Phys. Rev. C
78,
015202
(2008)
[6 pages]
Ratios of 15N/12C and 4He/12C inclusive electroproduction cross sections in the nucleon resonance region
P. E. Bosted et al. CLAS Collaboration
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P. E. Bosted35,*, R. Fersch39, G. Adams31, M. Amarian29, S. Anefalos17, M. Anghinolfi18, G. Asryan40, H. Avakian17,35, H. Bagdasaryan29,40, N. Baillie39, J. P. Ball2, N. A. Baltzell34, S. Barrow13, V. Batourine35, M. Battaglieri18, K. Beard21, I. Bedlinskiy20, M. Bektasoglu29, M. Bellis5,31, N. Benmouna14, A. S. Biselli11, B. E. Bonner32, S. Bouchigny19,35, S. Boiarinov20,35, R. Bradford5, D. Branford10, W. K. Brooks35, S. Bültmann29, V. D. Burkert35, C. Butuceanu39, J. R. Calarco26, S. L. Careccia29, D. S. Carman35, B. Carnahan6, A. Cazes34, S. Chen13, P. L. Cole16,35, P. Collins2, P. Coltharp13, D. Cords35,†, P. Corvisiero18, D. Crabb38, H. Crannell6, V. Crede13, J. P. Cummings31, R. De Masi7, R. De Vita18, E. De Sanctis17, P. V. Degtyarenko35, H. Denizli30, L. Dennis13, A. Deur35, C. Djalali34, G. E. Dodge29, J. Donnelly15, D. Doughty8,35, P. Dragovitsch13, M. Dugger2, K. V. Dharmawardane29,‡, S. Dytman30, O. P. Dzyubak34, H. Egiyan35,39,§, K. S. Egiyan40,†, L. Elouadrhiri8,35, P. Eugenio13, R. Fatemi38, G. Fedotov25, R. J. Feuerbach5, T. A. Forest29, A. Fradi19, H. Funsten39, M. Garçon7, G. Gavalian26,29, G. P. Gilfoyle33, K. L. Giovanetti21, F. X. Girod7, J. T. Goetz3, E. Golovatch18,**, R. W. Gothe34, K. A. Griffioen39, M. Guidal19, M. Guillo34, N. Guler29, L. Guo35, V. Gyurjyan35, C. Hadjidakis19, K. Hafidi1, R. S. Hakobyan6, J. Hardie8,35, D. Heddle8,35, F. W. Hersman26, K. Hicks28, I. Hleiqawi28, M. Holtrop26, M. Huertas34, C. E. Hyde-Wright29, Y. Ilieva14, D. G. Ireland15, B. S. Ishkhanov25, E. L. Isupov25, M. M. Ito35, D. Jenkins37, H. S. Jo19, K. Joo9, H. G. Juengst29, N. Kalantarians29, C. Keith35, J. D. Kellie15, M. Khandaker27, K. Y. Kim30, K. Kim22, W. Kim22, A. Klein29,††, F. J. Klein6,12, M. Klusman31, M. Kossov20, L. H. Kramer12,35, V. Kubarovsky31,35, J. Kuhn5,31, S. E. Kuhn29, S. V. Kuleshov20, J. Lachniet5,29, J. M. Laget7,35, J. Langheinrich34, D. Lawrence24, Ji Li31, A. C. S. Lima14, K. Livingston15, H. Lu34, K. Lukashin6, M. MacCormick19, N. Markov9, S. McAleer13, B. McKinnon15, J. W. C. McNabb5, B. A. Mecking35, M. D. Mestayer35, C. A. Meyer5, T. Mibe28, K. Mikhailov20, R. Minehart38, M. Mirazita17, R. Miskimen24, V. Mokeev25, L. Morand7, S. A. Morrow7,19, M. Moteabbed12, J. Mueller30, G. S. Mutchler32, P. Nadel-Turonski14, R. Nasseripour12,34, S. Niccolai14,19, G. Niculescu21, I. Niculescu14,21, B. B. Niczyporuk35, M. R. Niroula29, R. A. Niyazov29,35, M. Nozar35, G. V. O'Rielly14, M. Osipenko18,25, A. I. Ostrovidov13, K. Park22, E. Pasyuk2, C. Paterson15, S. A. Philips14, J. Pierce38, N. Pivnyuk20, D. Pocanic38, O. Pogorelko20, E. Polli17, S. Pozdniakov20, B. M. Preedom34, J. W. Price4, Y. Prok38,‡‡, D. Protopopescu15,26, L. M. Qin29, B. A. Raue12,35, G. Riccardi13, G. Ricco18, M. Ripani18, G. Rosner15, P. Rossi17, D. Rowntree23, P. D. Rubin33, F. Sabatié7,29, C. Salgado27, J. P. Santoro35,37,a, V. Sapunenko18,35, R. A. Schumacher5, V. S. Serov20, Y. G. Sharabian35, J. Shaw24, N. V. Shvedunov25, A. V. Skabelin23, E. S. Smith35, L. C. Smith38, D. I. Sober6, A. Stavinsky20, S. S. Stepanyan22, S. Stepanyan8,35,40, B. E. Stokes13, P. Stoler31, S. Strauch34, R. Suleiman23, M. Taiuti18, S. Taylor32, D. J. Tedeschi34, U. Thoma35,b, A. Tkabladze14, S. Tkachenko29, L. Todor5, M. Ungaro9, M. F. Vineyard33,36, A. V. Vlassov20, L. B. Weinstein29, D. P. Weygand35, M. Williams5, E. Wolin35, M. H. Wood34,c, A. Yegneswaran35, J. Yun29, L. Zana26, J. Zhang29, B. Zhao9, and Z. Zhao34 (CLAS Collaboration)
1Argonne National Laboratory, Argonne, Illinois 60439, USA
2Arizona State University, Tempe, Arizona 85287-1504, USA
3University of California at Los Angeles, Los Angeles, California 90095-1547, USA
4California State University, Dominguez Hills, Carson, California 90747, USA
5Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
6Catholic University of America, Washington, D.C. 20064, USA
7CEA-Saclay, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
8Christopher Newport University, Newport News, Virginia 23606, USA
9University of Connecticut, Storrs, Connecticut 06269, USA
10Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
11Fairfield University, Fairfield, Connecticut 06824, USA
12Florida International University, Miami, Florida 33199, USA
13Florida State University, Tallahassee, Florida 32306, USA
14George Washington University, Washington, D.C. 20052, USA
15University of Glasgow, Glasgow G12 8QQ, United Kingdom
16Idaho State University, Pocatello, Idaho 83209, USA
17INFN, Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
18INFN, Sezione di Genova, I-16146 Genova, Italy
19Institut de Physique Nucleaire ORSAY, Orsay, France
20Institute of Theoretical and Experimental Physics, RU-117259 Moscow, Russia
21James Madison University, Harrisonburg, Virginia 22807, USA
22Kyungpook National University, Daegu 702-701, South Korea
23Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
24University of Massachusetts, Amherst, Massachusetts 01003, USA
25Moscow State University, General Nuclear Physics Institute, RU-119899 Moscow, Russia
26University of New Hampshire, Durham, New Hampshire 03824-3568, USA
27Norfolk State University, Norfolk, Virginia 23504, USA
28Ohio University, Athens, Ohio 45701, USA
29Old Dominion University, Norfolk, Virginia 23529, USA
30University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
31Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
32Rice University, Houston, Texas 77005-1892, USA
33University of Richmond, Richmond, Virginia 23173, USA
34University of South Carolina, Columbia, South Carolina 29208, USA
35Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
36Union College, Schenectady, New York 12308, USA
37Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0435, USA
38University of Virginia, Charlottesville, Virginia 22901, USA
39College of William and Mary, Williamsburg, Virginia 23187-8795, USA
40Yerevan Physics Institute, 375036 Yerevan, Armenia
Received 17 December 2007; revised 13 April 2008; published 11 July 2008
The (W,Q2) dependence of the ratio of inclusive electron scattering cross sections for 15N/12C was determined in the kinematic ranges 0.8<W<2 GeV and 0.2<Q2<1 GeV2 using 2.285 GeV electrons and the CLAS detector at Jefferson Lab. The ratios exhibit only slight resonance structure, in agreement with a simple phenomenological model and an extrapolation of deep-inelastic scattering ratios to low Q2. Ratios of 4He/12C using 1.6 to 2.5 GeV electrons were measured with very high statistical precision and were used to correct for He in the N and C targets. The (W,Q2) dependence of the 4He/12C ratios is in good agreement with that of the phenomenological model and exhibit significant resonance structure centered at W=0.94,1.23, and 1.5 GeV.
© 2008 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.78.015202
DOI:
10.1103/PhysRevC.78.015202
PACS:
25.30.Fj, 13.60.Hb, 14.20.Gk, 27.20.+n
*bosted@jlab.org; corresponding author. †Deceased ‡Current address: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA. §Current address: University of New Hampshire, Durham, New Hampshire 03824-3568, USA. **Current address: Moscow State University, General Nuclear Physics Institute, 119899 Moscow, Russia. ††Current address: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. ‡‡Current address: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA. aCurrent address: Catholic University of America, Washington, D.C. 20064, USA. bCurrent address: Physikalisches Institut der Universität Giessen, 35392 Giessen, Germany. cCurrent address: University of Massachusetts, Amherst, Massachusetts 01003, USA.
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