Higher-Order QED for Precision Electromagnetic Probes of Hadronic Structure

用于强子结构精密电磁探针的高阶量子电动力学

• 批准号: 1812343
• 负责人: Andrei Afanasev
• 金额: $ 27万
• 依托单位: George Washington University
• 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: 2018-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1812343&HistoricalAwards=false
• 关键词: Higher; Order; QED; Precision; Electromagnetic

Crucial information about the properties of atomic nuclei, the main building blocks of matter, is obtained from scattering of electron beams accelerated to energies of billions of electron-volts. Electron accelerators such as the Continuous Electron Beam Accelerator Facility (CEBAF) at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) are capable of recreating three-dimensional images of not only an atomic nucleus, but also of its elementary constituents - quarks - and their interactions. Such high resolution imaging is needed to obtain key information about the still undiscovered physics guiding formation of nuclear structure. However, the high resolution of electron probes can be obscured by the fact that electromagnetic effects described by quantum electrodynamics (QED) are only about a factor of a hundred times weaker than the strong interactions within atomic nuclei. In this context, this project will make possible precision corrections for electromagnetic effects into a self-consistent analysis of electron scattering by nucleons and nuclei. In addition, the PI will mentor students engaged in this state-of-the-art scientific research in nuclear theory. This projects will allow the development of the theoretical framework needed to include higher-order electromagnetic effects into analysis of key physics processes of charged lepton scattering to be studied experimentally at Jefferson Lab and a future Electron-Ion Collider. The effects of higher-order QED corrections for electron-proton and electron-nucleus scattering will be examined in detail. In particular, the PI and his collaborators will analyze multi-photon and radiation corrections for elastic and inelastic electron scattering on a nucleon and nuclei. Particular nuclear reactions and effects to be considered are: (a) Deep exclusive processes on a nucleon: Effects due to two-photon exchange. (b) QED loop effects for T-odd asymmetries of semi-inclusive deep-inelastic electron-nucleon scattering (SIDIS). (c) Coulomb effects in single-spin asymmetries of electron scattering from nuclei. (d) Lepton mass effects for two-photon corrections in elastic scattering of electrons and muons on a proton. The PI will develop a user-friendly web interface that will allow researchers in this field to run calculations that will improve the accuracy of electron (and muon) scattering studies.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.

关于物质的主要构建基块原子核的性质的关键信息是从加速到数十亿电子伏特的能量的电子束的散射中获得的。托马斯·杰斐逊国家加速器设施（Jefferson Lab）等电子加速器（例如连续电子束加速器设施（CEBAF））能够重现不仅原子核的三维图像，而且还能够重现其基本组成部分的三维图像 - Quarks- Quark及其相互作用。需要这样的高分辨率成像以获取有关核结构仍未发现的物理形成的关键信息。然而，通过量子电动力学（QED）描述的电磁效应仅比原子核内的强相互作用弱约一百倍，因此可以掩盖电子探针的高分辨率。在这种情况下，该项目将使电磁效应的精确校正成为对核和核对电子散射的自洽分析的可能性。此外，PI将指导从事核理论科学研究的学生。该项目将允许在杰斐逊实验室（Jefferson Lab）和未来的电子离子碰撞者的实验研究中，将更高阶段的电磁效应包括在分析带电的Lepton散射的关键物理过程中所需的理论框架。将详细检查高阶Q校正对电子蛋白和电子核散射的影响。特别是，PI和他的合作者将分析核子和核上弹性和非弹性电子散射的多光子和辐射校正。要考虑的特定核反应和效果是：（a）对核子的深度独家过程：由于两光子交换而产生的影响。 （b）半包含深度弹性电子核子散射（SIDIS）的T-ODD不对称的QED环效应。 （c）来自核电子散射的单旋抗体不对称的库仑效应。 （d）在质子上电子和muons弹性散射中的两光子校正的Lepton质量效应。 PI将开发一个用户友好的Web界面，该界面将使该领域的研究人员能够运行计算，以提高电子（和MUON）散射研究的准确性。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的审查标准来通过评估来通过评估来支持的。

项目成果

Radiative corrections to the lepton current in unpolarized elastic lp-interaction for fixed $$Q^2$$ and scattering angle

对固定 $$Q^2$$ 和散射角的非极化弹性 lp 相互作用中轻子电流的辐射校正

• DOI: 10.1140/epja/s10050-021-00582-w
• 发表时间: 2021
• 期刊: The European Physical Journal A
• 作者: Afanasev, A.;Ilyichev, A.
• 通讯作者: Ilyichev, A.

Lepton mass effects for beam-normal single-spin asymmetry in elastic muon-proton scattering

• DOI: 10.1103/physrevd.100.096020
• 发表时间: 2019-05
• 期刊: Physical Review D
• 影响因子: 5
• 作者: O. Koshchii;A. Afanasev

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

Beam charge asymmetries for deeply virtual Compton scattering off the proton

• DOI: 10.1140/epja/s10050-021-00474-z
• 发表时间: 2021-03
• 期刊: The European Physical Journal A
• 作者: V. Burkert;L. Elouadrhiri;F. Girod;S. Niccolai;E.Voutier;A. Afanasev;L. Barion;M. Battaglieri;J. Bernauer;A. Bianconi;R. Capobianco;M. Caudron;L. Causse;P.Chatagnon;T.Chetry;G.Ciullo;P. Cole;M. Contalbrigo;G.Costantini;M. Defurne;A.Deur;S. Diehl;R. Dupr'e;M. Ehrhart;Ishara Fernando;A. Filippi;T. Forest;J. Grames;P. Guèye;S. Habet;D. Higinbotham;A. Hobart;C.E.Hyde;K. Joo;A. Kim;V. Klimenko;H. Ko;V. Kubarovsky;M. Leali;P. Lenisa;D. Marchand;V. Mascagna;M. McCaughan;B. Mckinnon;A. Movsisyan;C. MunozCamacho;L. Pappalardo;E. Pasyuk;M. Poelker;K. Price;B. Raue;M. Shabestari;R. Santos;V. Sergeyeva;I. Strakovsky;P. Stoler;L. Venturelli;S. Zhao;Z.W.Zhao;The Clas Collaboration

International Workshop on Next Generation Gamma-Ray Source

• DOI: 10.1088/1361-6471/ac2827
• 发表时间: 2020-12
• 期刊: Journal of Physics G: Nuclear and Particle Physics
• 作者: C. Howell;Mohammad W. Ahmed;A. Afanasev;D. Alesini;J. Annand;A. Aprahamian;D. Balabanski;Stephen Benson;Aron Bernstein;C. Brune;J. Byrd;B. Carlsten;A. Champagne;S. Chattopadhyay;David Davis;E. Downie;J. Durham;G. Feldman;H. Gao;C. Geddes;H. Grießhammer;R. Hajima;H. Hao;D. Hornidge;J. Isaak;R. Janssens;D. Kendellen;M. Kovash;P. Martel;U. Meissner;R. Miskimen;B. Pasquini;D. Phillips;N. Pietralla;D. Savran;Matthias Schindler;M. Sikora;W. Snow;Roxanne Springer;C. Sun;Chuanxiang Tang;B. Tiburzi;A. Tonchev;W. Tornow;C. A. Ur;Dong Wang;H. Weller;V. Werner;Ying K. Wu;Jun Yan;Zheng Zhao;A. Zilges;F. Zomer