Research and Education with GlueX

使用 GlueX 进行研究和教育

• 批准号: 1812415
• 负责人: Richard Jones
• 金额: $ 36.3万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1812415&HistoricalAwards=false
• 关键词: Research; Education; GlueX

The GlueX experiment at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) searches for evidence of a new class of particles called hybrid mesons, which are expected to exist based on the Standard Model of particle physics. The best existing theory calculations for hybrid mesons predicts that 27 such mesons should exist within the mass between 1.8 and 2.5 GeV/c. GlueX has been built to study this full mass region with excellent sensitivity, using a high-intensity polarized photon beam and a state-of-the-art detector capable of identifying these new particles from the momentum distributions of their decay products. The GlueX group at University of Connecticut consists of the PI, one PhD student, and two undergraduate student researchers. This team is responsible for producing the diamond targets that generate the polarized high-energy photon beam from electrons accelerated in the Jefferson Lab accelerator, making sure they meet the stringent requirements in terms of crystal quality and flatness. The group also constructed and maintains the tagging "microscope" detector that is used to measure the photon beam energy. Support received under this grant enables the UConn team to travel to Newport News to support the operation of the GlueX experiment over the next three years, and to work on the analysis of GlueX data.Experimental searches for hybrid mesons over the past 20 years have mostly come up empty, except for one or two outstanding candidates. One plausible reason for this is that prior searches have focused on the wrong mass region, guided by older model calculations which indicated that the masses of the lightest hybrids might be less than 1.5 GeV. Within the past decade, improved predictions have emerged, pointing to a higher mass region 1.8 - 2.5 GeV for the lightest 3 hybrid nonets. GlueX has been built to study this full mass region, with excellent mass resolution and high statistics, in photo production by polarized 9 GeV photons. During the past three years, GlueX has completed commissioning and initial physics data-taking phases. Over the next three years, the experiment will collect a major part of the full dataset required to complete its primary physics mission, and will complete an initial survey of the resonance landscape over the mass range of interest, focusing initially on a small number of exclusive final states that are favored for hybrid decays. The UConn group supports the analysis effort by authoring and maintaining the physics simulation package for GlueX, managing shared computer resources for physics simulation, and participating in the shared data analysis effort.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在托马斯杰斐逊国家加速器设施（杰斐逊实验室）的GSTX实验寻找一种称为混合介子的新粒子的证据，这种粒子预计将存在于粒子物理学的标准模型中。现有的最好的理论计算预测，在1.8和2.5 GeV/c之间的质量范围内，应该存在27个这样的介子。已经建立了GSTX来研究这个具有出色灵敏度的完整质量区域，使用高强度偏振光子束和最先进的探测器，能够从衰变产物的动量分布中识别这些新粒子。康涅狄格大学的GSTX小组由PI，一名博士生和两名本科生研究人员组成。该团队负责生产金刚石靶，该靶从杰斐逊实验室加速器中加速的电子产生偏振高能光子束，确保它们符合晶体质量和平整度方面的严格要求。该小组还建造和维护了用于测量光子束能量的标记“显微镜”探测器。在这笔资助下获得的支持使康州大学的团队能够前往纽波特纽斯，在未来三年内支持GSTX实验的运行，并对GSTX数据进行分析。在过去的20年里，除了一两个优秀的候选者外，对混合介子的实验搜索大多是空的。一个合理的原因是，先前的搜索集中在错误的质量区域，由旧的模型计算指导，该模型计算表明最轻的混合体的质量可能小于1.5 GeV。在过去的十年中，改进的预测已经出现，指出最轻的3个混合九星的质量更高，为1.8 - 2.5 GeV。已经建立了GSTX来研究这个完整的质量区域，具有出色的质量分辨率和高统计数据，通过偏振的9 GeV光子进行照片制作。在过去的三年中，GEOX已经完成了调试和初始物理数据采集阶段。在接下来的三年里，该实验将收集完成其主要物理使命所需的完整数据集的主要部分，并将完成对感兴趣的质量范围内的共振景观的初步调查，最初专注于少数有利于混合衰变的排他性最终状态。康州大学的研究小组通过编写和维护GSTX的物理模拟软件包，管理物理模拟的共享计算机资源，以及参与共享数据分析工作来支持分析工作。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Measurement of beam asymmetry for π−Δ++ photoproduction on the proton at Eγ=8.5GeV

Eγ=8.5GeV 质子光生产中光束不对称性的测量

• DOI: 10.1103/physrevc.103.l022201
• 发表时间: 2021
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Adhikari, S.;Akondi, C. S.;Ali, A.;Amaryan, M.;Asaturyan, A.;Austregesilo, A.;Baldwin, Z.;Barbosa, F.;Barlow, J.;Barriga, E.
• 通讯作者: Barriga, E.

Parity-violating inelastic electron-proton scattering at low Q2 above the resonance region

谐振区上方低 Q2 处的宇称破坏非弹性电子-质子散射

• DOI: 10.1103/physrevc.101.055503
• 发表时间: 2020
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Androić, D.;Armstrong, D. S.;Asaturyan, A.;Bartlett, K.;Beminiwattha, R. S.;Benesch, J.;Benmokhtar, F.;Birchall, J.;Carlini, R. D.;Cornejo, J. C.
• 通讯作者: Cornejo, J. C.

The GlueX beamline and detector

• DOI: 10.1016/j.nima.2020.164807
• 发表时间: 2020-05
• 期刊: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 作者: S. Adhikari;A. Ali;M. Amaryan;E. Anassontzis;A. Austregesilo;F. Barbosa;J. Barlow;A. Barnes;E. Barriga;R. Barsotti;T. Beattie;J. Benesch;V. Berdnikov;G. Biallas;T. Black;W. Boeglin;P. Brindza;W. Briscoe;T. Britton;J. Brock;W. Brooks;B. Cannon;C. Carlin;D. Carman;T. Carstens;N. Cao;O. Chernyshov;E. Chudakov;S. Cole;O. Cortes;W. Crahen;V. Crede;M. Dalton;T. Daniels;A. Deur;C. Dickover;S. Dobbs;A. Dolgolenko;R. Dotel;M. Dugger;R. Dzhygadlo;A. Dzierba;H. Egiyan;T. Erbora;A. Ernst;P. Eugenio;C. Fanelli;S. Fegan;A. Foda;J. Foote;J. Frye;S. Furletov;L. Gan;A. Gasparian;A. Gerasimov;N. Gevorgyan;C. Gleason;K. Goetzen;A. Goryachev;L. Guo;H. Hakobyan;A. Hamdi;J. Hardin;C. Henschel;G. Huber;C. Hutton;A. Hurley;P. Ioannou;D. Ireland;M. Ito;N. Jarvis;R. Jones;V. Kakoyan;S. Katsaganis;G. Kalicy;M. Kamel;C. Keith;F. Klein;R. Kliemt;D. Kolybaba;C. Kourkoumelis;S. Krueger;S. Kuleshov;I. Larin;D. Lawrence;J. Leckey;D. Lersch;B. Leverington;W. Levine;W. Li;B. Liu;K. Livingston;G. Lolos;V. Lyubovitskij;D. Mack;H. Marukyan;P. Mattione;V. Matveev;M. McCaughan;M. McCracken;W. Mcginley;J. McIntyre;D. Meekins;R. Mendez;C. Meyer;R. Miskimen;R. Mitchell;F. Mokaya;K. Moriya;F. Nerling;L. Ng;H. Ni;A. Ostrovidov;Z. Papandreou;M. Patsyuk;C. Paudel;P. Pauli;R. Pedroni;L. Pentchev;K. Peters;W. Phelps;J. Pierce;E. Pooser;V. Popov;B. Pratt;Y. Qiang;N. Qin;V. Razmyslovich;J. Reinhold;B. Ritchie;J. Ritman;L. Robison;D. Romanov;C. Romero;C. Salgado;N. Sandoval;T. Satogata;A. Schertz;S. Schadmand;A. Schick;R. Schumacher;C. Schwarz;J. Schwiening;A. Semenov;I. Semenova;K. Seth;X. Shen;M. Shepherd;E. Smith;D. Sober;A. Somov;S. Somov;O. Soto;N. Sparks;M. Staib;C. Stanislav;J. Stevens;J. Stewart;I. Strakovsky;B.C.L. Summner;K. Suresh;V. Tarasov;S. Taylor;L. A. Teigrob;A. Teymurazyan;A. Thiel;I. Tolstukhin;A. Tomaradze;A. Toro;A. Tsaris;Y. Haarlem;G. Vasileiadis;I. Vega;G. Visser;G. Voulgaris;N. Walford;D. Werthmüller;T. Whitlatch;N. Wickramaarachchi;M. Williams;E. Wolin;T. Xiao;Y. Yang;J. Zarling;Z. Zhang;Q. Zhou;X. Zhou;B. Zihlmann

Search for photoproduction of axionlike particles at GlueX

• DOI: 10.1103/physrevd.105.052007
• 发表时间: 2021-09
• 期刊: Physical Review D
• 影响因子: 5
• 作者: S. Adhikari;C. Akondi;M. Albrecht;A. Ali;M. Amaryan;A. Asaturyan;A. Austregesilo;Z. Baldwin;F. Barbosa;J. Barlow;E. Barriga;R. Barsotti;T. Beattie;V. Berdnikov;T. Black;W. Boeglin;W. Briscoe;T. Britton;W. Brooks;E. Chudakov;S. Cole;P. Cole;O. Cortes;V. Crede;M. Dalton;A. Deur;S. Dobbs;A. Dolgolenko;R. Dotel;M. Dugger;R. Dzhygadlo;D. Ebersole;H. Egiyan;T. Erbora;A. Ernst;P. Eugenio;C. Fanelli;S. Fegan;J. Fitches;A. Foda;S. Furletov;L. Gan;H. Gao;A. Gasparian;C. Gleason;K. Goetzen;V. Goryachev;L. Guo;M. Hagen;H. Hakobyan;A. Hamdi;J. Hernandez;N. Hoffman;G. Hou;G. Huber;A. Hurley;D. Ireland;M. Ito;I. Jaegle;N. Jarvis;R. T. Jones-R. T.-Jones-2213399303;V. Kakoyan;G. Kalicy;M. Kamel;V. Khachatryan;M. Khatchatryan;C. Kourkoumelis;S. Kuleshov;A. LaDuke;I. Larin;D. Lawrence;D. Lersch;H. Li;W. B. Li-W. B.-Li-2124567731;Bo Liu;K. Livingston;G. Lolos;L. Lorenti;K. Luckas;V. Lyubovitskij;D. Mack;A. Mahmood;H. Marukyan;V. Matveev;M. McCaughan;M. McCracken;C. Meyer;R. Miskimen;R. Mitchell;K. Mizutani;V. Neelamana;F. Nerling;L. Ng;A. Ostrovidov;Z. Papandreou;C. Paudel;P. Pauli;R. Pedroni;L. Pentchev;K. Peters;J. Reinhold;B. Ritchie;J. Ritman;G. Rodriguez;D. Romanov;C. Romero;K. Saldaña;C. Salgado;S. Schadmand;A. Schertz;A. Schick;A. Schmidt;R. Schumacher;J. Schwiening;P. Sharp;X. Shen;M. Shepherd;A. Smith;E. Smith;D. Sober;A. Somov;S. Somov;O. Soto;J. Stevens;I. Strakovsky;B. Sumner;K. Suresh;V. Tarasov;S. Taylor;A. Teymurazyan;A. Thiel;G. Vasileiadis;T. Viducic;T. Whitlatch;N. Wickramaarachchi;M. Williams;Y. Yang;S. Yoon;J. Zarling;Z. Zhang;Z. Zhao;J. Zhou;X. Zhou;B. Zihlmann

Measurement of spin density matrix elements in Λ(1520) photoproduction at 8.2–8.8 GeV

8.2–8.8 GeV Î(1520) 光制作中自旋密度矩阵元素的测量

• DOI: 10.1103/physrevc.105.035201
• 发表时间: 2022
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Adhikari, S.;Akondi, C. S.;Albrecht, M.;Ali, A.;Amaryan, M.;Asaturyan, A.;Austregesilo, A.;Baldwin, Z.;Barbosa, F.;Barlow, J.
• 通讯作者: Barlow, J.