruan XC, Steiner H, Sun JL, Tang W, Taychenachev D, Treskov K, Tse WH, Tull CE, Viren B, Vorobel V, Wang CH, Wang J, Wang M, Wang NY, Wang RG, Wang W, Wang W, Wang X, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wei LH, Wen LJ, Whisnant K, White CG, Wise T, Wong HLH, Wong SCF, Worcester E, Wu Q, Wu WJ, Xia DM, Xing ZZ, Xu JL, Xue T, Yang CG, Yang H, Yang L, Yang MS, Yang MT, Yang YZ, Ye M, Yeh M, Young BL, Yu HZ, Yu ZY, Yue BB, Zeng S, Zhan L, Zhang C, Zhang CC, Zhang FY, Zhang HH, Zhang JW, Zhang QM, Zhang R, Zhang XF, Zhang XT, Zhang YM, Zhang YM, Zhang YX, Zhang YY, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zheng P, Zhou L, Zhuang HL, and Zou JH
Abstract: We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor ν[over ¯]_{e} inverse β decay candidates observed over 1958 days of data collection. The installation of a flash analog-to-digital converter readout system and a special calibration campaign using different source enclosures reduce uncertainties in the absolute energy calibration to less than 0.5% for visible energies larger than 2 MeV. The uncertainty in the cosmogenic ^{9}Li and ^{8}He background is reduced from 45% to 30% in the near detectors. A detailed investigation of the spent nuclear fuel history improves its uncertainty from 100% to 30%. Analysis of the relative ν[over ¯]_{e} rates and energy spectra among detectors yields sin^{2}2θ_{13}=0.0856±0.0029 and Δm_{32}^{2}=(2.471_{-0.070}^{+0.068})×10^{-3} eV^{2} assuming the normal hierarchy, and Δm_{32}^{2}=-(2.575_{-0.070}^{+0.068})×10^{-3} eV^{2} assuming the inverted hierarchy.
Published: 2018
Full Text: View/download PDF

25. Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay.

Author: An FP, Balantekin AB, Band HR, Bishai M, Blyth S, Cao D, Cao GF, Cao J, Chan YL, Chang JF, Chang Y, Chen HS, Chen QY, Chen SM, Chen YX, Chen Y, Cheng J, Cheng ZK, Cherwinka JJ, Chu MC, Chukanov A, Cummings JP, Ding YY, Diwan MV, Dolgareva M, Dove J, Dwyer DA, Edwards WR, Gill R, Gonchar M, Gong GH, Gong H, Grassi M, Gu WQ, Guo L, Guo XH, Guo YH, Guo Z, Hackenburg RW, Hans S, He M, Heeger KM, Heng YK, Higuera A, Hsiung YB, Hu BZ, Hu T, Huang EC, Huang HX, Huang XT, Huang YB, Huber P, Huo W, Hussain G, Jaffe DE, Jen KL, Ji XP, Ji XL, Jiao JB, Johnson RA, Jones D, Kang L, Kettell SH, Khan A, Kohn S, Kramer M, Kwan KK, Kwok MW, Langford TJ, Lau K, Lebanowski L, Lee J, Lee JHC, Lei RT, Leitner R, Leung JKC, Li C, Li DJ, Li F, Li GS, Li QJ, Li S, Li SC, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Lin SK, Lin YC, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu JL, Liu JC, Loh CW, Lu C, Lu HQ, Lu JS, Luk KB, Ma XY, Ma XB, Ma YQ, Malyshkin Y, Martinez Caicedo DA, McDonald KT, McKeown RD, Mitchell I, Nakajima Y, Napolitano J, Naumov D, Naumova E, Ngai HY, Ochoa-Ricoux JP, Olshevskiy A, Pan HR, Park J, Patton S, Pec V, Peng JC, Pinsky L, Pun CSJ, Qi FZ, Qi M, Qian X, Qiu RM, Raper N, Ren J, Rosero R, Roskovec B, Ruan XC, Steiner H, Stoler P, Sun JL, Tang W, Taychenachev D, Treskov K, Tsang KV, Tull CE, Viaux N, Viren B, Vorobel V, Wang CH, Wang M, Wang NY, Wang RG, Wang W, Wang X, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wen LJ, Whisnant K, White CG, Whitehead L, Wise T, Wong HLH, Wong SCF, Worcester E, Wu CH, Wu Q, Wu WJ, Xia DM, Xia JK, Xing ZZ, Xu JL, Xu Y, Xue T, Yang CG, Yang H, Yang L, Yang MS, Yang MT, Yang YZ, Ye M, Ye Z, Yeh M, Young BL, Yu ZY, Zeng S, Zhan L, Zhang C, Zhang CC, Zhang HH, Zhang JW, Zhang QM, Zhang R, Zhang XT, Zhang YM, Zhang YX, Zhang YM, Zhang ZJ, Zhang ZY, Zhang ZP, Zhao J, Zhou L, Zhuang HL, and Zou JH
Abstract: The Daya Bay experiment has observed correlations between reactor core fuel evolution and changes in the reactor antineutrino flux and energy spectrum. Four antineutrino detectors in two experimental halls were used to identify 2.2 million inverse beta decays (IBDs) over 1230 days spanning multiple fuel cycles for each of six 2.9 GW_{th} reactor cores at the Daya Bay and Ling Ao nuclear power plants. Using detector data spanning effective ^{239}Pu fission fractions F_{239} from 0.25 to 0.35, Daya Bay measures an average IBD yield σ[over ¯]_{f} of (5.90±0.13)×10^{-43} cm^{2}/fission and a fuel-dependent variation in the IBD yield, dσ_{f}/dF_{239}, of (-1.86±0.18)×10^{-43} cm^{2}/fission. This observation rejects the hypothesis of a constant antineutrino flux as a function of the ^{239}Pu fission fraction at 10 standard deviations. The variation in IBD yield is found to be energy dependent, rejecting the hypothesis of a constant antineutrino energy spectrum at 5.1 standard deviations. While measurements of the evolution in the IBD spectrum show general agreement with predictions from recent reactor models, the measured evolution in total IBD yield disagrees with recent predictions at 3.1σ. This discrepancy indicates that an overall deficit in the measured flux with respect to predictions does not result from equal fractional deficits from the primary fission isotopes ^{235}U, ^{239}Pu, ^{238}U, and ^{241}Pu. Based on measured IBD yield variations, yields of (6.17±0.17) and (4.27±0.26)×10^{-43} cm^{2}/fission have been determined for the two dominant fission parent isotopes ^{235}U and ^{239}Pu. A 7.8% discrepancy between the observed and predicted ^{235}U yields suggests that this isotope may be the primary contributor to the reactor antineutrino anomaly.
Published: 2017
Full Text: View/download PDF

26. Limits on Active to Sterile Neutrino Oscillations from Disappearance Searches in the MINOS, Daya Bay, and Bugey-3 Experiments.

Author: Adamson P, An FP, Anghel I, Aurisano A, Balantekin AB, Band HR, Barr G, Bishai M, Blake A, Blyth S, Bock GJ, Bogert D, Cao D, Cao GF, Cao J, Cao SV, Carroll TJ, Castromonte CM, Cen WR, Chan YL, Chang JF, Chang LC, Chang Y, Chen HS, Chen QY, Chen R, Chen SM, Chen Y, Chen YX, Cheng J, Cheng JH, Cheng YP, Cheng ZK, Cherwinka JJ, Childress S, Chu MC, Chukanov A, Coelho JA, Corwin L, Cronin-Hennessy D, Cummings JP, de Arcos J, De Rijck S, Deng ZY, Devan AV, Devenish NE, Ding XF, Ding YY, Diwan MV, Dolgareva M, Dove J, Dwyer DA, Edwards WR, Escobar CO, Evans JJ, Falk E, Feldman GJ, Flanagan W, Frohne MV, Gabrielyan M, Gallagher HR, Germani S, Gill R, Gomes RA, Gonchar M, Gong GH, Gong H, Goodman MC, Gouffon P, Graf N, Gran R, Grassi M, Grzelak K, Gu WQ, Guan MY, Guo L, Guo RP, Guo XH, Guo Z, Habig A, Hackenburg RW, Hahn SR, Han R, Hans S, Hartnell J, Hatcher R, He M, Heeger KM, Heng YK, Higuera A, Holin A, Hor YK, Hsiung YB, Hu BZ, Hu T, Hu W, Huang EC, Huang HX, Huang J, Huang XT, Huber P, Huo W, Hussain G, Hylen J, Irwin GM, Isvan Z, Jaffe DE, Jaffke P, James C, Jen KL, Jensen D, Jetter S, Ji XL, Ji XP, Jiao JB, Johnson RA, de Jong JK, Joshi J, Kafka T, Kang L, Kasahara SM, Kettell SH, Kohn S, Koizumi G, Kordosky M, Kramer M, Kreymer A, Kwan KK, Kwok MW, Kwok T, Lang K, Langford TJ, Lau K, Lebanowski L, Lee J, Lee JH, Lei RT, Leitner R, Leung JK, Li C, Li DJ, Li F, Li GS, Li QJ, Li S, Li SC, Li WD, Li XN, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Lin SK, Lin YC, Ling JJ, Link JM, Litchfield PJ, Littenberg L, Littlejohn BR, Liu DW, Liu JC, Liu JL, Loh CW, Lu C, Lu HQ, Lu JS, Lucas P, Luk KB, Lv Z, Ma QM, Ma XB, Ma XY, Ma YQ, Malyshkin Y, Mann WA, Marshak ML, Martinez Caicedo DA, Mayer N, McDonald KT, McGivern C, McKeown RD, Medeiros MM, Mehdiyev R, Meier JR, Messier MD, Miller WH, Mishra SR, Mitchell I, Mooney M, Moore CD, Mualem L, Musser J, Nakajima Y, Naples D, Napolitano J, Naumov D, Naumova E, Nelson JK, Newman HB, Ngai HY, Nichol RJ, Ning Z, Nowak JA, O'Connor J, Ochoa-Ricoux JP, Olshevskiy A, Orchanian M, Pahlka RB, Paley J, Pan HR, Park J, Patterson RB, Patton S, Pawloski G, Pec V, Peng JC, Perch A, Pfützner MM, Phan DD, Phan-Budd S, Pinsky L, Plunkett RK, Poonthottathil N, Pun CS, Qi FZ, Qi M, Qian X, Qiu X, Radovic A, Raper N, Rebel B, Ren J, Rosenfeld C, Rosero R, Roskovec B, Ruan XC, Rubin HA, Sail P, Sanchez MC, Schneps J, Schreckenberger A, Schreiner P, Sharma R, Moed Sher S, Sousa A, Steiner H, Sun GX, Sun JL, Tagg N, Talaga RL, Tang W, Taychenachev D, Thomas J, Thomson MA, Tian X, Timmons A, Todd J, Tognini SC, Toner R, Torretta D, Treskov K, Tsang KV, Tull CE, Tzanakos G, Urheim J, Vahle P, Viaux N, Viren B, Vorobel V, Wang CH, Wang M, Wang NY, Wang RG, Wang W, Wang X, Wang YF, Wang Z, Wang ZM, Webb RC, Weber A, Wei HY, Wen LJ, Whisnant K, White C, Whitehead L, Whitehead LH, Wise T, Wojcicki SG, Wong HL, Wong SC, Worcester E, Wu CH, Wu Q, Wu WJ, Xia DM, Xia JK, Xing ZZ, Xu JL, Xu JY, Xu Y, Xue T, Yang CG, Yang H, Yang L, Yang MS, Yang MT, Ye M, Ye Z, Yeh M, Young BL, Yu ZY, Zeng S, Zhan L, Zhang C, Zhang HH, Zhang JW, Zhang QM, Zhang XT, Zhang YM, Zhang YX, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhao QW, Zhao YB, Zhong WL, Zhou L, Zhou N, Zhuang HL, and Zou JH
Abstract: Searches for a light sterile neutrino have been performed independently by the MINOS and the Daya Bay experiments using the muon (anti)neutrino and electron antineutrino disappearance channels, respectively. In this Letter, results from both experiments are combined with those from the Bugey-3 reactor neutrino experiment to constrain oscillations into light sterile neutrinos. The three experiments are sensitive to complementary regions of parameter space, enabling the combined analysis to probe regions allowed by the Liquid Scintillator Neutrino Detector (LSND) and MiniBooNE experiments in a minimally extended four-neutrino flavor framework. Stringent limits on sin^{2}2θ_{μe} are set over 6 orders of magnitude in the sterile mass-squared splitting Δm_{41}^{2}. The sterile-neutrino mixing phase space allowed by the LSND and MiniBooNE experiments is excluded for Δm_{41}^{2}<0.8 eV^{2} at 95% CL_{s}.
Published: 2016
Full Text: View/download PDF

27. Improved Search for a Light Sterile Neutrino with the Full Configuration of the Daya Bay Experiment.

Author: An FP, Balantekin AB, Band HR, Bishai M, Blyth S, Cao D, Cao GF, Cao J, Cen WR, Chan YL, Chang JF, Chang LC, Chang Y, Chen HS, Chen QY, Chen SM, Chen YX, Chen Y, Cheng JH, Cheng J, Cheng YP, Cheng ZK, Cherwinka JJ, Chu MC, Chukanov A, Cummings JP, de Arcos J, Deng ZY, Ding XF, Ding YY, Diwan MV, Dolgareva M, Dove J, Dwyer DA, Edwards WR, Gill R, Gonchar M, Gong GH, Gong H, Grassi M, Gu WQ, Guan MY, Guo L, Guo RP, Guo XH, Guo Z, Hackenburg RW, Han R, Hans S, He M, Heeger KM, Heng YK, Higuera A, Hor YK, Hsiung YB, Hu BZ, Hu T, Hu W, Huang EC, Huang HX, Huang XT, Huber P, Huo W, Hussain G, Jaffe DE, Jaffke P, Jen KL, Jetter S, Ji XP, Ji XL, Jiao JB, Johnson RA, Joshi J, Kang L, Kettell SH, Kohn S, Kramer M, Kwan KK, Kwok MW, Kwok T, Langford TJ, Lau K, Lebanowski L, Lee J, Lee JH, Lei RT, Leitner R, Leung JK, Li C, Li DJ, Li F, Li GS, Li QJ, Li S, Li SC, Li WD, Li XN, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin S, Lin SK, Lin YC, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu DW, Liu JL, Liu JC, Loh CW, Lu C, Lu HQ, Lu JS, Luk KB, Lv Z, Ma QM, Ma XY, Ma XB, Ma YQ, Malyshkin Y, Martinez Caicedo DA, McDonald KT, McKeown RD, Mitchell I, Mooney M, Nakajima Y, Napolitano J, Naumov D, Naumova E, Ngai HY, Ning Z, Ochoa-Ricoux JP, Olshevskiy A, Pan HR, Park J, Patton S, Pec V, Peng JC, Pinsky L, Pun CS, Qi FZ, Qi M, Qian X, Raper N, Ren J, Rosero R, Roskovec B, Ruan XC, Steiner H, Sun GX, Sun JL, Tang W, Taychenachev D, Treskov K, Tsang KV, Tull CE, Viaux N, Viren B, Vorobel V, Wang CH, Wang M, Wang NY, Wang RG, Wang W, Wang X, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wen LJ, Whisnant K, White CG, Whitehead L, Wise T, Wong HL, Wong SC, Worcester E, Wu CH, Wu Q, Wu WJ, Xia DM, Xia JK, Xing ZZ, Xu JY, Xu JL, Xu Y, Xue T, Yang CG, Yang H, Yang L, Yang MS, Yang MT, Ye M, Ye Z, Yeh M, Young BL, Yu ZY, Zeng S, Zhan L, Zhang C, Zhang HH, Zhang JW, Zhang QM, Zhang XT, Zhang YM, Zhang YX, Zhang YM, Zhang ZJ, Zhang ZY, Zhang ZP, Zhao J, Zhao QW, Zhao YB, Zhong WL, Zhou L, Zhou N, Zhuang HL, and Zou JH
Abstract: This Letter reports an improved search for light sterile neutrino mixing in the electron antineutrino disappearance channel with the full configuration of the Daya Bay Reactor Neutrino Experiment. With an additional 404 days of data collected in eight antineutrino detectors, this search benefits from 3.6 times the statistics available to the previous publication, as well as from improvements in energy calibration and background reduction. A relative comparison of the rate and energy spectrum of reactor antineutrinos in the three experimental halls yields no evidence of sterile neutrino mixing in the 2×10^{-4}≲|Δm_{41}^{2}|≲0.3 eV^{2} mass range. The resulting limits on sin^{2}2θ_{14} are improved by approx imately a factor of 2 over previous results and constitute the most stringent constraints to date in the |Δm_{41}^{2}|≲0.2 eV^{2} region.
Published: 2016
Full Text: View/download PDF

28. Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay.

Author: An FP, Balantekin AB, Band HR, Bishai M, Blyth S, Butorov I, Cao D, Cao GF, Cao J, Cen WR, Chan YL, Chang JF, Chang LC, Chang Y, Chen HS, Chen QY, Chen SM, Chen YX, Chen Y, Cheng JH, Cheng J, Cheng YP, Cherwinka JJ, Chu MC, Cummings JP, de Arcos J, Deng ZY, Ding XF, Ding YY, Diwan MV, Dove J, Draeger E, Dwyer DA, Edwards WR, Ely SR, Gill R, Gonchar M, Gong GH, Gong H, Grassi M, Gu WQ, Guan MY, Guo L, Guo XH, Hackenburg RW, Han R, Hans S, He M, Heeger KM, Heng YK, Higuera A, Hor YK, Hsiung YB, Hu BZ, Hu LM, Hu LJ, Hu T, Hu W, Huang EC, Huang HX, Huang XT, Huber P, Hussain G, Jaffe DE, Jaffke P, Jen KL, Jetter S, Ji XP, Ji XL, Jiao JB, Johnson RA, Kang L, Kettell SH, Kohn S, Kramer M, Kwan KK, Kwok MW, Kwok T, Langford TJ, Lau K, Lebanowski L, Lee J, Lei RT, Leitner R, Leung KY, Leung JK, Lewis CA, Li DJ, Li F, Li GS, Li QJ, Li SC, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin PY, Lin SK, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu DW, Liu H, Liu JL, Liu JC, Liu SS, Lu C, Lu HQ, Lu JS, Luk KB, Ma QM, Ma XY, Ma XB, Ma YQ, Martinez Caicedo DA, McDonald KT, McKeown RD, Meng Y, Mitchell I, Monari Kebwaro J, Nakajima Y, Napolitano J, Naumov D, Naumova E, Ngai HY, Ning Z, Ochoa-Ricoux JP, Olshevski A, Pan HR, Park J, Patton S, Pec V, Peng JC, Piilonen LE, Pinsky L, Pun CS, Qi FZ, Qi M, Qian X, Raper N, Ren B, Ren J, Rosero R, Roskovec B, Ruan XC, Shao BB, Steiner H, Sun GX, Sun JL, Tang W, Taychenachev D, Tsang KV, Tull CE, Tung YC, Viaux N, Viren B, Vorobel V, Wang CH, Wang M, Wang NY, Wang RG, Wang W, Wang WW, Wang X, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wen LJ, Whisnant K, White CG, Whitehead L, Wise T, Wong HL, Wong SC, Worcester E, Wu Q, Xia DM, Xia JK, Xia X, Xing ZZ, Xu JY, Xu JL, Xu J, Xu Y, Xue T, Yan J, Yang CG, Yang L, Yang MS, Yang MT, Ye M, Yeh M, Young BL, Yu GY, Yu ZY, Zang SL, Zhan L, Zhang C, Zhang HH, Zhang JW, Zhang QM, Zhang YM, Zhang YX, Zhang YM, Zhang ZJ, Zhang ZY, Zhang ZP, Zhao J, Zhao QW, Zhao YF, Zhao YB, Zheng L, Zhong WL, Zhou L, Zhou N, Zhuang HL, and Zou JH
Abstract: This Letter reports a measurement of the flux and energy spectrum of electron antineutrinos from six 2.9 GWth nuclear reactors with six detectors deployed in two near (effective baselines 512 and 561 m) and one far (1579 m) underground experimental halls in the Daya Bay experiment. Using 217 days of data, 296 721 and 41 589 inverse β decay (IBD) candidates were detected in the near and far halls, respectively. The measured IBD yield is (1.55±0.04) ×10(-18) cm(2) GW(-1) day(-1) or (5.92±0.14) ×10(-43) cm(2) fission(-1). This flux measurement is consistent with previous short-baseline reactor antineutrino experiments and is 0.946±0.022 (0.991±0.023) relative to the flux predicted with the Huber-Mueller (ILL-Vogel) fissile antineutrino model. The measured IBD positron energy spectrum deviates from both spectral predictions by more than 2σ over the full energy range with a local significance of up to ∼4σ between 4-6 MeV. A reactor antineutrino spectrum of IBD reactions is extracted from the measured positron energy spectrum for model-independent predictions.
Published: 2016
Full Text: View/download PDF

29. New measurement of antineutrino oscillation with the full detector configuration at Daya Bay.

Author: An FP, Balantekin AB, Band HR, Bishai M, Blyth S, Butorov I, Cao GF, Cao J, Cen WR, Chan YL, Chang JF, Chang LC, Chang Y, Chen HS, Chen QY, Chen SM, Chen YX, Chen Y, Cheng JH, Cheng J, Cheng YP, Cherwinka JJ, Chu MC, Cummings JP, de Arcos J, Deng ZY, Ding XF, Ding YY, Diwan MV, Draeger E, Dwyer DA, Edwards WR, Ely SR, Gill R, Gonchar M, Gong GH, Gong H, Grassi M, Gu WQ, Guan MY, Guo L, Guo XH, Hackenburg RW, Han R, Hans S, He M, Heeger KM, Heng YK, Higuera A, Hor YK, Hsiung YB, Hu BZ, Hu LM, Hu LJ, Hu T, Hu W, Huang EC, Huang HX, Huang XT, Huber P, Hussain G, Jaffe DE, Jaffke P, Jen KL, Jetter S, Ji XP, Ji XL, Jiao JB, Johnson RA, Kang L, Kettell SH, Kramer M, Kwan KK, Kwok MW, Kwok T, Langford TJ, Lau K, Lebanowski L, Lee J, Lei RT, Leitner R, Leung KY, Leung JK, Lewis CA, Li DJ, Li F, Li GS, Li QJ, Li SC, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin PY, Lin SK, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu DW, Liu H, Liu JL, Liu JC, Liu SS, Lu C, Lu HQ, Lu JS, Luk KB, Ma QM, Ma XY, Ma XB, Ma YQ, Martinez Caicedo DA, McDonald KT, McKeown RD, Meng Y, Mitchell I, Monari Kebwaro J, Nakajima Y, Napolitano J, Naumov D, Naumova E, Ngai HY, Ning Z, Ochoa-Ricoux JP, Olshevski A, Park J, Patton S, Pec V, Peng JC, Piilonen LE, Pinsky L, Pun CS, Qi FZ, Qi M, Qian X, Raper N, Ren B, Ren J, Rosero R, Roskovec B, Ruan XC, Shao BB, Steiner H, Sun GX, Sun JL, Tang W, Taychenachev D, Themann H, Tsang KV, Tull CE, Tung YC, Viaux N, Viren B, Vorobel V, Wang CH, Wang M, Wang NY, Wang RG, Wang W, Wang WW, Wang X, Wang YF, Wang Z, Wang Z, Wang ZM, Wei HY, Wen LJ, Whisnant K, White CG, Whitehead L, Wise T, Wong HL, Wong SC, Worcester E, Wu Q, Xia DM, Xia JK, Xia X, Xing ZZ, Xu JY, Xu JL, Xu J, Xu Y, Xue T, Yan J, Yang CG, Yang L, Yang MS, Yang MT, Ye M, Yeh M, Yeh YS, Young BL, Yu GY, Yu ZY, Zang SL, Zhan L, Zhang C, Zhang HH, Zhang JW, Zhang QM, Zhang YM, Zhang YX, Zhang YM, Zhang ZJ, Zhang ZY, Zhang ZP, Zhao J, Zhao QW, Zhao YF, Zhao YB, Zheng L, Zhong WL, Zhou L, Zhou N, Zhuang HL, and Zou JH
Abstract: We report a new measurement of electron antineutrino disappearance using the fully constructed Daya Bay Reactor Neutrino Experiment. The final two of eight antineutrino detectors were installed in the summer of 2012. Including the 404 days of data collected from October 2012 to November 2013 resulted in a total exposure of 6.9×10^{5} GW_{th} ton days, a 3.6 times increase over our previous results. Improvements in energy calibration limited variations between detectors to 0.2%. Removal of six ^{241}Am-^{13}C radioactive calibration sources reduced the background by a factor of 2 for the detectors in the experimental hall furthest from the reactors. Direct prediction of the antineutrino signal in the far detectors based on the measurements in the near detectors explicitly minimized the dependence of the measurement on models of reactor antineutrino emission. The uncertainties in our estimates of sin^{2}2θ_{13} and |Δm_{ee}^{2}| were halved as a result of these improvements. An analysis of the relative antineutrino rates and energy spectra between detectors gave sin^{2}2θ_{13}=0.084±0.005 and |Δm_{ee}^{2}|=(2.42±0.11)×10^{-3} eV^{2} in the three-neutrino framework.
Published: 2015
Full Text: View/download PDF

30. Search for a light sterile neutrino at Daya Bay.

Author: An FP, Balantekin AB, Band HR, Beriguete W, Bishai M, Blyth S, Butorov I, Cao GF, Cao J, Chan YL, Chang JF, Chang LC, Chang Y, Chasman C, Chen H, Chen QY, Chen SM, Chen X, Chen X, Chen YX, Chen Y, Cheng YP, Cherwinka JJ, Chu MC, Cummings JP, de Arcos J, Deng ZY, Ding YY, Diwan MV, Draeger E, Du XF, Dwyer DA, Edwards WR, Ely SR, Fu JY, Ge LQ, Gill R, Gonchar M, Gong GH, Gong H, Grassi M, Gu WQ, Guan MY, Guo XH, Hackenburg RW, Han GH, Hans S, He M, Heeger KM, Heng YK, Hinrichs P, Hor YK, Hsiung YB, Hu BZ, Hu LM, Hu LJ, Hu T, Hu W, Huang EC, Huang H, Huang XT, Huber P, Hussain G, Isvan Z, Jaffe DE, Jaffke P, Jen KL, Jetter S, Ji XP, Ji XL, Jiang HJ, Jiao JB, Johnson RA, Kang L, Kettell SH, Kramer M, Kwan KK, Kwok MW, Kwok T, Lai WC, Lau K, Lebanowski L, Lee J, Lei RT, Leitner R, Leung A, Leung JK, Lewis CA, Li DJ, Li F, Li GS, Li QJ, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin PY, Lin SK, Lin YC, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu DW, Liu H, Liu JL, Liu JC, Liu SS, Liu YB, Lu C, Lu HQ, Luk KB, Ma QM, Ma XY, Ma XB, Ma YQ, McDonald KT, McFarlane MC, McKeown RD, Meng Y, Mitchell I, Monari Kebwaro J, Nakajima Y, Napolitano J, Naumov D, Naumova E, Nemchenok I, Ngai HY, Ning Z, Ochoa-Ricoux JP, Olshevski A, Patton S, Pec V, Peng JC, Piilonen LE, Pinsky L, Pun CS, Qi FZ, Qi M, Qian X, Raper N, Ren B, Ren J, Rosero R, Roskovec B, Ruan XC, Shao BB, Steiner H, Sun GX, Sun JL, Tam YH, Tang X, Themann H, Tsang KV, Tsang RH, Tull CE, Tung YC, Viren B, Vorobel V, Wang CH, Wang LS, Wang LY, Wang M, Wang NY, Wang RG, Wang W, Wang WW, Wang X, Wang YF, Wang Z, Wang Z, Wang ZM, Webber DM, Wei HY, Wei YD, Wen LJ, Whisnant K, White CG, Whitehead L, Wise T, Wong HL, Wong SC, Worcester E, Wu Q, Xia DM, Xia JK, Xia X, Xing ZZ, Xu JY, Xu JL, Xu J, Xu Y, Xue T, Yan J, Yang CC, Yang L, Yang MS, Yang MT, Ye M, Yeh M, Yeh YS, Young BL, Yu GY, Yu JY, Yu ZY, Zang SL, Zeng B, Zhan L, Zhang C, Zhang FH, Zhang JW, Zhang QM, Zhang Q, Zhang SH, Zhang YC, Zhang YM, Zhang YH, Zhang YX, Zhang ZJ, Zhang ZY, Zhang ZP, Zhao J, Zhao QW, Zhao Y, Zhao YB, Zheng L, Zhong WL, Zhou L, Zhou ZY, Zhuang HL, and Zou JH
Abstract: A search for light sterile neutrino mixing was performed with the first 217 days of data from the Daya Bay Reactor Antineutrino Experiment. The experiment's unique configuration of multiple baselines from six 2.9 GW(th) nuclear reactors to six antineutrino detectors deployed in two near (effective baselines 512 m and 561 m) and one far (1579 m) underground experimental halls makes it possible to test for oscillations to a fourth (sterile) neutrino in the 10(-3) eV(2)<|Δm(41)(2) |< 0.3 eV(2) range. The relative spectral distortion due to the disappearance of electron antineutrinos was found to be consistent with that of the three-flavor oscillation model. The derived limits on sin(2) 2θ(14) cover the 10(-3) eV(2) ≲ |Δm(41)(2)| ≲ 0.1 eV(2) region, which was largely unexplored.
Published: 2014
Full Text: View/download PDF

31. Spectral measurement of electron antineutrino oscillation amplitude and frequency at Daya Bay.

Author: An FP, Balantekin AB, Band HR, Beriguete W, Bishai M, Blyth S, Brown RL, Butorov I, Cao GF, Cao J, Carr R, Chan YL, Chang JF, Chang Y, Chasman C, Chen HS, Chen HY, Chen SJ, Chen SM, Chen XC, Chen XH, Chen Y, Chen YX, Cheng YP, Cherwinka JJ, Chu MC, Cummings JP, de Arcos J, Deng ZY, Ding YY, Diwan MV, Draeger E, Du XF, Dwyer DA, Edwards WR, Ely SR, Fu JY, Ge LQ, Gill R, Gonchar M, Gong GH, Gong H, Gornushkin YA, Gu WQ, Guan MY, Guo XH, Hackenburg RW, Hahn RL, Han GH, Hans S, He M, Heeger KM, Heng YK, Hinrichs P, Hor Y, Hsiung YB, Hu BZ, Hu LJ, Hu LM, Hu T, Hu W, Huang EC, Huang HX, Huang HZ, Huang XT, Huber P, Hussain G, Isvan Z, Jaffe DE, Jaffke P, Jetter S, Ji XL, Ji XP, Jiang HJ, Jiao JB, Johnson RA, Kang L, Kettell SH, Kramer M, Kwan KK, Kwok MW, Kwok T, Lai WC, Lai WH, Lau K, Lebanowski L, Lee J, Lei RT, Leitner R, Leung A, Leung JK, Lewis CA, Li DJ, Li F, Li GS, Li QJ, Li WD, Li XN, Li XQ, Li YF, Li ZB, Liang H, Lin CJ, Lin GL, Lin SK, Lin YC, Ling JJ, Link JM, Littenberg L, Littlejohn BR, Liu DW, Liu H, Liu JC, Liu JL, Liu SS, Liu YB, Lu C, Lu HQ, Luk KB, Ma QM, Ma XB, Ma XY, Ma YQ, McDonald KT, McFarlane MC, McKeown RD, Meng Y, Mitchell I, Nakajima Y, Napolitano J, Naumov D, Naumova E, Nemchenok I, Ngai HY, Ngai WK, Ning Z, Ochoa-Ricoux JP, Olshevski A, Patton S, Pec V, Peng JC, Piilonen LE, Pinsky L, Pun CS, Qi FZ, Qi M, Qian X, Raper N, Ren B, Ren J, Rosero R, Roskovec B, Ruan XC, Shao BB, Steiner H, Sun GX, Sun JL, Tam YH, Tanaka HK, Tang X, Themann H, Trentalange S, Tsai O, Tsang KV, Tsang RH, Tull CE, Tung YC, Viren B, Vorobel V, Wang CH, Wang LS, Wang LY, Wang LZ, Wang M, Wang NY, Wang RG, Wang W, Wang WW, Wang X, Wang YF, Wang Z, Wang Z, Wang ZM, Webber DM, Wei H, Wei YD, Wen LJ, Whisnant K, White CG, Whitehead L, Wise T, Wong HL, Wong SC, Worcester E, Wu Q, Xia DM, Xia JK, Xia X, Xing ZZ, Xu J, Xu JL, Xu JY, Xu Y, Xue T, Yan J, Yang CG, Yang L, Yang MS, Ye M, Yeh M, Yeh YS, Young BL, Yu GY, Yu JY, Yu ZY, Zang SL, Zhan L, Zhang C, Zhang FH, Zhang JW, Zhang QM, Zhang SH, Zhang YC, Zhang YH, Zhang YM, Zhang YX, Zhang ZJ, Zhang ZP, Zhang ZY, Zhao J, Zhao QW, Zhao YB, Zheng L, Zhong WL, Zhou L, Zhou ZY, Zhuang HL, and Zou JH
Abstract: A measurement of the energy dependence of antineutrino disappearance at the Daya Bay reactor neutrino experiment is reported. Electron antineutrinos (ν¯(e)) from six 2.9 GW(th) reactors were detected with six detectors deployed in two near (effective baselines 512 and 561 m) and one far (1579 m) underground experimental halls. Using 217 days of data, 41 589 (203 809 and 92 912) antineutrino candidates were detected in the far hall (near halls). An improved measurement of the oscillation amplitude sin(2)2θ(13)=0.090(-0.009)(+0.008) and the first direct measurement of the ν¯(e) mass-squared difference |Δm(ee)2|=(2.59(-0.20)(+0.19))×10(-3) eV2 is obtained using the observed ν¯(e) rates and energy spectra in a three-neutrino framework. This value of |Δm(ee)2| is consistent with |Δm(μμ)2| measured by muon neutrino disappearance, supporting the three-flavor oscillation model.
Published: 2014
Full Text: View/download PDF

32. Interactions of relativistic neon to nickel projectiles in hydrogen, elemental production cross sections.

Author: Knott CN, Albergo S, Caccia Z, Chen C, Costa S, Crawford HJ, Cronqvist M, Engelage J, Ferrando P, Fonte R, Greiner L, Guzik TG, Insolia A, Jones FC, Lindstrom PJ, Mitchell JW, Potenza R, Romanski J, Russo GV, Soutoul A, Testard O, Tull CE, Tuvé C, Waddington CJ, Webber WR, and Wefel JP
Published: 1996
Full Text: View/download PDF

33. A program to measure new energetic particle nuclear interaction cross sections.

Author: Guzik TG, Albergo S, Chen CX, Costa S, Crawford HJ, Engelage J, Ferrando P, Flores I, Greiner L, Jones FC, Knott CN, Ko S, Lindstrom PJ, Mazotta J, Mitchell JW, Romanski J, Potenza R, Soutoul A, Testard O, Tull CE, Tuve C, Waddington CJ, Webber WR, Wefel JP, and Zhang X
Subjects: France, Germany, International Cooperation, Italy, Mass Spectrometry, Radiation, Ionizing, United States, Cosmic Radiation, Databases, Factual, Nuclear Physics, Particle Accelerators
Abstract: The Transport Collaboration, consisting of researchers from institutions in France, Germany, Italy and the USA, has established a program to make new measurements of nuclear interaction cross sections for heavy projectiles (Z > or = 2) in targets of liquid H2, He and heavier materials. Such cross sections directly affect calculations of galactic and solar cosmic ray transport through matter and are needed for accurate radiation hazard assessment. To date, the collaboration has obtained data using the LBL Bevalac HISS facility with 20 projectiles from 4He to 58Ni in the energy range 393-910 MeV/nucleon. Preliminary results from the analysis of these data are presented here and compared to other measurements and to cross section prediction formulae.
Published: 1994
Full Text: View/download PDF

34. Fragment mass dependence of pT at GeV per nucleon energies.

Author: Brady FP, Christie WB, Romero JL, Tull CE, Chance JL, Grim GP, Young JC, Crawford HJ, Kobayashi T, Lindstrom PJ, Olson DL, Symons TJ, Tanihata I I, Wieman H, Müller WF, Sann H, and Lynen U
Published: 1994
Full Text: View/download PDF

35. Interactions in hydrogen of relativistic neon to nickel projectiles: Total charge-changing cross sections.

Author: Chen C, Albergo S, Caccia Z, Costa S, Crawford HJ, Cronqvist M, Engelage J, Ferrando P, Fonte R, Greiner L, Guzik TG, Insolia A, Jones FC, Knott CN, Lindstrom PJ, Mitchell JW, Potenza R, Romanski J, Russo GV, Soutoul A, Testard O, Tull CE, Tuvé C, Waddington CJ, Webber WR, Wefel JP, and Zhang X
Published: 1994
Full Text: View/download PDF

36. Fragmentation of 1.2 GeV per nucleon 139La.

Author: Christie WB, Romero JL, Brady FP, Tull CE, Grim GP, McEachern B, Young JC, Crawford HJ, Greiner DE, Lindstrom PJ, Sann H, and Lynen U
Published: 1993
Full Text: View/download PDF

37. Pion correlations for 1.2A GeV lanthanum on lanthanum.

Author: Christie WB, Olson DL, Tull CE, Brady FP, Grim GP, Osborne JH, Partlan ML, Romero JL, Chang J, Fung SY, Kang J, Zhang S, Keane D, Beavis D, and Dardenne Y
Published: 1993
Full Text: View/download PDF

38. Pion correlations in 1.8A GeV Ar on KCl and La and 1.2A GeV Xe on La.

Author: Christie WB, Mueller WF, Olson DL, Symons TJ, Wieman HH, Beavis D, Brady FP, Romero JL, Tull CE, Abbott T, Fung SY, Keane D, and Liu Y
Published: 1992
Full Text: View/download PDF

39. Large pT from the fragmentation of 1.2-GeV/nucleon 139La nuclei.

Author: Brady FP, Christie WB, Romero JL, Tull CE, McEachern B, Webb ML, Young JC, Crawford HJ, Greiner DE, Lindstrom PJ, and Sann H
Published: 1988
Full Text: View/download PDF

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Publication Type

Journal

Region

Database

Publisher

39 results on '"Tull, CE"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources