Related papers: APEX: A Prime EXperiment at Jefferson Lab

The Heavy Photon Search experiment at Jefferson Laboratory

The Heavy Photon Search experiment (HPS) at Jefferson Laboratory will search for a new $U(1)$ massive gauge boson, or "heavy-photon," mediator of a new fundamental interaction, called "dark-force," that couples to ordinary photons trough…

Instrumentation and Detectors · Physics 2019-08-13 Andrea Celentano

Search for a Hypothetical 16.7 MeV Gauge Boson and Dark Photons in the NA64 Experiment at CERN

We report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of e+e- pairs observed in the excited Be-8 nucleus decays. Due to its coupling to electrons, the X could be produced in the…

High Energy Physics - Experiment · Physics 2018-06-12 D. Banerjee , V. E. Burtsev , A. G. Chumakov , D. Cooke , P. Crivelli , E. Depero , A. V. Dermenev , S. V. Donskov , R. R. Dusaev , T. Enik , N. Charitonidis , A. Feshchenko , V. N. Frolov , A. Gardikiotis , S. G. Gerassimov , S. N. Gninenko , M. Hosgen , M. Jeckel , A. E. Karneyeu , G. Kekelidze , B. Ketzer , D. V. Kirpichnikov , M. M. Kirsanov , I. V. Konorov , S. G. Kovalenko , V. A. Kramarenko , L. V. Kravchuk , N. V. Krasnikov , S. V. Kuleshov , V. E. Lyubovitskij , V. Lysan , V. A. Matveev , Yu. V. Mikhailov , D. V. Peshekhonov , V. A. Polyakov , B. Radics , R. Rojas , A. Rubbia , V. D. Samoylenko , V. O. Tikhomirov , D. A. Tlisov , A. N. Toropin , A. Yu. Trifonov , B. I. Vasilishin , G. Vasquez Arenas , P. V. Volkov , V. Volkov , P. Ulloa

First Results from The GlueX Experiment

The GlueX experiment at Jefferson Lab ran with its first commissioning beam in late 2014 and the spring of 2015. Data were collected on both plastic and liquid hydrogen targets, and much of the detector has been commissioned. All of the…

Nuclear Experiment · Physics 2016-05-30 The GlueX Collaboration , H. Al Ghoul , E. G. Anassontzis , F. Barbosa , A. Barnes , T. D. Beattie , D. W. Bennett , V. V. Berdnikov , T. Black , W. Boeglin , W. K. Brooks , B. Cannon , O. Chernyshov , E. Chudakov , V. Crede , M. M. Dalton , A. Deur , S. Dobbs , A. Dolgolenko , M. Dugger , H. Egiyan , P. Eugenio , A. M. Foda , J. Frye , S. Furletov , L. Gan , A. Gasparian , A. Gerasimov , N. Gevorgyan , V. S. Goryachev , B. Guegan , L. Guo , H. Hakobyan , H. Hakobyan2 , J. Hardin , G. M. Huber , D. Ireland , M. M. Ito , N. S. Jarvis , R. T. Jones , V. Kakoyan , M. Kamel , F. J. Klein , C. Kourkoumeli , S. Kuleshov , M. Lara , I. Larin , D. Lawrence , J. Leckey , W. I. Levine , K. Livingston , G. J. Lolos , D. Mack , P. T. Mattione , V. Matveev , M. McCaughan , W. McGinley , J. McIntyre , R. Mendez , C. A. Meyer , R. Miskimen , R. E. Mitchell , F. Mokaya , K. Moriya , G. Nigmatkulov , N. Ochoa , A. I. Ostrovidov , Z. Papandreou , R. Pedroni , M. Pennington , L. Pentchev , A. Ponosov , E. Pooser , B. Pratt , Y. Qiang , J. Reinhold , B. G. Ritchie , L. Robison , D. Romanov , C. Salgado , R. A. Schumacher , A. Yu. Semenov , I. A. Semenova , I. Senderovich , K. K. Seth , M. R. Shepherd , E. S. Smith , D. I. Sober , A. Somov , S. Somov , O. Soto , N. Sparks , M. J. Staib , J. R. Stevens , A. Subedi , V. Tarasov , S. Taylor , I. Tolstukhin , A. Tomaradze , A. Toro , A. Tsaris , G. Vasileiadis , I. Vega , G. Voulgaris , N. K. Walford , T. Whitlatch , M. Williams , E. Wolin , T. Xiao , J. Zarling , B. Zihlmann

High Precision Measurement of Compton Scattering in the 5 GeV region

The cross section of atomic electron Compton scattering $\gamma + e \rightarrow \gamma^\prime + e^\prime $ was measured in the 4.40--5.475 GeV photon beam energy region by the {\em PrimEx} collaboration at Jefferson Lab with an accuracy of…

Nuclear Experiment · Physics 2019-10-29 P. Ambrozewicz , L. Ye , Y. Prok , I. Larin , A. Ahmidouch , K. Baker , V. Baturin , L. Benton , A. Bernstein , V. Burkert , E. Clinton , P. L. Cole , P. Collins , D. Dale , S. Danagoulian , G. Davidenko , R. Demirchyan , A. Deur , A. Dolgolenko , D. Dutta , G. Dzyubenko , A. Evdokimov , G. Fedotov , J. Feng , M. Gabrielyan , L. Gan , H. Gao , A. Gasparian , N. Gevorkyan , S. Gevorkyan , A. Glamazdin , V. Goryachev , L. Guo , V. Gyurjyan , K. Hardy , J. He , E. Isupov , M. Ito , L. Jiang , H. Kang , D. Kashy , M. Khandaker , P. Kingsberry , F. Klein , A. Kolarkar , M. Konchatnyi , O. Korchin , W. Korsch , O. Kosinov , S. Kowalski , M. Kubantsev , A. Kubarovsky , V. Kubarovsky , D. Lawrence , X. Li , M. Levillain , H. Lu , L. Ma , P. Martel , V. Matveev , D. McNulty , B. Mecking , A. Micherdzinska , B. Milbrath , R. Minehart , R. Miskimen , V. Mochalov , B. Morrison , S. Mtingwa , I. Nakagawa , S. Overby , E. Pasyuk , M. Payen , K. Park , R Pedroni , W. Phelps , D. Protopopescu , D. Rimal , B. G. Ritchie , D. Romanov , C Salgado , A. Shahinyan , A Sitnikov , D. Sober , S. Stepanyan , W. Stephens , V. Tarasov , S. Taylor , A. Teymurazyan , J. Underwood , A. Vasiliev , V. Vishnyakov , D. P. Weygand , M. Wood , Y. Zhang , S. Zhou , B. Zihlmann

First Axion Search Results of the SUPAX Prototype Experiment

The SUPerconduction AXion search experiment (Supax) is a future haloscope-type detector designed to probe axion-like particles (ALPs) as candidates for dark matter and solutions to the strong-CP problem in the mass range between $8\,\mu$eV…

High Energy Physics - Experiment · Physics 2026-03-12 Tim Schneemann , Hendrik Bekker , Dmitry Budker , Kristof Schmieden , Matthias Schott , Malavika Unni , Arne Wickenbrock

Search for Sub-GeV Axion-Like Particles at EBES Pilot Run Using 4 GeV Positron Beam at KEK LINAC

We report the results of a search for sub-GeV axion-like particles (ALPs) using pilot run data from the Electron Beam-dump Experiment at KEK LINAC Switching Yard 3 (EBES). The data were collected in December 2023 with a 4 GeV positron beam…

High Energy Physics - Experiment · Physics 2026-05-11 Takahiro Fusayasu , Tomoya Iizawa , Fumihito Ikeda , Akimasa Ishikawa , Masako Iwasaki , Hiroshi Iwase , Takahiro Kawahara , Aoi Masaki , Fusashi Miyahara , Yu Morikawa , Yuichi Okayasu , Toshiyuki Ono , Hidetoshi Otono , Yasuhito Sakaki , Takumi Seino , Yuta Shimasaki , Taikan Suehara , Yosuke Takubo , Shusaku Tsumura , Kosuke Uemura , Yifu Zhang

High Precision Measurement of the Proton Elastic Form Factor Ratio at Low $Q^2$

Jefferson Lab experiment E08-007 measured the proton elastic form factor ratio $\mu_pG_E/G_M$ in the range of $Q^2=0.3-0.7(\mathrm{GeV}/c)^2$ by recoil polarimetry. Data were taken in 2008 at the Thomas Jefferson National Accelerator…

Nuclear Experiment · Physics 2011-08-25 Xiaohui Zhan

Recent highlights and plans of the AWAKE experiment

The Advanced Wakefield Experiment (AWAKE) is an accelerator R&D experiment at CERN using, for the first time, a high-energy proton bunch to drive wakefields in plasma and accelerating electrons to the GeV energy scale. The principle of the…

Accelerator Physics · Physics 2020-12-10 Giovanni Zevi Della Porta

Precise Beam Energy Determination for Hall A after the CEBAF 12 GeV Upgrade

Precise and accurate measurements of the beam energy delivered to the experimental halls at the Thomas Jefferson Accelerator Facility (Jefferson Lab) is required by many experiments for proper data analysis and physics event reconstruction.…

Accelerator Physics · Physics 2021-10-15 S. N. Santiesteban , L. Tracy , D. Flay , D. W. Higinbotham , D. Marchand , P. Vernin , A Saha

Jefferson Lab Science, Past and Future

The Continuous Electron Beam Accelerator Facility (CEBAF) and associated experimental equipment at Jefferson Lab comprise a unique facility for experimental nuclear physics. This facility is presently being upgraded, which will enable a new…

Nuclear Experiment · Physics 2015-06-23 R. D. McKeown

Photoproduction of axion-like particles

We explore the sensitivity of photon-beam experiments to axion-like particles (ALPs) with QCD-scale masses whose dominant coupling to the Standard Model is either to photons or gluons. We introduce a novel data-driven method that eliminates…

High Energy Physics - Phenomenology · Physics 2020-04-15 Daniel Aloni , Cristiano Fanelli , Yotam Soreq , Mike Williams

Spin-Density Matrix Elements for Vector Meson Photoproduction at GlueX

The GlueX experiment at Jefferson Lab aims to study the light meson spectrum with an emphasis on the search for hybrid mesons. To this end, a linearly-polarized $9\,$GeV photon beam impinges on a hydrogen target contained within a detector…

Nuclear Experiment · Physics 2020-08-26 A. Austregesilo

Axion-Like Particles at the ILC Giga-Z

Axion-Like Particles (ALPs) are a generic, calculable, and well motivated extension of the Standard Model with far reaching phenomenology. ALPs that couple only to hypercharge represent one subset of such models, coupling the ALP to both…

High Energy Physics - Phenomenology · Physics 2021-09-15 Noah Steinberg , James D. Wells

Search for photoproduction of axion-like particles at GlueX

We present a search for axion-like particles, $a$, produced in photon-proton collisions at a center-of-mass energy of approximately 4 GeV, focusing on the scenario where the $a$-gluon coupling is dominant. The search uses $a\to\gamma\gamma$…

High Energy Physics - Experiment · Physics 2022-03-28 GlueX Collaboration , S. Adhikari , C. S. Akondi , M. Albrecht , A. Ali , M. Amaryan , A. Asaturyan , A. Austregesilo , Z. Baldwin , F. Barbosa , J. Barlow , E. Barriga , R. Barsotti , T. D. Beattie , V. V. Berdnikov , T. Black , W. Boeglin , W. J. Briscoe , T. Britton , W. K. Brooks , E. Chudakov , S. Cole , P. L. Cole , O. Cortes , V. Crede , M. 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. M. Foda , S. Furletov , L. Gan , H. Gao , A. Gasparian , C. Gleason , K. Goetzen , V. S. Goryachev , L. Guo , M. Hagen , H. Hakobyan , A. Hamdi , J. Hernandez , N. D. Hoffman , G. Hou , G. M. Huber , A. Hurley , D. G. Ireland , M. M. Ito , I. Jaegle , N. S. Jarvis , R. T. Jones , V. Kakoyan , G. Kalicy , M. Kamel , V. Khachatryan , M. Khatchatryan , C. Kourkoumelis , S. Kuleshov , A. LaDuke , I. Larin , D. Lawrence , D. I. Lersch , H. Li , W. B. Li , B. Liu , K. Livingston , G. J. Lolos , L. Lorenti , K. Luckas , V. Lyubovitskij , D. Mack , A. Mahmood , H. Marukyan , V. Matveev , M. McCaughan , M. McCracken , C. A. Meyer , R. Miskimen , R. E. Mitchell , K. Mizutani , V. Neelamana , F. Nerling , L. Ng , A. I. Ostrovidov , Z. Papandreou , C. Paudel , P. Pauli , R. Pedroni , L. Pentchev , K. J. Peters , J. Reinhold , B. G. Ritchie , J. Ritman , G. Rodriguez , D. Romanov , C. Romero , K. Saldana , C. Salgado , S. Schadmand , A. M. Schertz , A. Schick , A. Schmidt , R. A. Schumacher , J. Schwiening , P. Sharp , X. Shen , M. R. Shepherd , A. Smith , E. S. Smith , D. I. Sober , A. Somov , S. Somov , O. Soto , J. R. Stevens , I. I. Strakovsky , B. Sumner , K. Suresh , V. 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

Particle physics experiments based on the AWAKE acceleration scheme

New particle acceleration schemes open up exciting opportunities, potentially providing more compact or higher-energy accelerators. The AWAKE experiment at CERN is currently taking data to establish the method of proton-driven plasma…

Accelerator Physics · Physics 2019-09-04 M. Wing

The Silicon Vertex Tracker for the Heavy Photon Search Experiment

The Heavy Photon Search (HPS) is a new, dedicated experiment at Thomas Jefferson National Accelerator Facility (JLab) to search for a massive vector boson, the heavy photon (a.k.a. dark photon, \Aprimebold{}), in the mass range…

Instrumentation and Detectors · Physics 2019-08-13 Per Hansson Adrian

Accessing glue through photoproduction measurements at GlueX

Photoproduction experiments are a key tool in the investigation of the spectrum of hadronic states and the way gluons contribute to this spectrum. The GlueX experiment, located at Jefferson Lab, features a linearly polarized tagged photon…

High Energy Physics - Experiment · Physics 2021-12-13 Peter Pauli

Overview of Nuclear Physics at Jefferson Lab

The Continuous Electron Beam Accelerator Facility (CEBAF) and associated experimental equipment at Jefferson Lab comprise a unique facility for experimental nuclear physics. This facility is presently being upgraded, which will enable a new…

Accelerator Physics · Physics 2013-03-27 R. D. McKeown

Search for solar axions by Primakoff effect with the full dataset of the CDEX-1B Experiment

We present the first limit on $g_{A\gamma}$ coupling constant using the Bragg-Primakoff conversion based on an exposure of 1107.5 kg days of data from the CDEX-1B experiment at the China Jinping Underground Laboratory. The data are…

High Energy Physics - Experiment · Physics 2024-05-14 L. T. Yang , S. K. Liu , Q. Yue , K. J. Kang , Y. J. Li , H. P. An , Greeshma C. , J. P. Chang , Y. H. Chen , J. P. Cheng , W. H. Dai , Z. Deng , C. H. Fang , X. P. Geng , H. Gong , Q. J. Guo , T. Guo , X. Y. Guo , L. He , J. R. He , J. W. Hu , H. X. Huang , T. C. Huang , L. Jiang , S. Karmakar , H. B. Li , H. Y. Li , J. M. Li , J. Li , M. C. Li , Q. Y. Li , R. M. J. Li , X. Q. Li , Y. L. Li , Y. F. Liang , B. Liao , F. K. Lin , S. T. Lin , J. X. Liu , Y. D. Liu , Y. Liu , Y. Y. Liu , H. Ma , Y. C. Mao , Q. Y. Nie , H. Pan , N. C. Qi , J. Ren , X. C. Ruan , M. B. Shen , M. K. Singh , T. X. Sun , W. L. Sun , C. J. Tang , Y. Tian , G. F. Wang , J. Z. Wang , L. Wang , Q. Wang , Y. F. Wang , Y. X. Wang , H. T. Wong , Y. C. Wu , H. Y. Xing , K. Z. Xiong , R. Xu , Y. Xu , T. Xue , Y. L. Yan , N. Yi , C. X. Yu , H. J. Yu , M. Zeng , Z. Zeng , B. T. Zhang , F. S. Zhang , L. Zhang , P. Zhang , Z. H. Zhang , Z. Y. Zhang , J. Z. Zhao , K. K. Zhao , M. G. Zhao , J. F. Zhou , Z. Y. Zhou , J. J. Zhu

The GlueX Beamline and Detector

The GlueX experiment at Jefferson Lab has been designed to study photoproduction reactions with a 9-GeV linearly polarized photon beam. The energy and arrival time of beam photons are tagged using a scintillator hodoscope and a…

Instrumentation and Detectors · Physics 2022-03-17 S. Adhikari , C. S. Akondi , H. Al Ghoul , A. Ali , M. Amaryan , E. G. Anassontzis , A. Austregesilo , F. Barbosa , J. Barlow , A. Barnes , E. Barriga , R. Barsotti , T. D. Beattie , J. Benesch , V. V. Berdnikov , G. Biallas , T. Black , W. Boeglin , P. Brindza , W. J. Briscoe , T. Britton , J. Brock , W. K. Brooks , B. E. Cannon , C. Carlin , D. S. Carman , T. Carstens , N. Cao , O. Chernyshov , E. Chudakov , S. Cole , O. Cortes , W. D. Crahen , V. Crede , M. 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. M. Foda , J. Foote , J. Frye , S. Furletov , L. Gan , A. Gasparian , A. Gerasimov , N. Gevorgyan , C. Gleason , K. Goetzen , A. Goncalves V. S. Goryachev , L. Guo , H. Hakobyan , A. Hamdi , J. Hardin , C. L. Henschel , G. M. Huber , C. Hutton , A. Hurley , P. Ioannou , D. G. Ireland , M. M. Ito , N. S. Jarvis , R. T. Jones , V. Kakoyan , S. Katsaganis , G. Kalicy , M. Kamel , C. D. Keith , F. J. Klein , R. Kliemt , D. Kolybaba , C. Kourkoumelis , S. T. Krueger , S. Kuleshov , I. Larin , D. Lawrence , J. P. Leckey , D. I. Lersch , B. D. Leverington , W. I. Levine , W. Li , B. Liu , K. Livingston , G. J. Lolos , V. Lyubovitskij , D. Mack , H. Marukyan , P. T. Mattione , V. Matveev , M. McCaughan , M. McCracken , W. McGinley , J. McIntyre , D. Meekins , R. Mendez , C. A. Meyer , R. Miskimen , R. E. Mitchell , F. Mokaya , K. Moriya , F. Nerling , L. Ng , H. Ni , A. I. Ostrovidov , Z. Papandreou , M. Patsyuk , C. Paudel , P. Pauli , R. Pedroni , L. Pentchev , K. J. Peters , W. Phelps , J. Pierce , E. Pooser , V. Popov , B. Pratt , Y. Qiang , N. Qin , V. Razmyslovich , J. Reinhold , B. G. Ritchie , J. Ritman , L. Robison , D. Romanov , C. Romero , C. Salgado , N. Sandoval , T. Satogata , A. M. Schertz , S. Schadmand , A. Schick , R. A. Schumacher , C. Schwarz , J. Schwiening , A. Yu. Semenov , I. A. Semenova , K. K. Seth , X. Shen , M. R. Shepherd , E. S. Smith , D. I. Sober , A. Somov , S. Somov , O. Soto , N. Sparks , M. J. Staib , C. Stanislav , J. R. Stevens , J. Stewart , I. I. Strakovsky , B. C. L. Summner , K. Suresh , V. V. Tarasov , S. Taylor , L. A. Teigrob , A. Teymurazyan , A. Thiel , I. Tolstukhin , A. Tomaradze , A. Toro , A. Tsaris , Y. Van Haarlem , G. Vasileiadis , I. Vega , G. Visser , G. Voulgaris , N. K. 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