Related papers: Low-$Q^2$ elastic electron-proton scattering using…

Measurement of the vector analyzing power in elastic electron-proton scattering as a probe of double photon exchange amplitudes

We report the first measurement of the vector analyzing power in inclusive transversely polarized elastic electron-proton scattering at Q^2 = 0.1 (GeV/c)^2 and large scattering angles. This quantity should vanish in the single virtual…

Nuclear Experiment · Physics 2011-08-19 S. P. Wells , T. Averett , D. Barkhuff , D. H. Beck , E. J. Beise , C. Benson , H. Breuer , R. Carr , S. Covrig , J. DelCorso , G. Dodson , C. Eppstein , M. Farkhondeh , B. W. Filippone , T. Forest , P. Frasier , R. Hasty , T. M. Ito , C. Jones , W. Korsch , S. Kowalski , P. Lee , E. Maneva , K. McCarty , R. D. McKeown , J. Mikell , B. Mueller , P. Naik , M. L. Pitt , J. Ritter , V. Savu , D. T. Spayde , M. Sullivan , R. Tieulent , E. Tsentalovich , B. Yang , T. Zwart

Measurement of the proton electric to magnetic form factor ratio from \vec ^1H(\vec e, e'p)

We report the first precision measurement of the proton electric to magnetic form factor ratio from spin-dependent elastic scattering of longitudinally polarized electrons from a polarized hydrogen internal gas target. The measurement was…

Nuclear Experiment · Physics 2008-11-26 C. B. Crawford , A. Sindile , T. Akdogan , R. Alarcon , W. Bertozzi , E. Booth , T. Botto , J. Calarco , B. Clasie , A. DeGrush , T. W. Donnelly , K. Dow , D. Dutta , M. Farkhondeh , R. Fatemi , O. Filoti , W. Franklin , H. Gao , E. Geis , S. Gilad , W. Haeberli , D. Hasell , W. Hersman , M. Holtrop , P. Karpius , M. Kohl , H. Kolster , T. Lee , A. Maschinot , J. Matthews , K. McIlhany , N. Meitanis , R. G. Milner , J. Rapaport , R. P. Redwine , J. Seely , A. Shinozaki , S. Sirca , E. Six , T. Smith , B. Tonguc , C. Tschalaer , E. Tsentalovich , W. Turchinetz , J. F. J. van den Brand , J. van der Laan , F. Wang , T. Wise , Y. Xiao , W. Xu , C. Zhang , Z. Zhou , V. Ziskin , T. Zwart

Measurement of the Proton Structure Function F_2 at low Q^2 in QED Compton Scattering at HERA

The proton structure function F_2(x,Q^2) is measured in inelastic QED Compton scattering using data collected with the H1 detector at HERA. QED Compton events are used to access the kinematic range of very low virtualities of the exchanged…

High Energy Physics - Experiment · Physics 2012-08-27 H1 Collaboration

The Proton Elastic Form Factor Ratio at Low Momentum Transfer

High precision measurements of the proton elastic form factor ratio have been made at four-momentum transfers, Q^2, between 0.2 and 0.5 GeV^2. The new data, while consistent with previous results, clearly show a ratio less than unity and…

Nuclear Experiment · Physics 2010-03-23 G. Ron , J. Glister , B. Lee

A Cryogenic Supersonic Jet Target for Electron Scattering Experiments at MAGIX@MESA and MAMI

High-performance cluster-jet targets are ideally suited and applied since years in hadron and laser plasma physics. Therefore, the forthcoming MAGIX experiment at the future energy recovering electron accelerator MESA will use a cluster-jet…

Instrumentation and Detectors · Physics 2018-10-17 Silke Grieser , Daniel Bonaventura , Philipp Brand , Catharina Hargens , Benjamin Hetz , Lukas Leßmann , Christina Westphälinger , Alfons Khoukaz

Two-photon exchange amplitudes for the elastic $ep$ scattering at Q^2=2.5 GeV^2 from the experimental data

We extract two-photon exchange amplitudes for the elastic electron-proton scattering at Q^2=2.5 GeV^2 from the unpolarized cross-section and recent polarization transfer measurements. There are three independent amplitudes, but only one of…

High Energy Physics - Phenomenology · Physics 2015-03-17 Dmitry Borisyuk , Alexander Kobushkin

Elastic scattering at 7 TeV and high energy cross section for cosmic ray studies

The recent measurements of the elastic cross section by the TOTEM Collaboration together with the first estimations of the inelastic cross sections by other LHC detectors are used to test the simplest version of the geometrical model of the…

High Energy Physics - Phenomenology · Physics 2015-06-03 Tadeusz Wibig

Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering

We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q$^2$) up to 15.75~\gevsq. Combined with existing data, these provide an improved extraction of the proton magnetic form…

Nuclear Experiment · Physics 2022-03-24 M. E. Christy , T. Gautam , L. Ou , B. Schmookler , Y. Wang , D. Adikaram , Z. Ahmed , H. Albataineh , S. F. Ali , B. Aljawrneh , K. Allada , S. L. Allison , S. Alsalmi , D. Androic , K. Aniol , J. Annand , J. Arrington , H. Atac , T. Averett , C. Ayerbe Gayoso , X. Bai , J. Bane , S. Barcus , K. Bartlett , V. Bellini , R. Beminiwattha , J. Bericic , H. Bhatt , D. Bhetuwal , D. Biswas , E. Brash , D. Bulumulla , C. M. Camacho , J. Campbell , A. Camsonne , M. Carmignotto , J. Castellanos , C. Chen , J-P. Chen , T. Chetry , E. Cisbani , B. Clary , E. Cohen , N. Compton , J. C. Cornejo , S. Covrig Dusa , B. Crowe , S. Danagoulian , T. Danley , W. Deconinck , M. Defurne , C. Desnault , D. Di , M. Dlamini , M. Duer , B. Duran , R. Ent , C. Fanelli , E. Fuchey , C. Gal , D. Gaskell , F. Georges , S. Gilad , O. Glamazdin , K. Gnanvo , A. V. Gramolin , V. M. Gray , C. Gu , A. Habarakada , T. Hague , G. Hamad , D. Hamilton , K. Hamilton , O. Hansen , F. Hauenstein , A. V. Hernandez , W. Henry , D. W. Higinbotham , T. Holmstrom , T. Horn , Y. Huang , G. M. Huber , C. Hyde , H. Ibrahim , N. Israel , C-M. Jen , K. Jin , M. Jones , A. Kabir , B. Karki , C. Keppel , V. Khachatryan , P. M. King , S. Li , W. Li , H. Liu , J. Liu , A. H. Liyanage , D. Mack , J. Magee , S. Malace , J. Mammei , P. Markowitz , S. Mayilyan , E. McClellan , F. Meddi , D. Meekins , K. Mesick , R. Michaels , A. Mkrtchyan , B. Moffit , R. Montgomery , L. S. Myers , P. Nadel-Turonski , S. J. Nazeer , V. Nelyubin , D. Nguyen , N. Nuruzzaman , M. Nycz , R. F. Obrecht , K. Ohanyan , C. Palatchi , B. Pandey , K. Park , S. Park , C. Peng , F. D. Persio , R. Pomatsalyuk , E. Pooser , A. J. R. Puckett , V. Punjabi , B. Quinn , S. Rahman , M. N. H. Rashad , S. Riordan , J. Roche , I. Sapkota , A. Sarty , B. Sawatzky , N. H. Saylor , M. H. Shabestari , A. Shahinyan , S. Sirca , G. R. Smith , S. Sooriyaarachchilage , N. Sparveris , R. Spies , A. Stefanko , T. Su , A. Subedi , V. Sulkosky , A. Sun , Y. Tan , L. Thorne , N. Ton , F. Tortorici , R. Trotta , R. Uniyal , G. M. Urciuoli , E. Voutier , B. Waidyawansa , B. Wojtsekhowski , S. Wood , X. Yan , L. Ye , Z. H. Ye , C. Yero , J. Zhang , Y. X. Zhao , P. Zhu

First Measurement of Proton-Proton Elastic Scattering at RHIC

The first result of the pp2pp experiment at RHIC on elastic scattering of polarized protons at sqrt{s} = 200 GeV is reported here. The exponential slope parameter b of the diffractive peak of the elastic cross section in the t range 0.010…

Nuclear Experiment · Physics 2008-12-18 S. Bueltmann

Proton G_E/G_M from beam-target asymmetry

The ratio of the proton's electric to magnetic form factor, G_E/G_M, can be extracted in elastic electron-proton scattering by measuring either cross sections, beam-target asymmetry or recoil polarization. Separate determinations of G_E/G_M…

Nuclear Experiment · Physics 2008-11-26 M. K. Jones

Proton-tetraneutron elastic scattering

We analyze the elastic scattering of protons on a 4n system. This was used as part of the detection technique of a recent experiment [1] to search for the 4n (tetraneutron) as a bound particle. We show that it is unlikely that this process…

Nuclear Theory · Physics 2009-11-10 B. M. Sherrill , C. A. Bertulani

Constraints on the Nucleon Strange Form Factors at Q^2 ~ 0.1 GeV^2

We report the most precise measurement to date of a parity-violating asymmetry in elastic electron-proton scattering. The measurement was carried out with a beam energy of 3.03 GeV and a scattering angle <theta_lab>=6 degrees, with the…

Nuclear Experiment · Physics 2012-08-27 The HAPPEX Collaboration

Determination of two-photon exchange amplitudes from elastic electron-proton scattering data

Using the available cross section and polarization data for elastic electron-proton scattering, we provide an extraction of the two-photon exchange amplitudes at a common value of four-momentum transfer, around Q^2 = 2.5 GeV^2. This…

High Energy Physics - Phenomenology · Physics 2015-05-20 Julia Guttmann , Nikolai Kivel , Mehdi Meziane , Marc Vanderhaeghen

Measuring the weak mixing angle with the P2 experiment at MESA

The P2 experiment in Mainz aims to measure the weak mixing angle in electron- proton scattering to a precision of 0.13 %. In order to suppress uncertainties due to proton structure and contributions from box graphs, both a low average…

Instrumentation and Detectors · Physics 2016-12-20 Niklaus Berger , Kurt Aulenbacher , Sebastian Baunack , Dominik Becker , Jürgen Diefenbach , Michael Gericke , Kathrin Gerz , Ruth Herbertz , Krishna Kumar , Frank Maas , Matthias Molitor , David Rodríguez Piñeiro , Iurii Sorokin , Paul Souder , Hubert Spiesberger , Alexey Tyukin , Valery Tyukin , Marco Zimmermann

The P2 Experiment - A future high-precision measurement of the electroweak mixing angle at low momentum transfer

This article describes the future P2 parity-violating electron scattering facility at the upcoming MESA accelerator in Mainz. The physics program of the facility comprises indirect, high precision search for physics beyond the Standard…

Nuclear Experiment · Physics 2018-12-26 Dominik Becker , Razvan Bucoveanu , Carsten Grzesik , Ruth Kempf , Kathrin Imai , Matthias Molitor , Alexey Tyukin , Marco Zimmermann , David Armstrong , Kurt Aulenbacher , Sebastian Baunack , Rakitha Beminiwattha , Niklaus Berger , Peter Bernhard , Andrea Brogna , Luigi Capozza , Silviu Covrig Dusa , Wouter Deconinck , Jürgen Diefenbach , Jens Erler , Ciprian Gal , Boris Gläser , Boxing Gou , Wolfgang Gradl , Michael Gericke , Mikhail Gorchtein , Yoshio Imai , Krishna S. Kumar , Frank Maas , Juliette Mammei , Jie Pan , Preeti Pandey , Kent Paschke , Ivan Perić , Mark Pitt , Sakib Rahman , Seamus Riordan , David Rodríguez Piñeiro , Concettina Sfienti , Iurii Sorokin , Paul Souder , Hubert Spiesberger , Michaela Thiel , Valery Tyukin , Quirin Weitzel

Measurement of two-photon exchange effect by comparing elastic $e^\pm p$ cross sections

[Background] The electromagnetic form factors of the proton measured by unpolarized and polarized electron scattering experiments show a significant disagreement that grows with the squared four momentum transfer ($Q^{2}$). Calculations…

Nuclear Experiment · Physics 2017-06-20 D. Rimal , D. Adikaram , B. A. Raue , L. B. Weinstein , J. Arrington , W. K. Brooks , M. Ungaro , K. P. Adhikari , Z. Akbar , S. Anefalos Pereira , R. A. Badui , J. Ball , N. A. Baltzell , M. Battaglieri , V. Batourine , I. Bedlinskiy , R. P. Bennett , A. S. Biselli , S. Boiarinov , W. J. Briscoe , S. Bültmann , D. S. Carman , A. Celentano , T. Chetry , G. Ciullo , L. Clark , L. Colaneri , P. L. Cole , N. Compton , M. Contalbrigo , O. Cortes , V. Crede , A. D'Angelo , N. Dashyan , R. De Vita , A. Deur , C. Djalali , R. Dupre , H. Egiyan , A. El Alaoui , L. El Fassi , P. Eugenio , G. Fedotov , R. Fersch , A. Filippi , J. A. Fleming , T. A. Forest , A. Fradi , N. Gevorgyan , Y. Ghandilyan , G. P. Gilfoyle , K. L. Giovanetti , F. X. Girod , C. Gleason , W. Gohn , E. Golovatch , R. W. Gothe , K. A. Griffioen , L. Guo , K. Hafidi , C. Hanretty , N. Harrison , M. Hattawy , D. Heddle , K. Hicks , M. Holtrop , S. M. Hughes , Y. Ilieva , D. G. Ireland , B. S. Ishkhanov , E. L. Isupov , D. Jenkins , H. Jiang , S. Joosten , D. Keller , P. Khetarpal , G. Khachatryan , M. Khandaker , W. Kim , A. Klein , F. J. Klein , V. Kubarovsky , S. E. Kuhn , S. V. Kuleshov , L. Lanza , P. Lenisa , K. Livingston , H. Y. Lu , I . J . D. MacGregor , N. Markov , B. McKinnon , M. D. Mestayer , M. Mirazita , V. Mokeev , A Movsisyan , E. Munevar , C. Munoz Camacho , P. Nadel-Turonski , A. Ni , S. Niccolai , G. Niculescu , I. Niculescu , M. Osipenko , A. I. Ostrovidov , M. Paolone , R. Paremuzyan , K. Park , E. Pasyuk , W. Phelps , S. Pisano , O. Pogorelko , J. W. Price , Y. Prok , D. Protopopescu , A. J. R. Puckett , A. Rizzo , G. Rosner , P. Rossi , P. Roy , F. Sabatié , C. Salgado , R. A. Schumacher , E. Seder , Y. G. Sharabian , Iu. Skorodumina , G. D. Smith , D. Sokhan , N. Sparveris , Ivana Stankovic , S. Stepanyan , S. Strauch , V. Sytnik , M. Taiuti , B. Torayev , H. Voskanyan , E. Voutier , N. K. Walford , D. P. Watts , X. Wei , M. H. Wood , N. Zachariou , L. Zana , J. Zhang , Z. W. Zhao , I. Zonta

Elastic and quasi-elastic electron scattering on the N = 14, 20, and 28 isotonic chains

We present theoretical predictions for electron scattering on the N = 14, 20, and 28 isotonic chains from proton-deficient to proton-rich nuclei. The calculations are performed within the framework of the distorted-wave Born approximation…

Nuclear Theory · Physics 2014-04-01 Andrea Meucci , Matteo Vorabbi , Carlotta Giusti , Franco Davide Pacati , Paolo Finelli

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

Measurement of the Generalized Polarizabilities of the Proton in Virtual Scattering at Q2=0.92 and 1.76 GeV2: I. Low Energy Expansion Analysis

Virtual Compton Scattering is studied at the Thomas Jefferson National Accelerator Facility at low Center-of-Mass energies, below pion threshold. Following the Low Energy Theorem for the $ ep \to ep \gamma$ process, we obtain values for the…

High Energy Physics - Phenomenology · Physics 2013-05-29 The Jefferson Lab Hall A Collaboration , S. Jaminion

Density Changes in Low Pressure Gas Targets for Electron Scattering Experiments

A system of modular sealed gas target cells has been developed for use in electron scattering experiments at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). This system was initially developed to complete the MARATHON…

Instrumentation and Detectors · Physics 2019-06-28 S. N. Santiesteban , S. Alsalmi , D. Meekins , J. Bane , S. Barcus , J. Campbell , J. Castellanos , R. Cruz-Torres , H. Dai , T. Hague , F. Hauenstein , D. W. Higinbotham , R. J. Holt , T. Kutz , S. Li , H. Liu , R. E. McClellan , M. Nycz , D. Nguyen , B. Pandey , V. Pandey , A. Schmidt , T. Su , Z. Ye