دورية أكاديمية
Hard Two-Photon Contribution to Elastic Lepton-Proton Scattering Determined by the OLYMPUS Experiment
| العنوان: | Hard Two-Photon Contribution to Elastic Lepton-Proton Scattering Determined by the OLYMPUS Experiment |
|---|---|
| المؤلفون: | Henderson, B. S., Ice, L. D., Khaneft, D., O'Connor, C., Russell, R., Schmidt, A., Bernauer, J. C, Kohl, M., Akopov, N., Alarcon, R., Ates, O., Avetisyan, A., Beck, R., Belostotski, S., Bessuille, J., Brinker, F., Calarco, J. R., CARASSITI, Vittore, Cisbani, E., CIULLO, Giuseppe, CONTALBRIGO, Marco, De Leo, R., Diefenbach, J., Donnelly, T. W., Dow, K., Elbakian, G., Eversheim, P. D., Frullani, S., Funke, C.h., Gavrilov, G., Gläser, B., Görrissen, N., Hasell, D. K., Hauschildt, J., Hoffmeister, P.h., Holler, Y., Ihloff, E., Izotov, A., Kaiser, R., Karyan, G., Kelsey, J., Kiselev, A., Klassen, P., Krivshich, A., Lehmann, I., LENISA, Paolo, Lenz, D., Lumsden, S., Ma, Y., Maas, F., Marukyan, H., Miklukho, O., Milner, R. G., Movsisyan, A., Murray, M., Naryshkin, Y., Perez Benito, R., Perrino, R., Redwine, R. P., Rodríguez Piñeiro, D., Rosner, G., Schneekloth, U., Seitz, B., STATERA, Marco, Thiel, A., Vardanyan, H., Veretennikov, D., Vidal, C., Winnebeck, A., Yeganov, V. |
| المساهمون: | Henderson, B. S., Ice, L. D., Khaneft, D., O'Connor, C., Russell, R., Schmidt, A., Bernauer, J. C, Kohl, M., Akopov, N., Alarcon, R., Ates, O., Avetisyan, A., Beck, R., Belostotski, S., Bessuille, J., Brinker, F., Calarco, J. R., Carassiti, Vittore, Cisbani, E., Ciullo, Giuseppe, Contalbrigo, Marco, De Leo, R., Diefenbach, J., Donnelly, T. W., Dow, K., Elbakian, G., Eversheim, P. D., Frullani, S., Funke, C. h., Gavrilov, G., Gläser, B., Görrissen, N., Hasell, D. K., Hauschildt, J., Hoffmeister, P. h., Holler, Y., Ihloff, E., Izotov, A., Kaiser, R., Karyan, G., Kelsey, J., Kiselev, A., Klassen, P., Krivshich, A., Lehmann, I., Lenisa, Paolo, Lenz, D., Lumsden, S., Ma, Y., Maas, F., Marukyan, H., Miklukho, O., Milner, R. G., Movsisyan, A., Murray, M., Naryshkin, Y., Perez Benito, R., Perrino, R., Redwine, R. P., Rodríguez Piñeiro, D., Rosner, G., Schneekloth, U., Seitz, B., Statera, Marco, Thiel, A., Vardanyan, H., Veretennikov, D., Vidal, C., Winnebeck, A., Yeganov, V. |
| سنة النشر: | 2017 |
| المجموعة: | Università degli Studi di Ferrara: CINECA IRIS |
| مصطلحات موضوعية: | electromagnetic form factors, transfers, ratio |
| الوصف: | The OLYMPUS Collaboration reports on a precision measurement of the positron-proton to electron-proton elastic cross section ratio, R2γ, a direct measure of the contribution of hard two-photon exchange to the elastic cross section. In the OLYMPUS measurement, 2.01 GeV electron and positron beams were directed through a hydrogen gas target internal to the DORIS storage ring at DESY. A toroidal magnetic spectrometer instrumented with drift chambers and time-of-flight scintillators detected elastically scattered leptons in coincidence with recoiling protons over a scattering angle range of ≈20° to 80°. The relative luminosity between the two beam species was monitored using tracking telescopes of interleaved gas electron multiplier and multiwire proportional chamber detectors at 12°, as well as symmetric Møller or Bhabha calorimeters at 1.29°. A total integrated luminosity of 4.5 fb-1 was collected. In the extraction of R2γ, radiative effects were taken into account using a Monte Carlo generator to simulate the convolutions of internal bremsstrahlung with experiment-specific conditions such as detector acceptance and reconstruction efficiency. The resulting values of R2γ, presented here for a wide range of virtual photon polarization 0.456<0.978, are smaller than some hadronic two-photon exchange calculations predict, but are in reasonable agreement with a subtracted dispersion model and a phenomenological fit to the form factor data. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | STAMPA |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/pmid/28306315; info:eu-repo/semantics/altIdentifier/wos/WOS:000396045900004; volume:118; issue:9; firstpage:092501-1; lastpage:092501-5; numberofpages:5; journal:PHYSICAL REVIEW LETTERS; http://hdl.handle.net/11392/2368472Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85014516545; http://harvest.aps.org/bagit/articles/10.1103/PhysRevLett.118.092501/apsxmlTest; https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.092501Test |
| DOI: | 10.1103/PhysRevLett.118.092501 |
| DOI: | 10.1103/PhysRevLett.118.092501/apsxml |
| الإتاحة: | https://doi.org/10.1103/PhysRevLett.118.092501Test http://hdl.handle.net/11392/2368472Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.D72BE5F9 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1103/PhysRevLett.118.092501 |
|---|