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.

该研究计划由NSF奖支持将集中在质子和中子的内部结构的研究，或更一般地说，核子。这些基本粒子是我们周围所有可见物质的基石，构成了原子核。虽然众所周知，质子和中子是由非常轻的夸克组成的，它们被非常强的色力保持在束缚态，但关于这种束缚态的详细结构的信息仍然很少。特别是，我们对夸克动量在我们所处的三维空间中的分布知之甚少。我们目前的知识本质上仅限于一维，类似于一个人的影子轮廓图片。 该小组将在杰斐逊实验室领导两项实验，其中高能电子或光子束从氢和氘靶散射。 在一个实验中，光子将与原子核内的夸克相互作用，并产生一个夸克相对位置及其动量的地图。 另一个实验将绘制出在很宽的角度和能量范围内的散射图，这些散射图会产生核子的轮廓状图像。 除了科学目标之外，拟议的实验设置，数据采集和分析活动将继续为本科生，研究生和博士后研究人员提供教育和研究经验。在国际合作的环境中工作，以一流的加速器设施为基础，将拓宽小组成员的视角和兴趣，并有助于培养该国未来的STEM人才。这个为期三年的研究计划将通过检查夸克被高能光子从核子中射出时产生的亚原子粒子的动量来研究夸克的三维动量分布，由托马斯杰斐逊国家加速器设施的高强度加速器产生。核物理界将首次使用具有不同偏振的光子来研究这种夸克弹射过程，从而研究与夸克自旋1/2相关的效应。 利用半包容深度非弹性散射（SIDIS）测量单自旋非对称性，研究核子的横向动量相关部分子分布（TMD）和碎裂函数。SIDIS测量正在成为杰斐逊实验室12 GeV CEBAF的旗舰项目，也是布鲁克黑文国家实验室新宣布的电子离子对撞机将在未来十年内建造的项目。研究活动将围绕使用SIDIS的JLab实验来测量氢和氘靶的带电π介子和K介子的横截面。 这项工作的部分动机是作为一个测试的因子分解框架用于SIDIS过程中的TMD提取从这样的测量是基于。另一个实验集中于从氢和氘靶进行SIDIS带电π介子产生的L-T分离，以测试来自SIDIS的R是否与来自包括DIS的R相同，其中R是纵向到横向横截面。预计的测量将显着改善先前实验中现有的稀缺数据，并提高我们对潜在生产机制的了解。该奖项反映了NSF的法定使命，并且通过使用基金会的知识价值和更广泛的影响进行评估，被认为值得支持审查标准。

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.

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

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.

Ruling out Color Transparency in Quasielastic 12C(e,e'p) up to Q2 of 14.2 (GeV/c)2

排除准弹性 12C(e,ep) 中 Q2 高达 14.2 (GeV/c)2 的颜色透明度

• 发表时间: 2021
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: Bhetuwal, D;Matter, J;Szumila-Vance, H;Kabir, M. L;Dutta, D;Ent, R;Abrams, D;Ahmed, Z;Aljawrneh, B;Alsalmi, S
• 通讯作者: Alsalmi, S