Measurement of parton distributions of strange quarks in the nucleon from charged-kaon production in deep-inelastic scattering on the deuteron

A. Airapetian, N. Akopov, Z. Akopov, A. Andrus, E. C. Aschenauer, W. Augustyniak, R. Avakian, A. Avetissian, E. Avetissian, S. Belostotski, N. Bianchi, H. P. Blok, H. Böttcher, C. Bonomo, A. Borissov, A. Brüll, V. Bryzgalov, J. Burns, M. Capiluppi, G. P. CapitaniE. Cisbani, G. Ciullo, M. Contalbrigo, P. F. Dalpiaz, W. Deconinck, R. De Leo, M. Demey, L. De Nardo, E. De Sanctis, M. Diefenthaler, P. Di Nezza, J. Dreschler, M. Düren, M. Ehrenfried, A. Elalaoui-Moulay, G. Elbakian, F. Ellinghaus, U. Elschenbroich, R. Fabbri, A. Fantoni, L. Felawka, S. Frullani, A. Funel, D. Gabbert, G. Gapienko, V. Gapienko, F. Garibaldi, G. Gavrilov, V. Gharibyan, F. Giordano, S. Gliske, I. M. Gregor, H. Guler, C. Hadjidakis, D. Hasch, T. Hasegawa, W. H.A. Hesselink, G. Hill, A. Hillenbrand, M. Hoek, Y. Holler, B. Hommez, I. Hristova, G. Iarygin, Y. Imazu, A. Ivanilov, A. Izotov, H. E. Jackson, A. Jgoun, S. Joosten, R. Kaiser, T. Keri, E. Kinney, A. Kisselev, T. Kobayashi, M. Kopytin, V. Korotkov, V. Kozlov, P. Kravchenko, V. G. Krivokhijine, L. Lagamba, R. Lamb, L. Lapikás, I. Lehmann, P. Lenisa, P. Liebing, L. A. Linden-Levy, A. Lopez Ruiz, W. Lorenzon, S. Lu, X. R. Lu, B. Q. Ma, D. Mahon, B. Maiheu, N. C.R. Makins, L. Manfré, Y. Mao, B. Marianski, H. Marukyan, V. Mexner, C. A. Miller, Y. Miyachi, V. Muccifora, M. Murray, A. Mussgiller, A. Nagaitsev, E. Nappi, Y. Naryshkin, A. Nass, M. Negodaev, W. D. Nowak, A. Osborne, L. L. Pappalardo, R. Perez-Benito, N. Pickert, M. Raithel, D. Reggiani, P. E. Reimer, A. Reischl, A. R. Reolon, C. Riedl, K. Rith, S. E. Rock, G. Rosner, A. Rostomyan, L. Rubacek, J. Rubin, D. Ryckbosch, Y. Salomatin, I. Sanjiev, A. Schäfer, G. Schnell, K. P. Schüler, B. Seitz, C. Shearer, T. A. Shibata, V. Shutov, M. Stancari, M. Statera, E. Steffens, J. J.M. Steijger, H. Stenzel, J. Stewart, F. Stinzing, J. Streit, P. Tait, S. Taroian, B. Tchuiko, A. Terkulov, A. Trzcinski, M. Tytgat, A. Vandenbroucke, P. B. van der Nat, G. van der Steenhoven, Y. van Haarlem, C. van Hulse, M. Varanda, D. Veretennikov, V. Vikhrov, I. Vilardi, C. Vogel, S. Wang, S. Yaschenko, H. Ye, Y. Ye, Z. Ye, S. Yen, W. Yu, D. Zeiler, B. Zihlmann, P. Zupranski

Research output: Contribution to journalArticlepeer-review

Abstract

The momentum and helicity density distributions of the strange quark sea in the nucleon are obtained in leading order from charged-kaon production in deep-inelastic scattering on the deuteron. The distributions are extracted from spin-averaged K± multiplicities, and from K± and inclusive double-spin asymmetries for scattering of polarized positrons by a polarized deuterium target. The shape of the momentum distribution is softer than that of the average of the over(u, ̄) and over(d, ̄) quarks. In the region of measurement 0.02 < x < 0.6 and Q2 > 1.0   GeV2, the helicity distribution is zero within experimental uncertainties.

Original languageEnglish (US)
Pages (from-to)446-450
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume666
Issue number5
DOIs
StatePublished - Sep 11 2008

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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