Ratios of helicity amplitudes for exclusive ρ0 electroproduction on transversely polarized protons

Airapetian, A.; Akopov, N.; Akopov, Z.; Aschenauer, E. C.; Augustyniak, W.; Belostotski, S.; Blok, H. P.; Borissov, A.; Bryzgalov, V.; Capitani, G. P.; Ciullo, G.; Contalbrigo, M.; Deconinck, W.; De Leo, R.; De Sanctis, E.; Düren, M.; Elbakian, G.; Ellinghaus, F.; Felawka, L.; Frullani, S.; Garibaldi, F.; Gavrilov, G.; Gharibyan, V.; Goloskokov, S. V.; Holler, Y.; Ivanilov, A.; Jackson, H. E.; Joosten, S.; Kaiser, R.; Karyan, G.; Kisselev, A.; Korotkov, V.; Kozlov, V.; Kravchenko, P.; Kroll, P.; Lagamba, L.; Lapikás, L.; Lehmann, I.; Lenisa, P.; Lorenzon, W.; Manaenkov, S. I.; Marianski, B.; Marukyan, H.; Miyachi, Y.; Movsisyan, A.; Muccifora, V.; Nass, A.; Nowak, W. -D.; Pappalardo, L. L.; Petrosyan, A.; Reimer, P. E.; Reolon, A. R.; Riedl, C.; Rith, K.; Rosner, G.; Rostomyan, A.; Ryckbosch, D.; Salomatin, Y.; Schäfer, A.; Schnell, G.; Seitz, B.; Shibata, T. -A.; Shutov, V.; Statera, M.; Terkulov, A.; Truty, R.; Trzcinski, A.; Tytgat, M.; Van Haarlem, Y.; Van Hulse, C.; Veretennikov, D.; Vikhrov, V.; Vilardi, I.; Yaschenko, S.; Zihlmann, B.; Zupranski, P.

doi:10.1140/epjc/s10052-017-4899-1

Title: Ratios of helicity amplitudes for exclusive ρ⁰ electroproduction on transversely polarized protons

Journal Article · Thu Jun 08 00:00:00 EDT 2017 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-017-4899-1· OSTI ID:1395956

Airapetian, A.; Akopov, N.; Akopov, Z.; Aschenauer, E. C.; Augustyniak, W.; Belostotski, S.; Blok, H. P.; Borissov, A.; Bryzgalov, V.; Capitani, G. P.; Ciullo, G.; Contalbrigo, M.; Deconinck, W.; De Leo, R.; De Sanctis, E.; Düren, M.; Elbakian, G.; Ellinghaus, F.; Felawka, L.; Frullani, S. more »

Exclusive ρ⁰-meson electroproduction is studied by the HERMES experiment, using the 27.6 GeV longitudinally polarized electron/positron beam of HERA and a transversely polarized hydrogen target, in the kinematic region 1.0 GeV² < Q² < 7.0 GeV², 3.0 GeV < W < 6.3 GeV, and –t' < 0.4 GeV². Using an unbinned maximum-likelihood method, 25 parameters are extracted. These determine the real and imaginary parts of the ratios of several helicity amplitudes describing ρ⁰-meson production by a virtual photon. The denominator of those ratios is the dominant amplitude, the nucleon-helicity-non-flip amplitude F_01/201/2, which describes the production of a longitudinal ρ⁰-meson by a longitudinal virtual photon. The ratios of nucleon-helicity-non-flip amplitudes are found to be in good agreement with those from the previous HERMES analysis. The transverse target polarization allows for the first time the extraction of ratios of a number of nucleon-helicity-flip amplitudes to F_01/201/2. Results obtained in a handbag approach based on generalized parton distributions taking into account the contribution from pion exchange are found to be in good agreement with these ratios. Within the model, the data favor a positive sign for the π - ρ transition form factor. By also exploiting the longitudinal beam polarization, a total of 71 ρ⁰ spin-density matrix elements is determined from the extracted 25 parameters, in contrast to only 53 elements as directly determined in earlier analyses.

View Accepted Manuscript (DOE)

Cite

Export

Save

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

Sponsoring Organization:: USDOE

Contributing Organization:: The HERMES Collaboration

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1395956

Journal Information:: European Physical Journal. C, Particles and Fields, Vol. 77, Issue 6; ISSN 1434-6044

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 8 works

Citation information provided by
Web of Science

References (65)

The HERMES dual-radiator ring imaging Cherenkov detector Akopov, N.; Aschenauer, E. C.; Bailey, K. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 479, Issue 2-3 https://doi.org/10.1016/S0168-9002(01)00932-9	journal	March 2002
Transversity in exclusive vector-meson leptoproduction Goloskokov, S. V.; Kroll, P. The European Physical Journal C, Vol. 74, Issue 2 https://doi.org/10.1140/epjc/s10052-014-2725-6	journal	February 2014
The HERMES polarized hydrogen and deuterium gas target in the HERA electron storage ring Airapetian, A.; Akopov, N.; Akopov, Z. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 540, Issue 1 https://doi.org/10.1016/j.nima.2004.11.020	journal	March 2005
The hadronic properties of the photon in high-energy interactions Bauer, T. H.; Spital, R. D.; Yennie, D. R. Reviews of Modern Physics, Vol. 50, Issue 2 https://doi.org/10.1103/RevModPhys.50.261	journal	April 1978
The longitudinal cross section of vector meson electroproduction Goloskokov, S. V.; Kroll, P. The European Physical Journal C, Vol. 50, Issue 4 https://doi.org/10.1140/epjc/s10052-007-0228-4	journal	March 2007
Ratios of helicity amplitudes for exclusive ρ 0 electroproduction Airapetian, A.; Akopov, N.; Akopov, Z. The European Physical Journal C, Vol. 71, Issue 4 https://doi.org/10.1140/epjc/s10052-011-1609-2	journal	April 2011
Deeply virtual Compton scattering Ji, Xiangdong Physical Review D, Vol. 55, Issue 11 https://doi.org/10.1103/PhysRevD.55.7114	journal	June 1997
The pion pole in hard exclusive vector-meson leptoproduction Goloskokov, S. V.; Kroll, P. The European Physical Journal A, Vol. 50, Issue 9 https://doi.org/10.1140/epja/i2014-14146-2	journal	September 2014
Nucleon form factors from generalized parton distributions Guidal, M.; Polyakov, M. V.; Radyushkin, A. V. Physical Review D, Vol. 72, Issue 5 https://doi.org/10.1103/PhysRevD.72.054013	journal	September 2005
Spin density matrix elements in exclusive $$\omega $$ ω electroproduction on $$^1$$ 1 H and $$^2$$ 2 H targets at 27.5 GeV beam energy Airapetian, A.; Akopov, N.; Akopov, Z. The European Physical Journal C, Vol. 74, Issue 11 https://doi.org/10.1140/epjc/s10052-014-3110-1	journal	November 2014
High-energy-physics event generation with Pythia 6.1 Sjöstrand, Torbjörn; Edén, Patrik; Friberg, Christer Computer Physics Communications, Vol. 135, Issue 2 https://doi.org/10.1016/S0010-4655(00)00236-8	journal	April 2001
Measurement of the reaction in deep inelastic e+p scattering at HERA Derrick, M.; Krakauer, D.; Magill, S. Physics Letters B, Vol. 380, Issue 1-2 https://doi.org/10.1016/0370-2693(96)00603-X	journal	July 1996
The HERMES Spectrometer Ackerstaff, K.; Airapetian, A.; Akopov, N. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 417, Issue 2-3 https://doi.org/10.1016/S0168-9002(98)00769-4	journal	November 1998
Vector meson production by inelastic scattering of polarized electrons off polarized nucleons Fraas, H. Annals of Physics, Vol. 87, Issue 2 https://doi.org/10.1016/0003-4916(74)90042-6	journal	October 1974
Gauge-Invariant Decomposition of Nucleon Spin Ji, Xiangdong Physical Review Letters, Vol. 78, Issue 4 https://doi.org/10.1103/PhysRevLett.78.610	journal	January 1997
Factorization for hard exclusive electroproduction of mesons in QCD Collins, John C.; Frankfurt, Leonid; Strikman, Mark Physical Review D, Vol. 56, Issue 5 https://doi.org/10.1103/PhysRevD.56.2982	journal	September 1997
Diffractive electroproduction of ρ and ϕ mesons at HERA Aaron, F. D.; Aldaya Martin, M.; Alexa, C. Journal of High Energy Physics, Vol. 2010, Issue 5 https://doi.org/10.1007/JHEP05(2010)032	journal	May 2010
Hard elastic scattering in QCD: Leading behavior Botts, James; Sterman, George Nuclear Physics B, Vol. 325, Issue 1 https://doi.org/10.1016/0550-3213(89)90372-6	journal	October 1989
The role of the quark and gluon GPDs in hard vector-meson electroproduction Goloskokov, S. V.; Kroll, P. The European Physical Journal C, Vol. 53, Issue 3 https://doi.org/10.1140/epjc/s10052-007-0466-5	journal	November 2007
A simple formulation of high-energy exchange models in terms of direct-channel amplitudes Cohen-Tannoudji, G.; Salin, Ph.; Morel, A. Il Nuovo Cimento A, Vol. 55, Issue 3 https://doi.org/10.1007/BF02857563	journal	June 1968
Rho production by virtual photons Joos, P.; Ladage, A.; Meyer, H. Nuclear Physics B, Vol. 113, Issue 1 https://doi.org/10.1016/0550-3213(76)90455-7	journal	October 1976
Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD Müller, D.; Robaschik, D.; Geyer, B. Fortschritte der Physik/Progress of Physics, Vol. 42, Issue 2 https://doi.org/10.1002/prop.2190420202	journal	January 1994
Vector meson production from a polarized nucleon Diehl, Markus Journal of High Energy Physics, Vol. 2007, Issue 09 https://doi.org/10.1088/1126-6708/2007/09/064	journal	September 2007
Exclusive <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>ρ</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math> electroproduction on transversely polarized protons Airapetian, A.; Akopov, N.; Akopov, Z. Physics Letters B, Vol. 679, Issue 2 https://doi.org/10.1016/j.physletb.2009.07.023	journal	August 2009
Regge phenomenology Irving, A. C.; Worden, R. P. Physics Reports, Vol. 34, Issue 3 https://doi.org/10.1016/0370-1573(77)90010-2	journal	December 1977
Measurement of elastic electroproduction of mesons at HERA Adloff, C.; Andreev, V.; Andrieu, B. Physics Letters B, Vol. 483, Issue 4 https://doi.org/10.1016/S0370-2693(00)00613-4	journal	June 2000
The HERA polarimeter and the first observation of electron spin polarization at HERA Barber, D. P.; Bremer, H. -D.; Böge, M. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 329, Issue 1-2 https://doi.org/10.1016/0168-9002(93)90924-7	journal	May 1993
How to analyse vector-meson production in inelastic lepton scattering Schilling, K.; Wolf, G. Nuclear Physics B, Vol. 61 https://doi.org/10.1016/0550-3213(73)90371-4	journal	September 1973
Hard exclusive reactions and the structure of hadrons Goeke, K.; Polyakov, M. V.; Vanderhaeghen, M. Progress in Particle and Nuclear Physics, Vol. 47, Issue 2 https://doi.org/10.1016/S0146-6410(01)00158-2	journal	January 2001
Generalized parton distributions Diehl, M. Physics Reports, Vol. 388, Issue 2-4 https://doi.org/10.1016/j.physrep.2003.08.002	journal	December 2003
Hard Electroproduction of Photons and Mesons on the Nucleon Vanderhaeghen, M.; Guichon, P. A. M.; Guidal, M. Physical Review Letters, Vol. 80, Issue 23 https://doi.org/10.1103/PhysRevLett.80.5064	journal	June 1998
An interpretation of two-body hadron reactions Kane, G. L.; Seidl, A. Reviews of Modern Physics, Vol. 48, Issue 2 https://doi.org/10.1103/RevModPhys.48.309	journal	April 1976
Spin density matrix elements in exclusive ρ 0 electroproduction on 1H and 2H targets at 27.5 GeV beam energy Airapetian, A.; Akopov, N.; Akopov, Z. The European Physical Journal C, Vol. 62, Issue 4 https://doi.org/10.1140/epjc/s10052-009-1082-3	journal	July 2009
The Longitudinal Polarimeter at HERA Beckmann, M.; Borissov, A.; Brauksiepe, S. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 479, Issue 2-3 https://doi.org/10.1016/S0168-9002(01)00901-9	journal	March 2002
Application of Kalman filtering to track and vertex fitting Frühwirth, R. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 262, Issue 2-3 https://doi.org/10.1016/0168-9002(87)90887-4	journal	December 1987
Elastic electroproduction of ϱ and mesons at large Q2 at HERA Aid, S.; Andreev, V.; Andrieu, B. Nuclear Physics B, Vol. 468, Issue 1-2 https://doi.org/10.1016/0550-3213(96)00192-7	journal	May 1996
Cross sections for hard exclusive electroproduction of <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math> mesons on a hydrogen target Airapetian, A.; Akopov, N.; Akopov, Z. Physics Letters B, Vol. 659, Issue 3 https://doi.org/10.1016/j.physletb.2007.11.079	journal	January 2008
Diffractive vector meson production at HERA: From soft to hard QCD Ivanov, I. P.; Nikolaev, N. N.; Savin, A. A. Physics of Particles and Nuclei, Vol. 37, Issue 1 https://doi.org/10.1134/S1063779606010011	journal	January 2006
Double-spin asymmetry in the cross section for exclusive ρ0 production in lepton–proton scattering Airapetian, A.; Akopov, N.; Akopov, Z. Physics Letters B, Vol. 513, Issue 3-4 https://doi.org/10.1016/S0370-2693(01)00639-6	journal	August 2001
Unraveling hadron structure with generalized parton distributions Belitsky, A. V.; Radyushkin, A. V. Physics Reports, Vol. 418, Issue 1-6 https://doi.org/10.1016/j.physrep.2005.06.002	journal	October 2005
Exclusive ρ0 production in deep inelastic scattering at HERA PMC Physics A, Vol. 1 https://doi.org/10.1186/1754-0410-1-6	journal	January 2007
Exclusive electroproduction of Breitweg et al., J. The European Physical Journal C, Vol. 6, Issue 4 https://doi.org/10.1007/s100520050369	journal	January 1999
Elastic electroproduction of Adloff et al., C. The European Physical Journal C, Vol. 13, Issue 3 https://doi.org/10.1007/s100520050703	journal	January 2000
Exclusive leptoproduction of $\rho^0$ mesons from hydrogen at intermediate virtual photon energies Airapetian et al., A. The European Physical Journal C, Vol. 17, Issue 3 https://doi.org/10.1007/s100520000483	journal	November 2000
Double-spin asymmetries in the cross section of $\rho^0$ and $\phi$ production at intermediate energies et al., A. Airapetian The European Physical Journal C, Vol. 29, Issue 2 https://doi.org/10.1140/epjc/s2003-01232-3	journal	July 2003
Deeply virtual Compton scattering Marukyan, Hrachya International Journal of Modern Physics A, Vol. 30, Issue 32 https://doi.org/10.1142/s0217751x15300574	journal	November 2015
Gauge-invariant decomposition of nucleon spin Wakamatsu, Masashi Journal of Physics: Conference Series, Vol. 295 https://doi.org/10.1088/1742-6596/295/1/012038	journal	May 2011
Transversity in exclusive vector-meson leptoproduction Goloskokov, S. V.; Kroll, P. Universität Regensburg https://doi.org/10.5283/epub.32294	text	January 2013
Generalized Parton Distributions Avakian, H. Proceedings of the 17th International Spin Physics Symposium, AIP Conference Proceedings https://doi.org/10.1063/1.2750745	conference	January 2007
Diffractive electroproduction of ρ and ϕ mesons at HERA Collaboration, H1; Egli, S.; Hildebrandt, M. Springer https://doi.org/10.5167/uzh-42695	text	January 2010
Transversity in exclusive vector-meson leptoproduction Goloskokov, S. V.; Kroll, P. Universität Regensburg https://doi.org/10.5283/epub.32297	text	January 2014
Vector meson production from a polarized nucleon Diehl, M. arXiv https://doi.org/10.48550/arxiv.0704.1565	text	January 2007
The role of the quark and gluon GPDs in hard vector-meson electroproduction Goloskokov, S. V.; Kroll, P. arXiv https://doi.org/10.48550/arxiv.0708.3569	text	January 2007
Spin Density Matrix Elements in Exclusive rho^0 Electroproduction on 1H and 2H Targets at 27.5 GeV Beam Energy Collaboration, Hermes; Airapetian, A. arXiv https://doi.org/10.48550/arxiv.0901.0701	text	January 2009
Diffractive Electroproduction of rho and phi Mesons at HERA Collaboration, The H1 arXiv https://doi.org/10.48550/arxiv.0910.5831	text	January 2009
The pion pole in hard exclusive vector-meson leptoproduction Goloskokov, S. V.; Kroll, P. arXiv https://doi.org/10.48550/arxiv.1407.1141	text	January 2014
Measurement of elastic electroproduction of phi mesons at HERA Collaboration, H1; Adloff, C. arXiv https://doi.org/10.48550/arxiv.hep-ex/0005010	text	January 2000
Double-Spin Asymmetry in the Cross Section for Exclusive rho^0 Production in Lepton-Proton Scattering Collaboration, Hermes; Airapetian, A. arXiv https://doi.org/10.48550/arxiv.hep-ex/0102037	text	January 2001
The HERMES Spectrometer Ackerstaff, K. arXiv https://doi.org/10.48550/arxiv.hep-ex/9806008	text	January 1998
High-Energy-Physics Event Generation with PYTHIA 6.1 Sjöstrand, Torbjörn; Edén, Patrik; Friberg, Christer arXiv https://doi.org/10.48550/arxiv.hep-ph/0010017	text	January 2000
Hard Exclusive Reactions and the Structure of Hadrons Goeke, K.; Polyakov, M. V.; Vanderhaeghen, M. arXiv https://doi.org/10.48550/arxiv.hep-ph/0106012	text	January 2001
Generalized Parton Distributions Diehl, M. arXiv https://doi.org/10.48550/arxiv.hep-ph/0307382	text	January 2003
Unraveling hadron structure with generalized parton distributions Belitsky, A. V.; Radyushkin, A. V. arXiv https://doi.org/10.48550/arxiv.hep-ph/0504030	text	January 2005
Factorization for hard exclusive electroproduction of mesons in QCD Collins, John C.; Frankfurt, Leonid; Strikman, Mark arXiv https://doi.org/10.48550/arxiv.hep-ph/9611433	text	January 1996
The Longitudinal Polarimeter at HERA Beckmann, M.; Borissov, A.; Brauksiepe, S. arXiv https://doi.org/10.48550/arxiv.physics/0009047	text	January 2000

Similar Records

Single and Double Spin Asymmetries for Deeply Virtual Exclusive π⁰ Production on Longitudinally Polarized Proton Target with CLAS

Thesis/Dissertation · Sun Dec 01 00:00:00 EST 2013 · OSTI ID:1395956

Kim, Andrew

Transverse-Target-Spin Asymmetry in Exclusive {omega}-Meson Electroproduction

Journal Article · Thu Dec 17 00:00:00 EST 2015 · European Physical Journal. C, Particles and Fields · OSTI ID:1395956

Airapetian, A.; Akopov, N.; Akopov, Z.; +9 more

Experimental investigation of ρ{sup 0} photoproduction on the pion in the H1 experiment

Journal Article · Thu Dec 15 00:00:00 EST 2016 · Physics of Atomic Nuclei · OSTI ID:1395956

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Title: Ratios of helicity amplitudes for exclusive ρ0 electroproduction on transversely polarized protons

Citation Formats

References (65)

Similar Records

Related Subjects

Title: Ratios of helicity amplitudes for exclusive ρ⁰ electroproduction on transversely polarized protons