Date: Mon, 22 Feb 10 01:00:20 GMT Subject: nucl-ex daily 1 new + 3 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: nucl-ex@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Thu 18 Feb 10 21:00:02 GMT to Fri 19 Feb 10 21:00:02 GMT ------------------------------------------------------------------------------ \\ arXiv:1002.3776 Date: Fri, 19 Feb 2010 16:42:36 GMT (266kb) Title: Measurement of the Nucleon Structure Function F2 in the Nuclear Medium and Evaluation of its Moments Authors: M. Osipenko and CLAS Collaboration Categories: nucl-ex Comments: 37 pages, 15 figures \\ We report on the measurement of inclusive electron scattering off a carbon target performed with CLAS at Jefferson Laboratory. A combination of three different beam energies 1.161, 2.261 and 4.461 GeV allowed us to reach an invariant mass of the final-state hadronic system W~2.4 GeV with four-momentum transfers Q2 ranging from 0.2 to 5 GeV2. These data, together with previous measurements of the inclusive electron scattering off proton and deuteron, which cover a similar continuous two-dimensional region of Q2 and Bjorken variable x, permit the study of nuclear modifications of the nucleon structure. By using these, as well as other world data, we evaluated the F2 structure function and its moments. Using an OPE-based twist expansion, we studied the Q2-evolution of the moments, obtaining a separation of the leading-twist and the total higher-twist terms. The carbon-to-deuteron ratio of the leading-twist contributions to the F2 moments exhibits the well known EMC effect, compatible with that discovered previously in x-space. The total higher-twist term in the carbon nucleus appears, although with large systematic uncertainites, to be smaller with respect to the deuteron case for n<7, suggesting partial parton deconfinement in nuclear matter. We speculate that the spatial extension of the nucleon is changed when it is immersed in the nuclear medium. \\ ( http://arxiv.org/abs/1002.3776 , 266kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:0910.4920 (*cross-listing*) Date: Mon, 26 Oct 2009 16:22:10 GMT (27kb) Date (revised v2): Fri, 19 Feb 2010 18:49:06 GMT (27kb) Title: Confirmation of quark-hadron duality in the neutron F_2 structure function Authors: S. P. Malace, Y. Kahn, W. Melnitchouk, C. E. Keppel Categories: hep-ph nucl-ex nucl-th Comments: 4 pages, 4 figures; minor content changes; to appear in Phys. Rev. Lett Report-no: JLAB-THY-09-1096 \\ We apply a recently developed technique to extract for the first time the neutron F_2^n structure function from inclusive proton and deuteron data in the nucleon resonance region, and test the validity of quark-hadron duality in the neutron. We establish the accuracy of duality in the low-lying neutron resonance regions over a range of Q^2, and compare with the corresponding results on the proton and with theoretical expectations. The confirmation of duality in both the neutron and proton opens the possibility of using resonance region data to constrain parton distributions at large x. \\ ( http://arxiv.org/abs/0910.4920 , 27kb) ------------------------------------------------------------------------------ \\ arXiv:1002.3459 (*cross-listing*) Date: Thu, 18 Feb 2010 09:26:49 GMT (64kb) Title: The energy dependence of the pp->K+ n Sigma+ reaction close to threshold Authors: Yu. Valdau, S. Barsov, M. B\"uscher, D. Chiladze, S. Dymov, A. Dzyuba, M. Hartmann, A. Kacharava, I. Keshelashvili, A. Khoukaz, V. Koptev, P. Kulessa, S. Merzliakov, M. Mielke, S. Mikirtychiants, M. Nekipelov, H. Ohm, M. Papenbrock, F. Rathmann, V. Serdyuk, H. Str\"oher, S. Trusov, C. Wilkin Categories: hep-ex nucl-ex Comments: Submitted to PRC \\ The production of the Sigma+ hyperon through the pp->K+nSigma+ reaction has been investigated at four energies close to threshold, 1.826, 1.920, 1.958, and 2.020 GeV. At low energies, correlated K+pi+ pairs can only originate from Sigma+ production so that their measurement allows the total cross section for the reaction to be determined. The results obtained are completely consistent with the values extracted from the study of the K+-proton correlation spectra obtained in the same experiment. These spectra, as well as the inclusive K+ momentum distributions, also provide conservative upper limits on the Sigma+ production rates. The measurements show a Sigma+ production cross section that varies roughly like phase space and, in particular, none of the three experimental approaches used supports the anomalously high near-threshold pp->K+ nSigma+ total cross section previously reported [T. Rozek et al., Phys. Lett. B 643, 251 (2006)]. \\ ( http://arxiv.org/abs/1002.3459 , 64kb) ------------------------------------------------------------------------------ \\ arXiv:1002.3527 (*cross-listing*) Date: Wed, 17 Feb 2010 23:38:06 GMT (19090kb,D) Title: 13th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Moving Forward into the LHC Era Authors: Mario Deile, David d'Enterria, Albert De Roeck, M.G. Albrow, A. Alkin, E. Avsar, V.A. Bednyakov, R. Brower, A. Bunyatyan, H. Burkhardt, A. Caldwell, W. Carvalho, M. Chaichian, E. Chapon, Z. Conesa del Valle, J.R. Cudell, J. Dainton, M. Deak, M. Djuric, K. Eggert, S. Eidelman, J. Ellis, E. Ferreira, J. Forshaw, S. Giani, E. Gotsman, K. Goulianos, R. Granier de Cassagnac, P. Grafstrom, A. Grebenyuk, B. Grube, F. Hautmann, S. Heinemeyer, M. Heller, J. Hoerandel, J. Hollar, P. Hoyer, K. Huitu, D.S. Hwang, M.M. Islam, L.L. Jenkovszky, H. Jung, V. Juranek, A. Kaidalov, J. Kaspar, J. Keates, O. Kepka, L. Khein, V.A. Khoze, T. Kodama, A.K. Kohara, H. Kowalski, V. Kundrat, K. Kutak, T. Lappi, L. Lipatov, M. Lokajicek, I.P. Lokhtin, R.J. Luddy, G.I. Lykasov, V.V. Lyuboshitz, V.L. Lyuboshitz, V.V. Lyubushkin, T.V. Lyubushkina, A.K. Managadze, U. Maor, P. Marage, A. Martin, E. Martynov, S. Marzani, C. Mesropian, P. Newman, G. Niewiadomski, R.S. Pasechnik, L. Lipatov, V. Pauk, V. Petrov, T. Pierog, A.D. Pilkington, J. Pinfold, M. Poghosyan, A.V. Prokudin, A. Proskuryakov, J. Rojo, E. Romanets, D.A. Ross, C. Royon, G. Ruggiero, M.G. Ryskin, K. Safarik, L.I. Sarycheva, R. Schicker, F. Schwennsen, O.V. Selyugin, A.M. Snigirev, J. Soffer, T Stanev, M. Strikman, A. Szczurek, C.-.I Tan, M. Tasevsky, O.V. Teryaev, A. Tricomi, S.M. Troshin, N.E. Tyurin, G. Watt, G. Weiglein, K. Werner, S. Yaschenko Categories: hep-ph astro-ph.HE hep-ex nucl-ex nucl-th Comments: 514 pages. Proceedings of the 13th International Conference on Elastic and Diffractive Scattering, CERN, Geneva, June-July 2009. DESY-PROC-2010-XXX to appear \\ Proceedings of the 13th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Moving Forward into the LHC Era \\ ( http://arxiv.org/abs/1002.3527 , 19090kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- For subscribe options to combined physics archives, e-mail To: physics@arXiv.org, Subject: subscribe ----------------------------------------------------------------------------- For help on viewing and making submissions, see http://arXiv.org/help/ For a list of archive mirror sites, see http://arXiv.org/servers.html ----------------------------------------------------------------------------- Third-party submissions cause excessive problems. Author self-submissions are exceedingly preferred. E-mail submissions have been discontinued in favor of better support for Web submissions. See http://arXiv.org/help/uploads