Measurement of target and double-spin asymmetries for the e→p→→eπ+(n) reaction in the nucleon resonance region at low Q2

Zheng, X.; Adhikari, K. P.; Bosted, P.; Deur, A.; Drozdov, V.; El Fassi, L.; Kang, Hyekoo; Kovacs, K.; Kuhn, S.; Long, E.; Phillips, S. K.; Ripani, M.; Slifer, K.; Smith, L. C.; Adikaram, D.; Akbar, Z.; Amaryan, M. J.; Anefalos Pereira, S.; Asryan, G.; Avakian, H.; Badui, R. A.; Ball, J.; Baltzell, N. A.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Biselli, A. S.; Briscoe, W. J.; Bültmann, S.; Burkert, V. D.; Carman, D. S.; Celentano, A.; Chandavar, S.; Charles, G.; Chen, J. -P.; Chetry, T.; Choi, Seonho; Ciullo, G.; Clark, L.; Colaneri, L.; Cole, P. L.; Compton, N.; Contalbrigo, M.; Crede, V.; D'Angelo, A.; Dashyan, N.; De Vita, R.; De Sanctis, E.; Djalali, C.; Dodge, G. E.; Dupre, R.; Egiyan, H.; El Alaoui, A.; Elouadrhiri, L.; Eugenio, P.; Fanchini, E.; Fedotov, G.; Fersch, R.; Filippi, A.; Fleming, J. A.; Gevorgyan, N.; Ghandilyan, Y.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Gleason, C.; Golovach, E.; Gothe, R. W.; Griffioen, K. A.; Guidal, M.; Guler, N.; Guo, L.; Hanretty, C.; Harrison, N.; Hattawy, M.; Hicks, K.; Holtrop, M.; Hughes, S. M.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Jenkins, D.; Jiang, H.; Jo, H. S.; Joosten, S.; Keller, D.; Khachatryan, G.; Khandaker, M.; Kim, A.; Kim, W.; Klein, F. J.; Kubarovsky, V.; Lanza, L.; Lenisa, P.; Livingston, K.; MacGregor, I. J.  D.; Markov, N.; McKinnon, B.; Mirazita, M.; Mokeev, V.; Movsisyan, A.; Munevar, E.; Munoz Camacho, C.; Murdoch, G.; Nadel-Turonski, P.; Net, L. A.; Ni, A.; Niccolai, S.; Niculescu, G.; Niculescu, I.; Osipenko, M.; Ostrovidov, A. I.; Paolone, M.; Paremuzyan, R.; Park, K.; Pasyuk, E.; Peng, P.; Pisano, S.; Pogorelko, O.; Price, J. W.; Puckett, A. J.  R.; Raue, B. A.; Rizzo, A.; Rosner, G.; Rossi, P.; Roy, P.; Sabatié, F.; Salgado, C.; Schumacher, R. A.; Sharabian, Y. G.; Skorodumina, Iu.; Smith, G. D.; Sokhan, D.; Sparveris, N.; Stankovic, I.; Strakovsky, I. I.; Strauch, S.; Taiuti, M.; Tian, Ye; Ungaro, M.; Voskanyan, H.; Voutier, E.; Walford, N. K.; Watts, D. P.; Wei, X.; Weinstein, L. B.; Wood, M. H.; Zachariou, N.; Zhang, J.; Zonta, I.

doi:10.1103/PhysRevC.94.045206

Title: Measurement of target and double-spin asymmetries for the $\vec{e} \vec{p} \to e π^{+} (n)$ reaction in the nucleon resonance region at low $Q^{2}$

Journal Article · Sat Oct 01 00:00:00 EDT 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.94.045206· OSTI ID:1371558

Zheng, X.; Adhikari, K. P.; Bosted, P.; Deur, A.; Drozdov, V.; El Fassi, L.; Kang, Hyekoo; Kovacs, K.; Kuhn, S.; Long, E.; Phillips, S. K.; Ripani, M.; Slifer, K.; Smith, L. C.; Adikaram, D.; Akbar, Z.; Amaryan, M. J.; Anefalos Pereira, S.; Asryan, G.; Avakian, H. more »

We report measurements of target- and double-spin asymmetries for the exclusive channel $\vec{e} \vec{p} \to e π^{+} (n)$ in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extracted from data obtained using a longitudinally polarized NH3 target and a longitudinally polarized electron beam with energies 1.1, 1.3, 2.0, 2.3, and 3.0 GeV. The new results are consistent with previous CLAS publications but are extended to a low Q² range from 0.0065 to 0.35 (GeV/c)². The Q² access was made possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low as 6 degrees. These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis prediction from SAID, and the dynamic model DMT. In many kinematic regions our results, in particular results on the target asymmetry, help to constrain the polarization-dependent components of these models.

Cite

Export

Save

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science - Office of Nuclear Physics

Contributing Organization:: CLAS Collaboration

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1371558

Journal Information:: Physical Review C, Vol. 94, Issue 4; ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

References (36)

Lattice QCD: Concepts, Techniques and Some Results Hoelbling, Ch. Acta Physica Polonica B, Vol. 45, Issue 12 https://doi.org/10.5506/APhysPolB.45.2143	journal	January 2014
Helicity and isospin asymmetries in the electroproduction of nucleon resonances Warns, M.; Pfeil, W.; Rollnik, H. Physical Review D, Vol. 42, Issue 7 https://doi.org/10.1103/PhysRevD.42.2215	journal	October 1990
Unitary isobar model --MAID2007 Drechsel, D.; Kamalov, S. S.; Tiator, L. The European Physical Journal A, Vol. 34, Issue 1 https://doi.org/10.1140/epja/i2007-10490-6	journal	October 2007
Photo- and electroproduction of nonstrange baryon resonances in the relativized quark model Capstick, Simon Physical Review D, Vol. 46, Issue 7 https://doi.org/10.1103/PhysRevD.46.2864	journal	October 1992
Measurement of the polarized structure function $σ_{L T^{'}}$ for $p (\vec{e}, e^{'} π^{+}) n$ in the $Δ (1232)$ resonance region Joo, K.; Smith, L. C.; Aznauryan, I. G. Physical Review C, Vol. 70, Issue 4 https://doi.org/10.1103/PhysRevC.70.042201	journal	October 2004
The CEBAF large acceptance spectrometer (CLAS) Mecking, B. A.; Adams, G.; Ahmad, S. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 503, Issue 3 https://doi.org/10.1016/S0168-9002(03)01001-5	journal	May 2003
Review of Particle Physics Beringer, J.; Arguin, J. -F.; Barnett, R. M. Physical Review D, Vol. 86, Issue 1 https://doi.org/10.1103/PhysRevD.86.010001	journal	July 2012
Cross sections and beam asymmetries for $\vec{e} p \to e n π^{+}$ in the nucleon resonance region for $1.7 ⩽ Q^{2} ⩽ 4.5$ GeV $^{2}$ Park, K.; Burkert, V. D.; Kim, W. Physical Review C, Vol. 77, Issue 1 https://doi.org/10.1103/PhysRevC.77.015208	journal	January 2008
Electroexcitation of nucleon resonances Aznauryan, I. G.; Burkert, V. D. Progress in Particle and Nuclear Physics, Vol. 67, Issue 1 https://doi.org/10.1016/j.ppnp.2011.08.001	journal	January 2012
The CLAS Cherenkov detector Adams, G.; Burkert, V.; Carl, R. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 465, Issue 2-3 https://doi.org/10.1016/S0168-9002(00)01313-9	journal	June 2001
Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region Zheng, X.; Aniol, K.; Armstrong, D. S. Physical Review C, Vol. 70, Issue 6 https://doi.org/10.1103/PhysRevC.70.065207	journal	December 2004
Double spin asymmetry in π+ electroproduction with CLAS De Vita, R. Nuclear Physics A, Vol. 699, Issue 1-2 https://doi.org/10.1016/S0375-9474(01)01479-8	journal	February 2002
QED radiative corrections in processes of exclusive pion electroproduction Afanasev, A.; Akushevich, I.; Burkert, V. Physical Review D, Vol. 66, Issue 7 https://doi.org/10.1103/PhysRevD.66.074004	journal	October 2002
Generalized Drell–Hearn–Gerasimov sum rule Ji, X.; Kao, C. -W.; Osborne, J. Nuclear Physics A, Vol. 684, Issue 1-4 https://doi.org/10.1016/S0375-9474(01)00383-9	journal	March 2001
Measurements of the proton and deuteron spin structure functions $g_{1}$ and $g_{2}$ Abe, K.; Akagi, T.; Anthony, P. L. Physical Review D, Vol. 58, Issue 11 https://doi.org/10.1103/PhysRevD.58.112003	journal	October 1998
Pion Cloud and the $Q^{2}$ Dependence of $γ^{*} N \leftrightarrow Δ$ Transition Form Factors Kamalov, S. S.; Nan Yang, Shin Physical Review Letters, Vol. 83, Issue 22 https://doi.org/10.1103/PhysRevLett.83.4494	journal	November 1999
First Measurement of the Helicity Asymmetry for $γ p \to p π^{0}$ in the Resonance Region Gottschall, M.; Anisovich, A. V.; Bantes, B. Physical Review Letters, Vol. 112, Issue 1 https://doi.org/10.1103/PhysRevLett.112.012003	journal	January 2014
$e \vec{p} ep π^{0}$ reaction studied in the $Δ (1232)$ mass region using polarization asymmetries Biselli, A.; Adams, G. S.; Amaryan, M. J. Physical Review C, Vol. 68, Issue 3 https://doi.org/10.1103/PhysRevC.68.035202	journal	September 2003
Corrections to nucleon spin structure asymmetries measured on nuclear polarized targets Rondon, O. A. Physical Review C, Vol. 60, Issue 3 https://doi.org/10.1103/PhysRevC.60.035201	journal	July 1999
Ultraviolet Behavior of Non-Abelian Gauge Theories Gross, David J.; Wilczek, Frank Physical Review Letters, Vol. 30, Issue 26 https://doi.org/10.1103/PhysRevLett.30.1343	journal	June 1973
Reliable Perturbative Results for Strong Interactions? Politzer, H. David Physical Review Letters, Vol. 30, Issue 26 https://doi.org/10.1103/PhysRevLett.30.1346	journal	June 1973
Precision Measurement of the Neutron Spin Asymmetry $A_{1}^{n}$ and Spin-Flavor Decomposition in the Valence Quark Region Zheng, X.; Aniol, K.; Armstrong, D. S. Physical Review Letters, Vol. 92, Issue 1 https://doi.org/10.1103/PhysRevLett.92.012004	journal	January 2004
Helicity asymmetry measurement for π0 photoproduction on the CLAS frozen spin target Schott, Diane; Briscoe, William; Strakovsky, Igor AIP Conference Proceedings https://doi.org/10.1063/1.4949399	conference	January 2016
Threshold pion electroproduction in chiral perturbation theory Bernard, V.; Kaiser, N.; Lee, T. -S. H. Physics Reports, Vol. 246, Issue 6 https://doi.org/10.1016/0370-1573(94)90088-4	journal	October 1994
Threshold neutral pion electroproduction in heavy baryon chiral perturbation theory Bernard, V.; Kaiser, N.; Meißner, Ulf-G Nuclear Physics A, Vol. 607, Issue 4 https://doi.org/10.1016/0375-9474(96)00184-4	journal	September 1996
Exact Sum Rule for Nucleon Magnetic Moments Drell, S. D.; Hearn, A. C. Physical Review Letters, Vol. 16, Issue 20 https://doi.org/10.1103/PhysRevLett.16.908	journal	May 1966
Measurement of proton and nitrogen polarization in ammonia and a test of equal spin temperature Adeva, B.; Arik, E.; Arvidson, A. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 419, Issue 1 https://doi.org/10.1016/S0168-9002(98)00916-4	journal	December 1998
Light-weight spherical mirrors for Cherenkov detectors Cisbani, E.; Colilli, S.; Crateri, R. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 496, Issue 2-3 https://doi.org/10.1016/S0168-9002(02)01747-3	journal	January 2003
Baryon resonance analysis from SAID Arndt, R. A.; Briscoe, W. J.; Paris, M. W. Chinese Physics C, Vol. 33, Issue 12 https://doi.org/10.1088/1674-1137/33/12/004	journal	December 2009
Kenneth Wilson and Lattice QCD Ukawa, Akira Journal of Statistical Physics, Vol. 160, Issue 5 https://doi.org/10.1007/s10955-015-1197-x	journal	February 2015
Helicity asymmetry E measurement for single π0 photoproduction with a frozen spin target Iwamoto, Hideko THE 8TH INTERNATIONAL WORKSHOP ON THE PHYSICS OF EXCITED NUCLEONS: NSTAR 2011, AIP Conference Proceedings https://doi.org/10.1063/1.3701229	conference	January 2012
Empirical fit to the nucleon electromagnetic form factors Bosted, P. E. Physical Review C, Vol. 51, Issue 1 https://doi.org/10.1103/PhysRevC.51.409	journal	January 1995
Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction Aznauryan, I. G.; Burkert, V. D.; Biselli, A. S. Physical Review C, Vol. 80, Issue 5 https://doi.org/10.1103/PhysRevC.80.055203	journal	November 2009
The Virginia/Basel/SLAC polarized target: operation and performance during experiment E143 at SLAC Crabb, D. G.; Day, D. B. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 356, Issue 1 https://doi.org/10.1016/0168-9002(94)01436-1	journal	March 1995
Erratum: First Measurement of the Double Spin Asymmetry in $\vec{e} \vec{p} \to e^{'} π^{+} n$ in the Resonance Region [Phys. Rev. Lett. 88, 082001 (2002)] De Vita, R.; Anghinolfi, M.; Burkert, V. D. Physical Review Letters, Vol. 88, Issue 18 https://doi.org/10.1103/PhysRevLett.88.189903	journal	April 2002
A polarized target for the CLAS detector Keith, C. D.; Anghinolfi, M.; Battaglieri, M. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 501, Issue 2-3 https://doi.org/10.1016/S0168-9002(03)00429-7	journal	April 2003

Cited By (4)

The spin structure of the nucleon Deur, Alexandre; Brodsky, Stanley J.; de Téramond, Guy F. Reports on Progress in Physics, Vol. 82, Issue 7 https://doi.org/10.1088/1361-6633/ab0b8f	journal	June 2019
The spin structure of the nucleon Kabuss, Eva-Maria Czechoslovak Journal of Physics, Vol. 55, Issue S1 https://doi.org/10.1007/bf03031986	journal	January 2005
The spin structure of the nucleon Bass, S. D.; Thomas, A. W. Progress in Particle and Nuclear Physics, Vol. 33 https://doi.org/10.1016/0146-6410(94)90048-5	journal	January 1994
The Spin Structure of the Nucleon: Proceeding of International School of Nucleon Structure: 1st Course Frois, B.; Hughes, V. W.; de Groot, N. International School of Nucleon Structure, The Spin Structure of the Nucleon https://doi.org/10.1142/9789814529051	conference	April 2017

Similar Records

Measurement of the Vector and Tensor Asymmetries at Large Missing Momentum in Quasielastic

(\vec{e}, e^{'} p)

Electron Scattering from Deuterium

Journal Article · Mon Oct 30 00:00:00 EDT 2017 · Physical Review Letters · OSTI ID:1371558

DeGrush, A.; Maschinot, A.; Akdogan, T.; +41 more

Observation of

D^{0} - {\bar{D}}^{0}

Mixing in

e^{+} e^{-}

Collisions

Journal Article · Mon Mar 17 00:00:00 EDT 2014 · Physical Review Letters · OSTI ID:1371558

Ko, B. R.; Won, E.; Adachi, I.; +164 more

Measurement of the branching ratio of

{\bar{B}}^{0} \to D^{* +} τ^{-} {\bar{ν}}_{τ}

relative to

{\bar{B}}^{0} \to D^{* +} ℓ^{-} {\bar{ν}}_{ℓ}

decays with a semileptonic tagging method

Journal Article · Thu Oct 27 00:00:00 EDT 2016 · Physical Review D · OSTI ID:1371558

Sato, Y.; Iijima, T.; Adamczyk, K.; +179 more

Title: Measurement of target and double-spin asymmetries for the e → p → → e π + ( n ) reaction in the nucleon resonance region at low Q 2

Citation Formats

References (36)

Cited By (4)

Similar Records

Related Subjects

Title: Measurement of target and double-spin asymmetries for the $\vec{e} \vec{p} \to e π^{+} (n)$ reaction in the nucleon resonance region at low $Q^{2}$