Ratios of helicity amplitudes for exclusive ρ 0 electroproduction on transversely polarized protons
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
Gespeichert in:
| Veröffentlicht in: | The European physical journal. C, Particles and fields Particles and fields, 2017-06, Vol.77 (6), p.1-23 |
|---|---|
| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 23 |
|---|---|
| container_issue | 6 |
| container_start_page | 1 |
| container_title | The European physical journal. C, Particles and fields |
| container_volume | 77 |
| creator | 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 W-D Nowak 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 T-A Shibata Shutov, V Statera, M Terkulov, A Truty, R Trzcinski, A Tytgat, M Y Van Haarlem C Van Hulse Veretennikov, D Vikhrov, V Vilardi, I Yaschenko, S Zihlmann, B Zupranski, P |
| description | 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 |
| doi_str_mv | 10.1140/epjc/s10052-017-4899-1 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest</sourceid><recordid>TN_cdi_proquest_journals_1977788766</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1977788766</sourcerecordid><originalsourceid>FETCH-proquest_journals_19777887663</originalsourceid><addsrcrecordid>eNqNi09LAzEUxIMotP75CuWB59iXNt3snkXxLL2XkH2LWeJmm5cU681P6FcyB_EsDMwwvxkhVgoflNK4pnl0a1aIu41EZaRuu06qC7FUeqtlU-vLv6z1Qlwzj4i40dguRf9qs48McYA3Ct75fAb7PgefS08MQ0xAHy4U9ieC7y9AoEAupzin2BdXvxNU5WQnPlFiCmeYY7DJf1IPdZTjxLfiarCB6e7Xb8T989P-8UVWfizE-TDGkqaKDqozxrStaZrt_1Y_CC5Qxg</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1977788766</pqid></control><display><type>article</type><title>Ratios of helicity amplitudes for exclusive ρ 0 electroproduction on transversely polarized protons</title><source>Springer_OA刊</source><source>SpringerLink (Online service)</source><source>Directory of Open Access Journals</source><source>EZB Electronic Journals Library</source><creator>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 ; W-D Nowak ; 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 ; T-A Shibata ; Shutov, V ; Statera, M ; Terkulov, A ; Truty, R ; Trzcinski, A ; Tytgat, M ; Y Van Haarlem ; C Van Hulse ; Veretennikov, D ; Vikhrov, V ; Vilardi, I ; Yaschenko, S ; Zihlmann, B ; Zupranski, P</creator><creatorcontrib>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 ; W-D Nowak ; 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 ; T-A Shibata ; Shutov, V ; Statera, M ; Terkulov, A ; Truty, R ; Trzcinski, A ; Tytgat, M ; Y Van Haarlem ; C Van Hulse ; Veretennikov, D ; Vikhrov, V ; Vilardi, I ; Yaschenko, S ; Zihlmann, B ; Zupranski, P</creatorcontrib><description>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 F012012, 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 F012012. 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.</description><identifier>ISSN: 1434-6044</identifier><identifier>EISSN: 1434-6052</identifier><identifier>DOI: 10.1140/epjc/s10052-017-4899-1</identifier><language>eng</language><publisher>Heidelberg: Springer Nature B.V</publisher><subject>Accuracy ; Amplitudes ; Beams (radiation) ; Form factors ; Helicity ; Particle production ; Polarization ; Positron beams</subject><ispartof>The European physical journal. C, Particles and fields, 2017-06, Vol.77 (6), p.1-23</ispartof><rights>The European Physical Journal C is a copyright of Springer, (2017). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,864,27924,27925</link.rule.ids></links><search><creatorcontrib>Airapetian, A</creatorcontrib><creatorcontrib>Akopov, N</creatorcontrib><creatorcontrib>Akopov, Z</creatorcontrib><creatorcontrib>Aschenauer, E C</creatorcontrib><creatorcontrib>Augustyniak, W</creatorcontrib><creatorcontrib>Belostotski, S</creatorcontrib><creatorcontrib>Blok, H P</creatorcontrib><creatorcontrib>Borissov, A</creatorcontrib><creatorcontrib>Bryzgalov, V</creatorcontrib><creatorcontrib>Capitani, G P</creatorcontrib><creatorcontrib>Ciullo, G</creatorcontrib><creatorcontrib>Contalbrigo, M</creatorcontrib><creatorcontrib>Deconinck, W</creatorcontrib><creatorcontrib>De Leo, R</creatorcontrib><creatorcontrib>De Sanctis, E</creatorcontrib><creatorcontrib>Düren, M</creatorcontrib><creatorcontrib>Elbakian, G</creatorcontrib><creatorcontrib>Ellinghaus, F</creatorcontrib><creatorcontrib>Felawka, L</creatorcontrib><creatorcontrib>Frullani, S</creatorcontrib><creatorcontrib>Garibaldi, F</creatorcontrib><creatorcontrib>Gavrilov, G</creatorcontrib><creatorcontrib>Gharibyan, V</creatorcontrib><creatorcontrib>Goloskokov, S V</creatorcontrib><creatorcontrib>Holler, Y</creatorcontrib><creatorcontrib>Ivanilov, A</creatorcontrib><creatorcontrib>Jackson, H E</creatorcontrib><creatorcontrib>Joosten, S</creatorcontrib><creatorcontrib>Kaiser, R</creatorcontrib><creatorcontrib>Karyan, G</creatorcontrib><creatorcontrib>Kisselev, A</creatorcontrib><creatorcontrib>Korotkov, V</creatorcontrib><creatorcontrib>Kozlov, V</creatorcontrib><creatorcontrib>Kravchenko, P</creatorcontrib><creatorcontrib>Kroll, P</creatorcontrib><creatorcontrib>Lagamba, L</creatorcontrib><creatorcontrib>Lapikás, L</creatorcontrib><creatorcontrib>Lehmann, I</creatorcontrib><creatorcontrib>Lenisa, P</creatorcontrib><creatorcontrib>Lorenzon, W</creatorcontrib><creatorcontrib>Manaenkov, S I</creatorcontrib><creatorcontrib>Marianski, B</creatorcontrib><creatorcontrib>Marukyan, H</creatorcontrib><creatorcontrib>Miyachi, Y</creatorcontrib><creatorcontrib>Movsisyan, A</creatorcontrib><creatorcontrib>Muccifora, V</creatorcontrib><creatorcontrib>Nass, A</creatorcontrib><creatorcontrib>W-D Nowak</creatorcontrib><creatorcontrib>Pappalardo, L L</creatorcontrib><creatorcontrib>Petrosyan, A</creatorcontrib><creatorcontrib>Reimer, P E</creatorcontrib><creatorcontrib>Reolon, A R</creatorcontrib><creatorcontrib>Riedl, C</creatorcontrib><creatorcontrib>Rith, K</creatorcontrib><creatorcontrib>Rosner, G</creatorcontrib><creatorcontrib>Rostomyan, A</creatorcontrib><creatorcontrib>Ryckbosch, D</creatorcontrib><creatorcontrib>Salomatin, Y</creatorcontrib><creatorcontrib>Schäfer, A</creatorcontrib><creatorcontrib>Schnell, G</creatorcontrib><creatorcontrib>Seitz, B</creatorcontrib><creatorcontrib>T-A Shibata</creatorcontrib><creatorcontrib>Shutov, V</creatorcontrib><creatorcontrib>Statera, M</creatorcontrib><creatorcontrib>Terkulov, A</creatorcontrib><creatorcontrib>Truty, R</creatorcontrib><creatorcontrib>Trzcinski, A</creatorcontrib><creatorcontrib>Tytgat, M</creatorcontrib><creatorcontrib>Y Van Haarlem</creatorcontrib><creatorcontrib>C Van Hulse</creatorcontrib><creatorcontrib>Veretennikov, D</creatorcontrib><creatorcontrib>Vikhrov, V</creatorcontrib><creatorcontrib>Vilardi, I</creatorcontrib><creatorcontrib>Yaschenko, S</creatorcontrib><creatorcontrib>Zihlmann, B</creatorcontrib><creatorcontrib>Zupranski, P</creatorcontrib><title>Ratios of helicity amplitudes for exclusive ρ 0 electroproduction on transversely polarized protons</title><title>The European physical journal. C, Particles and fields</title><description>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 F012012, 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 F012012. 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.</description><subject>Accuracy</subject><subject>Amplitudes</subject><subject>Beams (radiation)</subject><subject>Form factors</subject><subject>Helicity</subject><subject>Particle production</subject><subject>Polarization</subject><subject>Positron beams</subject><issn>1434-6044</issn><issn>1434-6052</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqNi09LAzEUxIMotP75CuWB59iXNt3snkXxLL2XkH2LWeJmm5cU681P6FcyB_EsDMwwvxkhVgoflNK4pnl0a1aIu41EZaRuu06qC7FUeqtlU-vLv6z1Qlwzj4i40dguRf9qs48McYA3Ct75fAb7PgefS08MQ0xAHy4U9ieC7y9AoEAupzin2BdXvxNU5WQnPlFiCmeYY7DJf1IPdZTjxLfiarCB6e7Xb8T989P-8UVWfizE-TDGkqaKDqozxrStaZrt_1Y_CC5Qxg</recordid><startdate>20170601</startdate><enddate>20170601</enddate><creator>Airapetian, A</creator><creator>Akopov, N</creator><creator>Akopov, Z</creator><creator>Aschenauer, E C</creator><creator>Augustyniak, W</creator><creator>Belostotski, S</creator><creator>Blok, H P</creator><creator>Borissov, A</creator><creator>Bryzgalov, V</creator><creator>Capitani, G P</creator><creator>Ciullo, G</creator><creator>Contalbrigo, M</creator><creator>Deconinck, W</creator><creator>De Leo, R</creator><creator>De Sanctis, E</creator><creator>Düren, M</creator><creator>Elbakian, G</creator><creator>Ellinghaus, F</creator><creator>Felawka, L</creator><creator>Frullani, S</creator><creator>Garibaldi, F</creator><creator>Gavrilov, G</creator><creator>Gharibyan, V</creator><creator>Goloskokov, S V</creator><creator>Holler, Y</creator><creator>Ivanilov, A</creator><creator>Jackson, H E</creator><creator>Joosten, S</creator><creator>Kaiser, R</creator><creator>Karyan, G</creator><creator>Kisselev, A</creator><creator>Korotkov, V</creator><creator>Kozlov, V</creator><creator>Kravchenko, P</creator><creator>Kroll, P</creator><creator>Lagamba, L</creator><creator>Lapikás, L</creator><creator>Lehmann, I</creator><creator>Lenisa, P</creator><creator>Lorenzon, W</creator><creator>Manaenkov, S I</creator><creator>Marianski, B</creator><creator>Marukyan, H</creator><creator>Miyachi, Y</creator><creator>Movsisyan, A</creator><creator>Muccifora, V</creator><creator>Nass, A</creator><creator>W-D Nowak</creator><creator>Pappalardo, L L</creator><creator>Petrosyan, A</creator><creator>Reimer, P E</creator><creator>Reolon, A R</creator><creator>Riedl, C</creator><creator>Rith, K</creator><creator>Rosner, G</creator><creator>Rostomyan, A</creator><creator>Ryckbosch, D</creator><creator>Salomatin, Y</creator><creator>Schäfer, A</creator><creator>Schnell, G</creator><creator>Seitz, B</creator><creator>T-A Shibata</creator><creator>Shutov, V</creator><creator>Statera, M</creator><creator>Terkulov, A</creator><creator>Truty, R</creator><creator>Trzcinski, A</creator><creator>Tytgat, M</creator><creator>Y Van Haarlem</creator><creator>C Van Hulse</creator><creator>Veretennikov, D</creator><creator>Vikhrov, V</creator><creator>Vilardi, I</creator><creator>Yaschenko, S</creator><creator>Zihlmann, B</creator><creator>Zupranski, P</creator><general>Springer Nature B.V</general><scope>7U5</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>H8D</scope><scope>HCIFZ</scope><scope>L7M</scope><scope>P5Z</scope><scope>P62</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20170601</creationdate><title>Ratios of helicity amplitudes for exclusive ρ 0 electroproduction on transversely polarized protons</title><author>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 ; W-D Nowak ; 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 ; T-A Shibata ; Shutov, V ; Statera, M ; Terkulov, A ; Truty, R ; Trzcinski, A ; Tytgat, M ; Y Van Haarlem ; C Van Hulse ; Veretennikov, D ; Vikhrov, V ; Vilardi, I ; Yaschenko, S ; Zihlmann, B ; Zupranski, P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_19777887663</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Accuracy</topic><topic>Amplitudes</topic><topic>Beams (radiation)</topic><topic>Form factors</topic><topic>Helicity</topic><topic>Particle production</topic><topic>Polarization</topic><topic>Positron beams</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Airapetian, A</creatorcontrib><creatorcontrib>Akopov, N</creatorcontrib><creatorcontrib>Akopov, Z</creatorcontrib><creatorcontrib>Aschenauer, E C</creatorcontrib><creatorcontrib>Augustyniak, W</creatorcontrib><creatorcontrib>Belostotski, S</creatorcontrib><creatorcontrib>Blok, H P</creatorcontrib><creatorcontrib>Borissov, A</creatorcontrib><creatorcontrib>Bryzgalov, V</creatorcontrib><creatorcontrib>Capitani, G P</creatorcontrib><creatorcontrib>Ciullo, G</creatorcontrib><creatorcontrib>Contalbrigo, M</creatorcontrib><creatorcontrib>Deconinck, W</creatorcontrib><creatorcontrib>De Leo, R</creatorcontrib><creatorcontrib>De Sanctis, E</creatorcontrib><creatorcontrib>Düren, M</creatorcontrib><creatorcontrib>Elbakian, G</creatorcontrib><creatorcontrib>Ellinghaus, F</creatorcontrib><creatorcontrib>Felawka, L</creatorcontrib><creatorcontrib>Frullani, S</creatorcontrib><creatorcontrib>Garibaldi, F</creatorcontrib><creatorcontrib>Gavrilov, G</creatorcontrib><creatorcontrib>Gharibyan, V</creatorcontrib><creatorcontrib>Goloskokov, S V</creatorcontrib><creatorcontrib>Holler, Y</creatorcontrib><creatorcontrib>Ivanilov, A</creatorcontrib><creatorcontrib>Jackson, H E</creatorcontrib><creatorcontrib>Joosten, S</creatorcontrib><creatorcontrib>Kaiser, R</creatorcontrib><creatorcontrib>Karyan, G</creatorcontrib><creatorcontrib>Kisselev, A</creatorcontrib><creatorcontrib>Korotkov, V</creatorcontrib><creatorcontrib>Kozlov, V</creatorcontrib><creatorcontrib>Kravchenko, P</creatorcontrib><creatorcontrib>Kroll, P</creatorcontrib><creatorcontrib>Lagamba, L</creatorcontrib><creatorcontrib>Lapikás, L</creatorcontrib><creatorcontrib>Lehmann, I</creatorcontrib><creatorcontrib>Lenisa, P</creatorcontrib><creatorcontrib>Lorenzon, W</creatorcontrib><creatorcontrib>Manaenkov, S I</creatorcontrib><creatorcontrib>Marianski, B</creatorcontrib><creatorcontrib>Marukyan, H</creatorcontrib><creatorcontrib>Miyachi, Y</creatorcontrib><creatorcontrib>Movsisyan, A</creatorcontrib><creatorcontrib>Muccifora, V</creatorcontrib><creatorcontrib>Nass, A</creatorcontrib><creatorcontrib>W-D Nowak</creatorcontrib><creatorcontrib>Pappalardo, L L</creatorcontrib><creatorcontrib>Petrosyan, A</creatorcontrib><creatorcontrib>Reimer, P E</creatorcontrib><creatorcontrib>Reolon, A R</creatorcontrib><creatorcontrib>Riedl, C</creatorcontrib><creatorcontrib>Rith, K</creatorcontrib><creatorcontrib>Rosner, G</creatorcontrib><creatorcontrib>Rostomyan, A</creatorcontrib><creatorcontrib>Ryckbosch, D</creatorcontrib><creatorcontrib>Salomatin, Y</creatorcontrib><creatorcontrib>Schäfer, A</creatorcontrib><creatorcontrib>Schnell, G</creatorcontrib><creatorcontrib>Seitz, B</creatorcontrib><creatorcontrib>T-A Shibata</creatorcontrib><creatorcontrib>Shutov, V</creatorcontrib><creatorcontrib>Statera, M</creatorcontrib><creatorcontrib>Terkulov, A</creatorcontrib><creatorcontrib>Truty, R</creatorcontrib><creatorcontrib>Trzcinski, A</creatorcontrib><creatorcontrib>Tytgat, M</creatorcontrib><creatorcontrib>Y Van Haarlem</creatorcontrib><creatorcontrib>C Van Hulse</creatorcontrib><creatorcontrib>Veretennikov, D</creatorcontrib><creatorcontrib>Vikhrov, V</creatorcontrib><creatorcontrib>Vilardi, I</creatorcontrib><creatorcontrib>Yaschenko, S</creatorcontrib><creatorcontrib>Zihlmann, B</creatorcontrib><creatorcontrib>Zupranski, P</creatorcontrib><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central</collection><collection>Aerospace Database</collection><collection>SciTech Premium Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>ProQuest advanced technologies & aerospace journals</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>The European physical journal. C, Particles and fields</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Airapetian, A</au><au>Akopov, N</au><au>Akopov, Z</au><au>Aschenauer, E C</au><au>Augustyniak, W</au><au>Belostotski, S</au><au>Blok, H P</au><au>Borissov, A</au><au>Bryzgalov, V</au><au>Capitani, G P</au><au>Ciullo, G</au><au>Contalbrigo, M</au><au>Deconinck, W</au><au>De Leo, R</au><au>De Sanctis, E</au><au>Düren, M</au><au>Elbakian, G</au><au>Ellinghaus, F</au><au>Felawka, L</au><au>Frullani, S</au><au>Garibaldi, F</au><au>Gavrilov, G</au><au>Gharibyan, V</au><au>Goloskokov, S V</au><au>Holler, Y</au><au>Ivanilov, A</au><au>Jackson, H E</au><au>Joosten, S</au><au>Kaiser, R</au><au>Karyan, G</au><au>Kisselev, A</au><au>Korotkov, V</au><au>Kozlov, V</au><au>Kravchenko, P</au><au>Kroll, P</au><au>Lagamba, L</au><au>Lapikás, L</au><au>Lehmann, I</au><au>Lenisa, P</au><au>Lorenzon, W</au><au>Manaenkov, S I</au><au>Marianski, B</au><au>Marukyan, H</au><au>Miyachi, Y</au><au>Movsisyan, A</au><au>Muccifora, V</au><au>Nass, A</au><au>W-D Nowak</au><au>Pappalardo, L L</au><au>Petrosyan, A</au><au>Reimer, P E</au><au>Reolon, A R</au><au>Riedl, C</au><au>Rith, K</au><au>Rosner, G</au><au>Rostomyan, A</au><au>Ryckbosch, D</au><au>Salomatin, Y</au><au>Schäfer, A</au><au>Schnell, G</au><au>Seitz, B</au><au>T-A Shibata</au><au>Shutov, V</au><au>Statera, M</au><au>Terkulov, A</au><au>Truty, R</au><au>Trzcinski, A</au><au>Tytgat, M</au><au>Y Van Haarlem</au><au>C Van Hulse</au><au>Veretennikov, D</au><au>Vikhrov, V</au><au>Vilardi, I</au><au>Yaschenko, S</au><au>Zihlmann, B</au><au>Zupranski, P</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ratios of helicity amplitudes for exclusive ρ 0 electroproduction on transversely polarized protons</atitle><jtitle>The European physical journal. C, Particles and fields</jtitle><date>2017-06-01</date><risdate>2017</risdate><volume>77</volume><issue>6</issue><spage>1</spage><epage>23</epage><pages>1-23</pages><issn>1434-6044</issn><eissn>1434-6052</eissn><abstract>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 F012012, 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 F012012. 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.</abstract><cop>Heidelberg</cop><pub>Springer Nature B.V</pub><doi>10.1140/epjc/s10052-017-4899-1</doi><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1434-6044 |
| ispartof | The European physical journal. C, Particles and fields, 2017-06, Vol.77 (6), p.1-23 |
| issn | 1434-6044 1434-6052 |
| language | eng |
| recordid | cdi_proquest_journals_1977788766 |
| source | Springer_OA刊; SpringerLink (Online service); Directory of Open Access Journals; EZB Electronic Journals Library |
| subjects | Accuracy Amplitudes Beams (radiation) Form factors Helicity Particle production Polarization Positron beams |
| title | Ratios of helicity amplitudes for exclusive ρ 0 electroproduction on transversely polarized protons |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T05%3A04%3A51IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Ratios%20of%20helicity%20amplitudes%20for%20exclusive%20%CF%81%200%20electroproduction%20on%20transversely%20polarized%20protons&rft.jtitle=The%20European%20physical%20journal.%20C,%20Particles%20and%20fields&rft.au=Airapetian,%20A&rft.date=2017-06-01&rft.volume=77&rft.issue=6&rft.spage=1&rft.epage=23&rft.pages=1-23&rft.issn=1434-6044&rft.eissn=1434-6052&rft_id=info:doi/10.1140/epjc/s10052-017-4899-1&rft_dat=%3Cproquest%3E1977788766%3C/proquest%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1977788766&rft_id=info:pmid/&rfr_iscdi=true |