Strangeness suppression of qq creation observed in exclusive reactions

M D Mestayer¹, K Park¹, K P Adhikari², M Aghasyan³, S Anefalos Pereira³, J Ball⁴, M Battaglieri⁵, V Batourine¹, I Bedlinskiy⁶, A S Biselli⁷, S Boiarinov¹, W J Briscoe⁸, W K Brooks⁹, V D Burkert¹, D S Carman¹, A Celentano⁵, S Chandavar¹⁰, G Charles¹¹, L Colaneri¹², P L Cole¹³, M Contalbrigo¹⁴, O Cortes¹⁵, V Crede¹⁶, A D'Angelo¹², N Dashyan¹⁷, R De Vita⁵, A Deur¹, C Djalali¹⁸, D Doughty¹⁹, R Dupre¹¹, A El Alaoui²⁰, L El Fassi², L Elouadrhiri¹, P Eugenio¹⁶, G Fedotov²¹, J A Fleming²², T A Forest¹⁵, B Garillon¹¹, M Garçon⁴, Y Ghandilyan¹⁷, G P Gilfoyle²³, K L Giovanetti²⁴, F X Girod¹, J T Goetz¹⁰, E Golovatch²⁵, R W Gothe¹⁸, K A Griffioen²⁶, B Guegan¹¹, M Guidal¹¹, H Hakobyan²⁷, C Hanretty²⁸, M Hattawy¹¹, M Holtrop²⁹, S M Hughes²², C E Hyde², Y Ilieva³⁰, D G Ireland³¹, H Jiang¹⁸, H S Jo¹¹, K Joo³², D Keller²⁸, M Khandaker³³, A Kim³⁴, W Kim³⁴, S Koirala², V Kubarovsky³⁵, S V Kuleshov³⁶, P Lenisa¹⁴, W I Levine³⁷, K Livingston³¹, H Y Lu¹⁸, I J D MacGregor³¹, M Mayer², B McKinnon³¹, C A Meyer³⁷, M Mirazita³, V Mokeev³⁸, R A Montgomery³, C I Moody²⁰, H Moutarde⁴, A Movsisyan¹⁴, C Munoz Camacho¹¹, P Nadel-Turonski¹, S Niccolai³⁹, G Niculescu⁴⁰, I Niculescu²⁴, M Osipenko⁵, A I Ostrovidov¹⁶, L L Pappalardo¹⁴, R Paremuzyan¹⁷, P Peng²⁸, W Phelps⁴¹, S Pisano³, O Pogorelko⁶, S Pozdniakov⁶, J W Price⁴², D Protopopescu³¹, A J R Puckett³², B A Raue⁴³, D Rimal⁴¹, M Ripani⁵, A Rizzo⁴⁴, G Rosner³¹, P Roy¹⁶, F Sabatié⁴, M S Saini¹⁶, D Schott⁸, R A Schumacher³⁷, A Simonyan¹⁷, D Sokhan³¹, S Strauch³⁰, V Sytnik⁴⁵, W Tang¹⁰, Ye Tian¹⁸, M Ungaro³⁵, B Vernarsky³⁷, A V Vlassov⁶, H Voskanyan¹⁷, E Voutier⁴⁶, N K Walford⁴⁷, D P Watts²², X Wei¹, L B Weinstein², M H Wood⁴⁸, N Zachariou¹⁸, J Zhang¹, Z W Zhao²⁸, I Zonta⁴⁴; CLAS Collaboration

Affiliations

¹ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
² Old Dominion University, Norfolk, Virginia 23529, USA.
³ INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
⁴ CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France.
⁵ INFN, Sezione di Genova, 16146 Genova, Italy.
⁶ Institute of Theoretical and Experimental Physics, Moscow 117259, Russia.
⁷ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA and Fairfield University, Fairfield, Connecticut 06824, USA.
⁸ The George Washington University, Washington, D.C. 20052, USA.
⁹ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
¹⁰ Ohio University, Athens, Ohio 45701, USA.
¹¹ Institut de Physique Nucléaire ORSAY, Orsay, France.
¹² INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy and Universita' di Roma Tor Vergata, 00133 Rome, Italy.
¹³ Idaho State University, Pocatello, Idaho 83209, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
¹⁴ INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
¹⁵ Idaho State University, Pocatello, Idaho 83209, USA.
¹⁶ Florida State University, Tallahassee, Florida 32306, USA.
¹⁷ Yerevan Physics Institute, 375036 Yerevan, Armenia.
¹⁸ University of South Carolina, Columbia, South Carolina 29208, USA.
¹⁹ Christopher Newport University, Newport News, Virginia 23606, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
²⁰ Argonne National Laboratory, Argonne, Illinois 60439, USA.
²¹ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia and University of South Carolina, Columbia, South Carolina 29208, USA.
²² Edinburgh University, Edinburgh EH9 3JZ, United Kingdom.
²³ University of Richmond, Richmond, Virginia 23173, USA.
²⁴ James Madison University, Harrisonburg, Virginia 22807, USA.
²⁵ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
²⁶ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
²⁷ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile and Yerevan Physics Institute, 375036 Yerevan, Armenia.
²⁸ University of Virginia, Charlottesville, Virginia 22901, USA.
²⁹ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³⁰ The George Washington University, Washington, D.C. 20052, USA and University of South Carolina, Columbia, South Carolina 29208, USA.
³¹ University of Glasgow, Glasgow G12 8QQ, United Kingdom.
³² University of Connecticut, Storrs, Connecticut 06269, USA.
³³ Idaho State University, Pocatello, Idaho 83209, USA and Norfolk State University, Norfolk, Virginia 23504, USA.
³⁴ Kyungpook National University, Daegu 702-701, Republic of Korea.
³⁵ Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
³⁶ Institute of Theoretical and Experimental Physics, Moscow 117259, Russia and Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
³⁷ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
³⁸ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
³⁹ The George Washington University, Washington, D.C. 20052, USA and Institut de Physique Nucléaire ORSAY, Orsay, France.
⁴⁰ James Madison University, Harrisonburg, Virginia 22807, USA and Ohio University, Athens, Ohio 45701, USA.
⁴¹ Florida International University, Miami, Florida 33199, USA.
⁴² California State University, Dominguez Hills, Carson, California 90747, USA and Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA.
⁴³ Florida International University, Miami, Florida 33199, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
⁴⁴ INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
⁴⁵ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
⁴⁶ LPSC, Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France.
⁴⁷ Catholic University of America, Washington, D.C. 20064, USA.
⁴⁸ Canisius College, Buffalo, New York 14208, USA and University of South Carolina, Columbia, South Carolina 29208, USA.

PMID: 25375706
DOI: 10.1103/PhysRevLett.113.152004

Strangeness suppression of qq creation observed in exclusive reactions

M D Mestayer et al. Phys Rev Lett. 2014.

. 2014 Oct 10;113(15):152004.

doi: 10.1103/PhysRevLett.113.152004. Epub 2014 Oct 10.

Authors

Affiliations

¹ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
² Old Dominion University, Norfolk, Virginia 23529, USA.
³ INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
⁴ CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France.
⁵ INFN, Sezione di Genova, 16146 Genova, Italy.
⁶ Institute of Theoretical and Experimental Physics, Moscow 117259, Russia.
⁷ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA and Fairfield University, Fairfield, Connecticut 06824, USA.
⁸ The George Washington University, Washington, D.C. 20052, USA.
⁹ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
¹⁰ Ohio University, Athens, Ohio 45701, USA.
¹¹ Institut de Physique Nucléaire ORSAY, Orsay, France.
¹² INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy and Universita' di Roma Tor Vergata, 00133 Rome, Italy.
¹³ Idaho State University, Pocatello, Idaho 83209, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
¹⁴ INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
¹⁵ Idaho State University, Pocatello, Idaho 83209, USA.
¹⁶ Florida State University, Tallahassee, Florida 32306, USA.
¹⁷ Yerevan Physics Institute, 375036 Yerevan, Armenia.
¹⁸ University of South Carolina, Columbia, South Carolina 29208, USA.
¹⁹ Christopher Newport University, Newport News, Virginia 23606, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
²⁰ Argonne National Laboratory, Argonne, Illinois 60439, USA.
²¹ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia and University of South Carolina, Columbia, South Carolina 29208, USA.
²² Edinburgh University, Edinburgh EH9 3JZ, United Kingdom.
²³ University of Richmond, Richmond, Virginia 23173, USA.
²⁴ James Madison University, Harrisonburg, Virginia 22807, USA.
²⁵ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
²⁶ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
²⁷ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile and Yerevan Physics Institute, 375036 Yerevan, Armenia.
²⁸ University of Virginia, Charlottesville, Virginia 22901, USA.
²⁹ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³⁰ The George Washington University, Washington, D.C. 20052, USA and University of South Carolina, Columbia, South Carolina 29208, USA.
³¹ University of Glasgow, Glasgow G12 8QQ, United Kingdom.
³² University of Connecticut, Storrs, Connecticut 06269, USA.
³³ Idaho State University, Pocatello, Idaho 83209, USA and Norfolk State University, Norfolk, Virginia 23504, USA.
³⁴ Kyungpook National University, Daegu 702-701, Republic of Korea.
³⁵ Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
³⁶ Institute of Theoretical and Experimental Physics, Moscow 117259, Russia and Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
³⁷ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
³⁸ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
³⁹ The George Washington University, Washington, D.C. 20052, USA and Institut de Physique Nucléaire ORSAY, Orsay, France.
⁴⁰ James Madison University, Harrisonburg, Virginia 22807, USA and Ohio University, Athens, Ohio 45701, USA.
⁴¹ Florida International University, Miami, Florida 33199, USA.
⁴² California State University, Dominguez Hills, Carson, California 90747, USA and Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA.
⁴³ Florida International University, Miami, Florida 33199, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
⁴⁴ INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
⁴⁵ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
⁴⁶ LPSC, Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France.
⁴⁷ Catholic University of America, Washington, D.C. 20064, USA.
⁴⁸ Canisius College, Buffalo, New York 14208, USA and University of South Carolina, Columbia, South Carolina 29208, USA.

PMID: 25375706
DOI: 10.1103/PhysRevLett.113.152004

Abstract

We measured the ratios of electroproduction cross sections from a proton target for three exclusive meson-baryon final states: ΛK(+), pπ(0), and nπ(+), with the CLAS detector at Jefferson Lab. Using a simple model of quark hadronization, we extract qq creation probabilities for the first time in exclusive two-body production, in which only a single qq pair is created. We observe a sizable suppression of strange quark-antiquark pairs compared to nonstrange pairs, similar to that seen in high-energy production.

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Strangeness suppression of qq creation observed in exclusive reactions

Affiliations

Strangeness suppression of qq creation observed in exclusive reactions

Authors

Affiliations

Abstract

LinkOut - more resources

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