Studies of Quark-Gluon Physics

夸克-胶子物理研究

• 批准号: 2013002
• 负责人: Edward Kinney
• 金额: $ 42万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2013002&HistoricalAwards=false
• 关键词: Studies; Quark; Gluon; Physics

The research program supported by this NSF award will focus on the study of the inner structure of the proton and neutron, or more generically, the nucleon. These basic particles are the building blocks for all the visible matter around us, making up the atomic nucleus. While it is well known that the proton and neutron are composed of very light quarks held in a bound state by the very strong color force, there is still little information available about the detailed structure of this bound state. In particular, we know very little of the distribution of the quark momentum in the three space dimensions we live in. Our present knowledge is essentially limited to one dimension, similar to a shadow profile picture of a person. This group will lead two experiments at Jefferson Laboratory in which beams of high energy electrons or photons are scattered from hydrogen and deuterium targets. In one experiment photons will interact with the quarks inside the nucleus and produce a map of where the quarks are relative to each other and their momentum. The other experiment will map out the scattering over a wide range of angles and energies that produce silhouette-like images of the nucleon. Beyond the scientific goals, the proposed experiment setup, data acquisition and analysis activities will continue to offer education and research experience to undergraduates, graduate students, and postdoctoral research associates. Working in the environment of an international collaboration based at a premier accelerator facility will broaden the perspective and interests of the group members and help to train the future STEM workforce of the country.This three-year research program will study the 3D momentum distribution of the quarks by examining the momentum of the sub-atomic particles they produce when ejected from the nucleon by a high-energy a photon, produced by the high intensity accelerator at the Thomas Jefferson National Accelerator Facility. For the first time, the nuclear physics community will study this quark ejection process using photons with distinct polarization, allowing for the study of effects related to the quark spin of ½. Single spin asymmetry measurements from semi-inclusive deep-inelastic-scattering (SIDIS) will be used to study the transverse momentum dependent parton distribution (TMD) and fragmentation functions of the nucleon. SIDIS measurements are becoming a flagship program both at the 12-GeV CEBAF at Jefferson Lab, and also the newly announced electron-ion-collider to be built at Brook Haven National Lab in the coming decade. The research activities will center around JLab experiments using SIDIS to measure the cross section of charged pions and kaons from hydrogen and deuterium targets. This work is partially motivated as a test of the factorization framework used for SIDIS processes where the TMD extraction from such measurements is based upon. Another experiment focuses on performing L-T separations of SIDIS charged pion production from hydrogen and deuterium targets to test whether R from SIDIS is the same as R from inclusive DIS, where R is the longitudinal to transverse cross section. The projected measurements will significantly improve the existing scarce data from prior experiments and advance our knowledge about the underlying production mechanism.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.

NSF奖支持的研究计划将重点放在质子和中子的内部结构或更一般的核子的内部结构上。这些基本颗粒是我们周围所有可见物质的基础，构成了原子核us。众所周知，质子和中子是由非常强的夸克由非常强的颜色力固定在界面状态下的非常轻的夸克组成，但仍然几乎没有关于该结合状态的详细结构的信息。特别是，我们对我们所居住的三个空间维度的夸克动量的分布很少知道。我们当前的知识本质上仅限于一个维度，类似于一个人的阴影概况图片。该组将在杰斐逊实验室进行两个实验，其中高能电子或照片的光束散布在氢和氘目标中。在一个实验中，照片将与细胞核内的夸克相互作用，并产生夸克相对于彼此及其动量的地图。另一个实验将在产生类似轮廓的核图像的各个角度和能量上绘制散射。除了科学目标之外，拟议的实验设置，数据获取和分析活动将继续为大学生，研究生和博士后研究伙伴提供教育和研究经验。在国际合作的环境中，基于高级加速器设施的国际合作环境将扩大小组成员的观点和利益，并有助于训练该国的未来STEM劳动力。这些三年的研究计划将研究夸克的3D动量分布，通过研究Qualter a Grout a Groder of Pofter a Groder a Groder a Grote the Indery a Groder a Grote the Indery high-aighers of aighery high-aighers of aighery high-aighens of aighery high of aighery的动量的分布，这将是研究的。杰斐逊国家加速器设施。核物理学界首次使用具有明显极化的照片研究了这一夸克弹射过程，从而可以研究与½的夸克旋转相关的效果。半自旋不对称测量结果将使用半封闭式深层散射（SIDIS）来研究核的横向动量依赖的parton分布（TMD）和核的片段化功能。 SIDIS的测量值在杰斐逊实验室的12-GEV CEBAF上成为旗舰计划，也是未来十年在Brook Haven National Lab建造的新宣布的Electron-Ion Collider。研究活动将围绕使用SIDIS进行JLAB实验，以测量来自氢和氘靶的带电亲和Kaons的横截面。这项工作是部分动机，作为对SIDIS过程的分解框架的测试，其中从此类测量中提取TMD。另一个实验的重点是对SIDIS带电的L-T分离从氢和氘靶标的L-T分离，以测试来自SIDIS的R是否与来自包含性DIS的R相同，其中R是纵向到横截面。预计的测量结果将显着改善先前实验中现有的稀缺数据，并提高我们对基本生产机制的了解。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子和更广泛的影响审查标准来通过评估来诚实地获得支持。

项目成果

Constraints on the onset of color transparency from quasielastic C12(e,e′p) up to Q2=14.2(GeV/c)2

从准弹性 C12(e,e−p) 到 Q2=14.2(GeV/c)2 颜色透明度开始的限制

• DOI: 10.1103/physrevc.108.025203
• 发表时间: 2023
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Bhetuwal, D.;Matter, J.;Szumila-Vance, H.;Gayoso, C. Ayerbe;Kabir, M. L.;Dutta, D.;Ent, R.;Abrams, D.;Ahmed, Z.;Aljawrneh, B.
• 通讯作者: Aljawrneh, B.

Publisher Correction: The asymmetry of antimatter in the proton

出版商更正：质子中反物质的不对称性

• DOI: 10.1038/s41586-022-04707-z
• 发表时间: 2022
• 期刊: Nature
• 影响因子: 64.8
• 作者: Dove, J.;Kerns, B.;McClellan, R. E.;Miyasaka, S.;Morton, D. H.;Nagai, K.;Prasad, S.;Sanftl, F.;Scott, M. B.;Tadepalli, A. S.
• 通讯作者: Tadepalli, A. S.

Probing the Deuteron at Very Large Internal Momenta

探测氘核的巨大内动量

• DOI: 10.1103/physrevlett.125.262501
• 发表时间: 2020
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Yero, C.;Abrams, D.;Ahmed, Z.;Ahmidouch, A.;Aljawrneh, B.;Alsalmi, S.;Ambrose, R.;Armstrong, W.;Asaturyan, A.;Assumin-Gyimah, K.
• 通讯作者: Assumin-Gyimah, K.

An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab

• DOI: 10.1140/epja/s10050-021-00564-y
• 发表时间: 2020-07
• 期刊: The European Physical Journal A
• 作者: A. Accardi;A. Afanasev;I. Albayrak;S. Ali;M. Amaryan;J. Annand;J. Arrington;A. Asaturyan;H. Atac;H. Avakian;T. Averett;C. Gayoso;X. Bai;L. Barion;M. Battaglieri;V. Bellini;R. Beminiwattha;F. Benmokhtar;V. Berdnikov;J. Bernauer;V. Bertone;A. Bianconi;A. Biselli;P. Bisio;P. Blunden;M. Boer;M. Bondí;K. Brinkmann;W. Briscoe;V. Burkert;T. Cao;A. Camsonne;R. Capobianco;L. Cardman;M. Carmignotto;M. Caudron;L. Causse;A. Celentano;P. Chatagnon;J. Chen;T. Chetry;G. Ciullo;E. Cline;P. Cole;M. Contalbrigo;G. Costantini;A. D’Angelo;L. Darm'e;D. Day;M. Defurne;M. Napoli;A. Deur;R. Vita;N. d'Hose;S. Diehl;M. Diefenthaler;B. Dongwi;R. Dupr'e;H. Dutrieux;D. Dutta;M. Ehrhart;Lamiaa El Fassi;L. Elouadrhiri;R. Ent;J. Erler;I. Fernando;A. Filippi;D. Flay;T. Forest;E. Fuchey;S. Fucini;Y. Furletova;H. Gao;D. Gaskell;A. Gasparian;T. Gautam;F. Girod;K. Gnanvo;J. Grames;G. N. Grauvoge;P. Guèye;M. Guidal;S. Habet;T. Hague;David Hamilton;O. Hansen;D. Hasell;M. Hattawy;D. Higinbotham;A. Hobart;T. Horn;C. Hyde;H. Ibrahim;A. Ilyichev;A. Italiano;K. Joo;S. Joosten;V. Khachatryan;N. Kalantarians;G. Kalicy;B. Karky;D. Keller;C. Keppel;M. Kerver;M. Khandaker;A. Kim;J. Kim;P. King;E. Kinney;V. Klimenko;H. Ko;M. Kohl;V. Kozhuharov;B. Kriesten;G. Krnjaic;V. Kubarovsky;T. Kutz;L. Lanza;M. Leali;P. Lenisa;N. Liyanage;Q. Liu;S. Liuti;J. Mammei;S. Mantry;D. Marchand;P. Markowitz;L. Marsicano;V. Mascagna;Malek Mazouz;M. McCaughan;B. Mckinnon;D. Mcnulty;W. Melnitchouk;A. Metz;Z. Meziani;S. Migliorati;M. Mihovilovič;R. Milner;A. Mkrtchyan;H. Mkrtchyan;A. Movsisyan;H. Moutarde;M. Muhoza;C. Camacho;J. Murphy;P. Nadel-Turonski;E. Nardi;J. Nazeer;S. Niccolai;G. Niculescu;R. Novotný;J. Owens;M. Paolone;L. Pappalardo;R. Paremuzyan;B. Pasquini;E. Pasyuk;T. Patel;I. Pegg;C. Peng;D. Perera;M. Poelker;K. Price;A. Puckett;M. Raggi;N. Randazzo;M. Rashad;M. Rathnayake;B. Raue;P. Reimer;M. Rinaldi;Alessandro Rizzo;Y. Roblin;J. Roche;O. Rondon-Aramayo;F. Sabati'e;G. Salmè;E. Santopinto;R. Estrada;B. Sawatzky;A. Schmidt;P. Schweitzer;S. Scopetta;V. Sergeyeva;M. Shabestari;A. Shahinyan;Y. Sharabian;S. vSirca;E. Smith;D. Sokhan;A. Somov;N. Sparveris;M. Spata;H. Spiesberger;M. Spreafico;S. Stepanyan;P. Stoler;I. Strakovsky;R. Suleiman;M. Suresh;P. Sznajder;H. Szumila-Vance;V. Tadevosyan;A. Tadepalli;A. Thomas;M. Tiefenback;R. Trotta;M. Ungaro;P. Valente;M. Vanderhaeghen;L. Venturelli;H. Voskanyan;E. Voutier;B. Wojtsekhowski;M. Wood;S. Wood;J. Xie;W. Xiong;Z. Ye;M. Yurov;H. Zaunick;S. Zhamkochyan;J. Zhang;S. Zhang;S. Zhao;Z. Zhao;X. Zheng;J. Zhou;C. Zorn

Deeply virtual Compton scattering using a positron beam in Hall-C at Jefferson Lab

• DOI: 10.1140/epja/s10050-021-00581-x
• 发表时间: 2021-05
• 期刊: The European Physical Journal A
• 作者: A. Afanasev;I. Albayrak;S. Ali;M. Amaryan;J. Annand;A. Asaturyan;V. Bellini;V. Berdnikov;M. Boer;K. Brinkmann;W. Briscoe;A. Camsonne;M. Caudron;L. Causse;M. Carmignotto;D. Day;M. Defurne;S. Diehln;R. Ent;P. Chatagnon;R. Dupr'e;D. Dutta;M. Ehrhart;M. A. I. Fernando;T. Forest;M. Guidal;J. Grames;P. Guèye;S. Habet;David Hamilton;A. Hobart;T. Horn;C. Hyde;G. Kalicy;D. Keller;C. Keppel;M. Kerver;E. Kinney;H. Ko;D. Marchand;P. Markowitze;Malek Mazouz;M. McCaughan;B. Mckinnon;A. Mkrtchyan;H. Mkrtchyan;M. Muhoza;C. Camacho;J. Murphy;P. Nadel-Turonski;S. Niccolai;G. Niculescu;R. Novotný;R. Paremuzyan;I. Pegg;K. Price;H. Rashad;J. Roche;R. Rondón;B. Sawatzky;V. Sergeyeva;S. vSirca;A. Somov;I. Strakovsky;V. Tadevosyan;R. Trotta;H. Voskanyan;E. Voutier;B. Wojtsekhowski;S. Wood;S. Zhamkochyan;J. Zhang;S. Zhao;C. Zorn