Article
Evidence for a backward peak in the gamma d -> pi(0)d cross section near the eta threshold
European Physical Journal A
(2010)
- Y Ilieva
- BL Berman
- AE Kudryavtsev
- II Strakovsky
- VE Tarasov
- M Amarian
- P Ambrozewicz
- M Anghinolfi
- G Asryan
- H Avakian
- H Bagdasaryan
- N Baillie
- JP Ball
- NA Baltzell
- V Batourine
- M Battaglieri
- I Bedlinskiy
- M Bellis
- N Benmouna
- AS Biselli
- S Bouchigny
- S Boiarinov
- R Bradford
- D Branford
- WJ Briscoe
- WK Brooks
- S Bultmann
- VD Burkert
- C Butuceanu
- JR Calarco
- SL Careccia
- DS Carman
- S Chen
- PL Cole
- P Collins
- P Coltharp
- D Crabb
- V Crede
- R De Masi
- E De Sanctis
- R De Vita
- PV Degtyarenko
- A Deur
- R Dickson
- C Djalali
- GE Dodge
- J Donnelly
- D Doughty
- M Dugger
- OP Dzyubak
- H Egiyan
- KS Egiyan
- L Elouadrhiri
- P Eugenio
- G Fedotov
- G Feldman
- H Funsten
- M Garcon
- G Gavalian
- GP Gilfoyle
- KL Giovanetti
- FX Girod
- JT Goetz
- A Gonenc
- RW Gothe
- KA Griffioen
- M Guidal
- N Guler
- L Guo
- V Gyurjyan
- K Hafidi
- RS Hakobyan
- FW Hersman
- K Hicks
- I Hleiqawi
- M Holtrop
- CE Hyde-Wright
- DG Ireland
- BS Ishkhanov
- EL Isupov
- MM Ito
- D Jenkins
- HS Jo
- K Joo
- HG Juengst
- N Kalantarians
- JD Kellie
- M Khandaker
- W Kim
- A Klein
- FJ Klein
- M Kossov
- Z Krahn
- LH Kramer
- V Kubarovsky
- J Kuhn
- SE Kuhn
- SV Kuleshov
- J Lachniet
- JM Laget
- J Langheinrich
- D Lawrence
- K Livingston
- H Lu
- M MacCormick
- N Markov
- B McKinnon
- BA Mecking
- MD Mestayer
- CA Meyer
- T Mibe
- K Mikhailov
- M Mirazita
- R Miskimen
- V Mokeev
- K Moriya
- SA Morrow
- M Moteabbed
- E Munevar
- GS Mutchler
- P Nadel-Turonski
- R Nasseripour
- S Niccolai
- G Niculescu
- I Niculescu
- BB Niczyporuk
- MR Niroula
- RA Niyazov
- M Nozar
- M Osipenko
- AI Ostrovidov
- K Park
- E Pasyuk
- C Paterson
- J Pierce
- N Pivnyuk
- O Pogorelko
- S Pozdniakov
- JW Price
- Y Prok
- D Protopopescu
- BA Raue
- G Ricco
- M Ripani
- BG Ritchie
- F Ronchetti
- G Rosner
- P Rossi
- F Sabatie
- C Salgado
- JP Santoro
- V Sapunenko
- RA Schumacher
- VS Serov
- YG Sharabian
- NV Shvedunov
- ES Smith
- LC Smith
- DI Sober
- A Stavinsky
- SS Stepanyan
- S Stepanyan
- BE Stokes
- P Stoler
- S Strauch
- M Taiuti
- DJ Tedeschi
- U Thoma
- A Tkabladze
- S Tkachenko
- C Tur
- M Ungaro
- MF Vineyard
- AV Vlassov
- DP Watts
- LB Weinstein
- DP Weygand
- M Williams, University of Massachusetts - Amherst
- E Wolin
- MH Wood
- A Yegneswaran
- L Zana
- J Zhang
- B Zhao
- Z Zhao
Abstract
High-quality cross sections for the reaction gamma d -> pi(0)d have been measured using the CLAS at Jefferson Lab over a wide energy range near and above the eta-meson photoproduction threshold. At backward c.m. angles for the outgoing pions, we observe a resonance-like structure near E-gamma = 700 MeV. Our model analysis shows that it can be explained by eta excitation in the intermediate state. The effect is the result of the contribution of the N(1535) S-11-resonance to the amplitudes of the subprocesses occurring between the two nucleons and of a two-step process in which the excitation of an intermediate eta-meson dominates.
Disciplines
Publication Date
January 1, 2010
Publisher Statement
http://dx.doi.org/10.1140/epja/i2010-10918-x
Citation Information
Y Ilieva, BL Berman, AE Kudryavtsev, II Strakovsky, et al.. "Evidence for a backward peak in the gamma d -> pi(0)d cross section near the eta threshold" European Physical Journal A Vol. 43 Iss. 3 (2010) Available at: http://works.bepress.com/michael_williams/2/