Physical review letters, 2019-10, Vol.123 (18)
- Li, W. B.
- Huber, G. M.
- Blok, H. P.
- Gaskell, D.
- Horn, T.
- Semenov-Tian-Shansky, K.
- Pire, B.
- Szymanowski, L.
- Laget, J. -M.
- Aniol, K.
- Arrington, J.
- Beise, E. J.
- Boeglin, W.
- Brash, E. J.
- Breuer, H.
- Chang, C. C.
- Christy, M. E.
- Ent, R.
- Gibson, E. F.
- Holt, R. J.
- Jin, S.
- Jones, M. K.
- Keppel, C. E.
- Kim, W.
- King, P. M.
- Kovaltchouk, V.
- Liu, J.
- Lolos, G. J.
- Mack, D. J.
- Margaziotis, D. J.
- Markowitz, P.
- Matsumura, A.
- Meekins, D.
- Miyoshi, T.
- Mkrtchyan, H.
- Niculescu, I.
- Okayasu, Y.
- Pentchev, L.
- Perdrisat, C.
- Potterveld, D.
- Punjabi, V.
- Reimer, P. E.
- Reinhold, J.
- Roche, J.
- Roos, P. G.
- Sarty, A.
- Smith, G. R.
- Tadevosyan, V.
- Tang, L. G.
- Tvaskis, V.
- Volmer, J.
- Vulcan, W.
- Warren, G.
- Wood, S. A.
- Xu, C.
- Zheng, X.
2019
Details
- Autor(en) / Beteiligte
- Li, W. B.
- Huber, G. M.
- Blok, H. P.
- Gaskell, D.
- Horn, T.
- Semenov-Tian-Shansky, K.
- Pire, B.
- Szymanowski, L.
- Laget, J. -M.
- Aniol, K.
- Arrington, J.
- Beise, E. J.
- Boeglin, W.
- Brash, E. J.
- Breuer, H.
- Chang, C. C.
- Christy, M. E.
- Ent, R.
- Gibson, E. F.
- Holt, R. J.
- Jin, S.
- Jones, M. K.
- Keppel, C. E.
- Kim, W.
- King, P. M.
- Kovaltchouk, V.
- Liu, J.
- Lolos, G. J.
- Mack, D. J.
- Margaziotis, D. J.
- Markowitz, P.
- Matsumura, A.
- Meekins, D.
- Miyoshi, T.
- Mkrtchyan, H.
- Niculescu, I.
- Okayasu, Y.
- Pentchev, L.
- Perdrisat, C.
- Potterveld, D.
- Punjabi, V.
- Reimer, P. E.
- Reinhold, J.
- Roche, J.
- Roos, P. G.
- Sarty, A.
- Smith, G. R.
- Tadevosyan, V.
- Tang, L. G.
- Tvaskis, V.
- Volmer, J.
- Vulcan, W.
- Warren, G.
- Wood, S. A.
- Xu, C.
- Zheng, X.
- Titel
- Unique Access to u -Channel Physics: Exclusive Backward-Angle Omega Meson Electroproduction
- Ist Teil von
- Physical review letters, 2019-10, Vol.123 (18)
- Ort / Verlag
- United States: American Physical Society (APS)
- Erscheinungsjahr
- 2019
- Link zum Volltext
- Quelle
- Free E-Journal (出版社公開部分のみ）
- Beschreibungen/Notizen
- Backward-angle meson electroproduction above the resonance region, which was previously ignored, is anticipated to offer unique access to the three quark plus sea component of the nucleon wave function. In this Letter, we present the first complete separation of the four electromagnetic structure functions above the resonance region in exclusive ω electroproduction off the proton, ep → e'pω , at central Q2 values of 1.60, 2.45 GeV2 , at W=2.21 GeV . The results of our pioneering -u≈-umin study demonstrate the existence of a unanticipated backward-angle cross section peak and the feasibility of full L / T / LT / TT separations in this never explored kinematic territory. At Q2=2.45 GeV2 , the observed dominance of σT over σL , is qualitatively consistent with the collinear QCD description in the near-backward regime, in which the scattering amplitude factorizes into a hard subprocess amplitude and baryon to meson transition distribution amplitudes: universal nonperturbative objects only accessible through backward-angle kinematics.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0031-9007eISSN: 1079-7114DOI: 10.1103/PhysRevLett.123.182501Titel-ID: cdi_osti_scitechconnect_1573494
- Format
- –
- Schlagworte
- PHYSICS OF ELEMENTARY PARTICLES AND FIELDS