相关论文: New Results on the $\pi^{+}\pi^{-}$ Electroproduct…

Model Analysis of the $ep \to ep'\pi^+\pi^-$ Electroproduction Reaction on the Proton

Recent CLAS data on the $p\pi^+\pi^-$ electroproduction off protons at 1.3$<$W$<$1.57 GeV and 0.25$<$$Q^{2}$$<$0.6 GeV$^{2}$ have been analyzed using a meson-baryon phenomenological model. By fitting nine 1-fold differential cross section…

高能物理 - 唯象学 · 物理学 2009-11-06 Viktor Mokeev , Volker Burkert , Tsung-Shung H. Lee , Latifa Elouadrhiri , Gleb Fedotov , Boris Ishkhanov

Electroproduction of p \pi^{+} \pi^{-} off protons at 0.2<Q^{2}<0.6 GeV^{2} and 1.3<W<1.57 GeV with CLAS

This paper reports on the most comprehensive data set obtained on differential and fully integrated cross sections for the process $e p \to e' p \pi^{+} \pi^{-} $. The data were collected with the CLAS detector at Jefferson Laboratory.…

核实验 · 物理学 2019-08-13 G. V. Fedotov , V. I. Mokeev , V. D. Burkert , L. Elouadrhiri , E. N. Golovatch , B. S. Ishkhanov , E. L. Isupov , N. V. Shvedunov

Exclusive $\bm{\pi^{0}p}$ electroproduction off protons in the resonance region at photon virtualities 0.4~GeV$\bm{^{2}}$ $\bm{\leq~ Q^{2} \leq~1}$~GeV$\bm{^{2}}$

The exclusive electroproduction process $ep \rightarrow e'p'\pi^{0}$ was measured in the range of photon virtualities $Q^{2} = 0.4 - 1.0$~GeV$^{2}$ and the invariant mass range of the $p\pi^{0}$ system of $W = 1.1 - 1.8$~GeV. These…

核实验 · 物理学 2020-01-29 N. Markov , K. Joo , V. D. Burkert , V. I. Mokeev , L. C. Smith , M. Ungaro , S. Adhikari , M. J. ~Amaryan , G. Angelini , H. ~Atac , H. ~Avakian , C. Ayerbe Gayoso , N. A. ~Baltzell , L. Barion , M. ~Battaglieri , I. ~Bedlinskiy , I. ~Bedlinskiy , F. Benmokhtar , A. S. ~Biselli , F. ~Bossù , S. ~Boiarinov , W. J. ~Briscoe , W. K. ~Brooks , D. S. ~Carman , J. C. ~Carvajal , A. ~Celentano , P. ~Chatagnon , T. Chetry , P. L. ~Cole , M. ~Contalbrigo , V. ~Crede , G. Ciullo , A. ~D'Angelo , N. ~Dashyan , R. ~De~Vita , E. ~De~Sanctis , M. Defurne , A. ~Deur , S. Diehl , C. ~Djalali , R. ~Dupre , M. ~Ehrhart , A. ~El~Alaoui , L. ~El~Fassi , P. ~Eugenio , C. ~Evans , A. ~Filippi , Y. ~Ghandilyan , F. X. ~Girod , E. ~Golovatch , R. W. ~Gothe , K. A. ~Griffioen , M. ~Guidal , K. ~Hafidi , H. ~Hakobyan , M. ~Hattawy , T. B. ~Hayward , K. ~Hicks , M. ~Holtrop , Y. ~Ilieva , D. G. ~Ireland , B. S. ~Ishkhanov , E. L. ~Isupov , D. ~Jenkins , H. S. ~Jo , D. ~Keller , M. ~Khachatryan , A. ~Khanal , M. ~Khandaker , A. ~Kim , C. W. ~Kim , W. ~Kim , F. J. ~Klein , V. ~Kubarovsky , L. Lanza , M. ~Leali , K. ~Livingston , I . J . D. ~MacGregor , D. ~Marchand , V. ~Mascagna , B. ~McKinnon , T. ~Mineeva , M. ~Mirazita , P. ~Nadel-Turonski , S. ~Nanda , S. ~Niccolai , G. ~Niculescu , M. ~Osipenko , M. ~Paolone , L. L. ~Pappalardo , R. ~Paremuzyan , K. ~Park , E. ~Pasyuk , W. ~Phelps , O. ~Pogorelko , J. W. ~Price , Y. ~Prok , D. ~Protopopescu , M. ~Ripani , D. Riser , A. ~Rizzo , J. ~Rowley , F. ~Sabatié , C. ~Salgado , R. A. ~Schumacher , Y. G. ~Sharabian , U. ~Shrestha , D. ~Sokhan , O. ~Soto , N. ~Sparveris , S. ~Stepanyan , P. ~Stoler , I. I. ~Strakovsky , S. ~Strauch , M. ~Taiuti , J. A. ~Tan , N. ~Tyler , L. ~Venturelli , H. ~Voskanyan , E. ~Voutier , R. Wang , X. ~Wei , M. H. ~Wood , N. ~Zachariou

Transition nucleon resonance electrocouplings from CLAS data on $\pi^{+}\pi^{-}p$ electroproduction off protons

Electrocouplings of excited proton states with masses less than 1.8 GeV were determined for the first time from the CLAS data on $\pi^+\pi^-p$ electroproduction at photon virtualities $Q^2$ $<$ 1.5 GeV$^2$. Electrocouplings were obtained…

核实验 · 物理学 2015-05-20 Victor I. Mokeev

Recent results on nucleon resonance electrocouplings from the studies of $\pi^{+}\pi^{-}p$ electroproduction with the CLAS detector

Recent results on nucleon resonance studies in $\pi^{+}\pi^{-}p$ electro- production off protons with the CLAS detector are presented. The analysis of CLAS data allowed us to determine all essential contributing mechanisms, providing a…

高能物理 - 实验 · 物理学 2015-05-13 V. I. Mokeev , V. D. Burkert , G. V. Fedotov , E. N. Golovach , B. S. Ishkhanov

Exclusive $\pi^+$ electroproduction off the proton from low to high -t

Background: Measurements of exclusive meson production are a useful tool in the study of hadronic structure. In particular, one can discern the relevant degrees of freedom at different distance scales through these studies. Purpose: To…

核实验 · 物理学 2020-01-08 S. Basnet , G. M. Huber , W. B. Li , H. P. Blok , D. Gaskell , T. Horn , K. Aniol , J. Arrington , E. J. Beise , W. Boeglin , E. J. Brash , H. Breuer , C. C. Chang , M. E. Christy , R. Ent , E. Gibson , R. J. Holt , S. Jin , M. K. Jones , C. E. Keppel , W. Kim , P. M. King , V. Kovaltchouk , J. Liu , G. J. Lolos , D. J. Mack , D. J. Margaziotis , P. Markowitz , A. Matsumura , D. Meekins , T. Miyoshi , H. Mkrtchyan , I. Niculescu , Y. Okayasu , L. Pentchev , C. Perdrisat , D. Potterveld , V. Punjabi , P. Reimer , J. Reinhold , J. Roche , A. Sarty , G. R. Smith , V. Tadevosyan , L. G. Tang , V. Tvaskis , J. Volmer , W. Vulcan , G. Warren , S. A. Wood , C. Xu , X. Zheng

Cross sections and beam asymmetries for $\vev{e}p \to en\pi^+$ in the nucleon resonance region for $1.7 \le Q^2 \le 4.5 (GeV)^2$

The exclusive electroproduction process $\vec{e}p \to e^\prime n \pi^+$ was measured in the range of the photon virtuality $Q^2 = 1.7 - 4.5 \rm{GeV^2}$, and the invariant mass range for the $n\pi^+$ system of $W = 1.15 - 1.7 \rm{GeV}$ using…

核实验 · 物理学 2010-04-06 K. Park , V. D. Burkert , W. Kim , CLAS Collaboration

Backward electroproduction of pi0 mesons on protons in the region of nucleon resonances at four momentum transfer squared Q**2 = 1.0 GeV**2

Exclusive electroproduction of pi0 mesons on protons in the backward hemisphere has been studied at Q**2 = 1.0 GeV**2 by detecting protons in the forward direction in coincidence with scattered electrons from the 4 GeV electron beam in…

核实验 · 物理学 2019-08-14 G. Laveissiere

Double-pion electroproduction off protons in deuterium: Quasifree cross sections and final-state interactions

The single-differential and fully integrated cross sections for quasifree $\pi^{+}\pi^{-}$ electroproduction off protons bound in deuterium have been extracted for the first time. The experimental data were collected at Jefferson Laboratory…

核实验 · 物理学 2024-06-12 Iu. A. Skorodumina , G. V. Fedotov , R. W. Gothe , the CLAS Collaboration

Measurements of the $\gamma_{v} p \rightarrow p' \pi^{+} \pi^{-}$ cross section with the CLAS detector for $0.4$ GeV$^{2}$ $< Q^{2} <$ $1.0$ GeV$^{2}$ and $1.3$ GeV $< W <$ $1.825$ GeV

New results on the single-differential and fully-integrated cross sections for the process $\gamma_{v} p \rightarrow p' \pi^{+} \pi^{-}$ are presented. The experimental data were collected with the CLAS detector at Jefferson Laboratory.…

核实验 · 物理学 2018-11-20 G. V. Fedotov , Iu. A. Skorodumina , V. D. Burkert , R. W. Gothe , K. Hicks , V. I. Mokeev , the CLAS Collaboration

Measurements of $e p \to e' \pi^+ \pi^- p'$ Cross Sections with CLAS at $1.40 < W < 2.0$ GeV and $2.0 < Q^2 < 5.0$ GeV$^2$

This paper reports new exclusive cross sections for $e p \to e' \pi^+ \pi^- p'$ using the CLAS detector at Jefferson Laboratory. These results are presented for the first time at photon virtualities 2.0 GeV^2 < Q^2 < 5.0 GeV^2 in the…

核实验 · 物理学 2017-08-30 E. L. Isupov , V. D. Burkert , D. S. Carman , R. W. Gothe , K. Hicks , B. S. Ishkhanov , V. I. Mokeev , the CLAS Collaboration

Nucleon Resonance Electrocouplings from the CLAS Data on Exclusive Meson Electroproduction off Protons

$\gamma_{v}NN^*$ transition helicity amplitudes (electrocouplings) of several prominent excited proton states are determined for the first time in independent analyses of $\pi^+n$, $\pi^0p$, and $\pi^+\pi^-p$ electroproduction off protons.…

核实验 · 物理学 2011-09-08 Victor I. Mokeev , Inna G. Aznauryan , Volker D. Burkert

Deep exclusive $\pi^+$ electroproduction off the proton at CLAS

The exclusive electroproduction of $\pi^+$ above the resonance region was studied using the $\rm{CEBAF}$ Large Acceptance Spectrometer ($\rm{CLAS}$) at Jefferson Laboratory by scattering a 6 GeV continuous electron beam off a hydrogen…

核实验 · 物理学 2013-01-29 K. Park , M. Guidal , R. W. Gothe , J. M. Laget , M. Garçon , K. P. Adhikari , M. Aghasyan , M. J. Amaryan , M. Anghinolfi , H. Avakian , H. Baghdasaryan , J. Ball , N. A. Baltzell , M. Battaglieri , I. Bedlinsky , R. P. Bennett , A. S. Biselli , C. Bookwalter , S. Boiarinov , W. J. Briscoe , W. K. Brooks , V. D. Burkert , D. S. Carman , A. Celentano , S. Chandavar , G. Charles , M. Contalbrigo , V. Crede , A. D'Angelo , A. Daniel , N. Dashyan , R. De Vita , E. De Sanctis , A. Deur , C. Djalali , G. E. Dodge , D. Doughty , R. Dupre , H. Egiyan , A. El Alaoui , L. El Fassi , A. Fradi , P. Eugenio , G. Fedotov , S. Fegan , J. A. Fleming , T. A. Forest , N. Gevorgyan , G. P. Gilfoyle , K. L. Giovanetti , F. X. Girod , W. Gohn , E. Golovatch , L. Graham , K. A. Griffioen , B. Guegan , L. Guo , K. Hafidi , H. Hakobyan , C. Hanretty , D. Heddle , K. Hicks , D. Ho , M. Holtrop , Y. Ilieva , D. G. Ireland , B. S. Ishkhanov , D. Jenkins , H. S. Jo , D. Keller , M. Khandaker , P. Khetarpal , A. Kim , W. Kim , F. J. Klein , S. Koirala , A. Kubarovsky , V. Kubarovsky , S. E. Kuhn , S. V. Kuleshov , K. Livingston , H. Y. Lu , I. J. D. MacGregor , Y. Mao , N. Markov , D. Martinez , M. Mayer , B. McKinnon , C. A. Meyer , T. Mineeva , M. Mirazita , V. Mokeev , H. Moutarde , E. Munevar , C. Munoz Camacho , P. Nadel-Turonski , C. S. Nepali , S. Niccolai , G. Niculescu , I. Niculescu , M. Osipenko , A. I. Ostrovidov , L. L. Pappalardo , R. Paremuzyan , S. Park , E. Pasyuk , S. Anefalos Pereira , E. Phelps , S. Pisano , O. Pogorelko , S. Pozdniakov , J. W. Price , S. Procureur , D. Protopopescu , A. J. R. Puckett , B. A. Raue , G. Ricco , D. Rimal , M. Ripani , G. Rosner , P. Rossi , F. Sabatie , M. S. Saini , C. Salgado , D. Schott , R. A. Schumacher , E. Seder , H. Seraydaryan , Y. G. Sharabian , E. S. Smith , G. D. Smith , D. I. Sober , D. Sokhan , S. S. Stepanyan , P. Stoler , I. I. Strakovsky , S. Strauch , M. Taiuti , W. Tang , C. E. Taylor , Ye Tian , S. Tkachenko , A. Trivedi , M. Ungaro , B . Vernarsky , H. Voskanyan , E. Voutier , N. K. Walford , D. P. Watts , L. B. Weinstein , D. P. Weygand , M. H. Wood , N. Zachariou , J. Zhang , Z. W. Zhao , I. Zonta

Exclusive $\pi^{-}$ Electroproduction off the Neutron in Deuterium in the Resonance Region

New results for the exclusive and quasi-free cross sections off neutrons bound in deuterium ${\gamma}_vn(p) \rightarrow p{\pi}^{-} (p)$ are presented over a wide final state hadron angle range with a kinematic coverage of the invariant mass…

核实验 · 物理学 2023-01-18 Y. Tian , R. W. Gothe , V. I. Mokeev , G. Hollis , M. J. Amaryan , W. R. Armstrong , H. Atac , H. Avakian , L. Barion , M. Battaglieri , I. Bedlinskiy , B. Benkel , F. Benmokhtar , A. Bianconi , L. Biondo , A. Biselli , F. Bossù , S. Boiarinov , M. Bondì , K. T. Brinkmann , W. J. Briscoe , S. Bueltmann , D. Bulumulla , V. D. Burkert , R. Capobianco , D. S. Carman , J. C. Carvajal , A. Celentano , V. Chesnokov , T. Chetry , G. Ciullo , G. Clash , P. L. Cole , M. Contalbrigo , G. Costantini , A. D'Angelo , N. Dashyan , R. De Vita , M. Defurne , A. Deur , S. Diehl , C. Djalali , R. Dupre , H. Egiyan , A. El Alaoui , L. El Fassi , L. Elouadrhiri , P. Eugenio , S. Fegan , A. Filippi , G. Gavalian , G. P. Gilfoyle , F. X. Girod , A. A. Golubenko , G. Gosta , K. Griffioen , M. Guidal , H. Hakobyan , M. Hattawy , T. B. Hayward , A. Hobart , M. Holtrop , Y. Ilieva , D. G. Ireland , E. L. Isupov , D. Jenkins , H. S. Jo , K. Joo , S. Joosten , D. Keller , A. Khanal , M. Khandaker , A. Kim , W. Kim , F. J. Klein , A. Kripko , V. Kubarovsky , V. Lagerquist , L. Lanza , M. Leali , P. Lenisa , K. Livingston , I. . J . D. MacGregor , D. Marchand , L. Marsicano , V. Mascagna , B. McKinnon , S. Migliorati , T. Mineeva , M. Mirazita , C. Munoz Camacho , P. Nadel-Turonski , P. Naidoo , K. Neupane , J. Newton , S. Niccolai , M. Nicol , G. Niculescu , M. Osipenko , P. Pandey , M. Paolone , L. L. Pappalardo , R. Paremuzyan , K. Park , E. Pasyuk , S. J. Paul , W. Phelps , N. Pilleux , D. Počanić , O. Pogorelko , J. Poudel , J. W. Price , Y. Prok , T. Reed , M. Ripani , J. Ritman , A. Rizzo , G. Rosner , F. Sabatié , C. Salgado , S. Schadmand , A. Schmidt , R. A. Schumacher , E. V. Shirokov , U. Shrestha , P. Simmerling , D. Sokhan , N. Sparveris , S. Stepanyan , I. I. Strakovsky , S. Strauch , R. Tyson , M. Ungaro , L. Venturelli , H. Voskanyan , E. Voutier , D. P. Watts , K. Wei , X. Wei , M. H. Wood , B. Yale , N. Zachariou , J. Zhang

Near threshold electroproduction of the omega meson at Q2 ~ 0.5 GeV2

Electroproduction of the omega meson was investigated in the p(e,e'p)omega reaction. The measurement was performed at a 4-momentum transfer Q2 ~ 0.5 GeV2. Angular distributions of the virtual photon-proton center-of-momentum cross sections…

核实验 · 物理学 2008-11-26 P. Ambrozewicz , J. Mitchell , J. Dunne , P. Markowitz , C. J. Martoff , J. Reinhold , B. Zeidman

Nucleon Resonance Electrocouplings from the CLAS Meson Electroproduction Data

Transition helicity amplitudes $\gamma_{v}NN^*$ (electrocouplings) were determined for prominent excited proton states with masses below 1.8 GeV in independent analyses of major meson electroproduction channels: $\pi^{+}n$, $\pi^0p$ and…

核实验 · 物理学 2015-05-30 I. G. Aznauryan , V. D. Burkert , V. I. Mokeev

Single pi+ Electroproduction on the Proton in the First and Second Resonance Regions at 0.25GeV^2 < Q^2 < 0.65GeV^2 Using CLAS

The ep -> e'pi^+n reaction was studied in the first and second nucleon resonance regions in the 0.25 GeV^2 < Q^2 < 0.65 GeV^2 range using the CLAS detector at Thomas Jefferson National Accelerator Facility. For the first time the absolute…

核实验 · 物理学 2010-04-06 H. Egiyan , I. G. Aznauryan , V. D. Burkert , K. A. Griffioen , K. Joo , R. Minehart , L. C. Smith , the CLAS Collaboration

Elastic J/Psi Production at HERA

Cross sections for elastic production of J/Psi mesons in photoproduction and electroproduction are measured in electron proton collisions at HERA using an integrated luminosity of 55 pb^{-1}. Results are presented for photon virtualities…

高能物理 - 实验 · 物理学 2012-08-27 H1 Collaboration

Electroproduction of $\phi(1020)$ mesons at $1.4\leq Q^2\leq$ GeV$^2$ measured with the CLAS spectrometer

Electroproduction of exclusive $\phi$ vector mesons has been studied with the CLAS detector in the kinematical range $1.4\leq Q^2\leq 3.8$ GeV$^{2}$, $0.0\leq t^{\prime}\leq 3.6$ GeV$^{2}$, and $2.0\leq W\leq 3.0$ GeV. The scaling exponent…

核实验 · 物理学 2010-04-06 J. P. Santoro , E. S. Smith , M. Garcon , M. Guidal , J. M. Laget , C. Weiss

Separated cross sections in \pi^0 electroproduction at threshold at Q^2 = 0.05 GeV^2/c^2

The differential cross sections \sigma_0=\sigma_T+\epsilon \sigma_L, \sigma_{LT}, and \sigma_{TT} of \pi^0 electroproduction from the proton were measured from threshold up to an additional center of mass energy of 40 MeV, at a value of the…

核实验 · 物理学 2008-11-26 M. Weis , P. Bartsch , D. Baumann , J. Bermuth , A. M. Bernstein , K. Bohinc , R. Böhm , M. Ding , M. O. Distler , I. Ewald , J. M. Friedrich , J. Friedrich , M. Kahrau , M. Kohl , K. W. Krygier , A. Liesenfeld , H. Merkel , P. Merle , U. Müller , R. Neuhausen , M. M. Pavan , Th. Pospischil , M. Potokar , G. Rosner , H. Schmieden , M. Seimetz , S. Širca , A. Wagner , Th. Walcher