Strangeness suppression of qq creation observed in exclusive reactions.
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.
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
M D
MD
Mestayer
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
K
K
Park
Old Dominion University, Norfolk, Virginia 23529, USA.
K P
KP
Adhikari
INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
M
M
Aghasyan
INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
S Anefalos
SA
Pereira
CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France.
J
J
Ball
INFN, Sezione di Genova, 16146 Genova, Italy.
M
M
Battaglieri
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
V
V
Batourine
Institute of Theoretical and Experimental Physics, Moscow 117259, Russia.
I
I
Bedlinskiy
Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA and Fairfield University, Fairfield, Connecticut 06824, USA.
A S
AS
Biselli
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
S
S
Boiarinov
The George Washington University, Washington, D.C. 20052, USA.
W J
WJ
Briscoe
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
W K
WK
Brooks
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
V D
VD
Burkert
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
D S
DS
Carman
INFN, Sezione di Genova, 16146 Genova, Italy.
A
A
Celentano
Ohio University, Athens, Ohio 45701, USA.
S
S
Chandavar
Institut de Physique Nucléaire ORSAY, Orsay, France.
G
G
Charles
INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy and Universita' di Roma Tor Vergata, 00133 Rome, Italy.
L
L
Colaneri
Idaho State University, Pocatello, Idaho 83209, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
P L
PL
Cole
INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
M
M
Contalbrigo
Idaho State University, Pocatello, Idaho 83209, USA.
O
O
Cortes
Florida State University, Tallahassee, Florida 32306, USA.
V
V
Crede
INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy and Universita' di Roma Tor Vergata, 00133 Rome, Italy.
A
A
D'Angelo
Yerevan Physics Institute, 375036 Yerevan, Armenia.
N
N
Dashyan
INFN, Sezione di Genova, 16146 Genova, Italy.
R
R
De Vita
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
A
A
Deur
University of South Carolina, Columbia, South Carolina 29208, USA.
C
C
Djalali
Christopher Newport University, Newport News, Virginia 23606, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
D
D
Doughty
Institut de Physique Nucléaire ORSAY, Orsay, France.
R
R
Dupre
Argonne National Laboratory, Argonne, Illinois 60439, USA.
A
A
El Alaoui
Old Dominion University, Norfolk, Virginia 23529, USA.
L
L
El Fassi
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
L
L
Elouadrhiri
Florida State University, Tallahassee, Florida 32306, USA.
P
P
Eugenio
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia and University of South Carolina, Columbia, South Carolina 29208, USA.
G
G
Fedotov
Edinburgh University, Edinburgh EH9 3JZ, United Kingdom.
J A
JA
Fleming
Idaho State University, Pocatello, Idaho 83209, USA.
T A
TA
Forest
Institut de Physique Nucléaire ORSAY, Orsay, France.
B
B
Garillon
CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France.
M
M
Garçon
Yerevan Physics Institute, 375036 Yerevan, Armenia.
Y
Y
Ghandilyan
University of Richmond, Richmond, Virginia 23173, USA.
G P
GP
Gilfoyle
James Madison University, Harrisonburg, Virginia 22807, USA.
K L
KL
Giovanetti
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
F X
FX
Girod
Ohio University, Athens, Ohio 45701, USA.
J T
JT
Goetz
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
E
E
Golovatch
University of South Carolina, Columbia, South Carolina 29208, USA.
R W
RW
Gothe
College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
K A
KA
Griffioen
Institut de Physique Nucléaire ORSAY, Orsay, France.
B
B
Guegan
Institut de Physique Nucléaire ORSAY, Orsay, France.
M
M
Guidal
Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile and Yerevan Physics Institute, 375036 Yerevan, Armenia.
H
H
Hakobyan
University of Virginia, Charlottesville, Virginia 22901, USA.
C
C
Hanretty
Institut de Physique Nucléaire ORSAY, Orsay, France.
M
M
Hattawy
University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
M
M
Holtrop
Edinburgh University, Edinburgh EH9 3JZ, United Kingdom.
S M
SM
Hughes
Old Dominion University, Norfolk, Virginia 23529, USA.
C E
CE
Hyde
The George Washington University, Washington, D.C. 20052, USA and University of South Carolina, Columbia, South Carolina 29208, USA.
Y
Y
Ilieva
University of Glasgow, Glasgow G12 8QQ, United Kingdom.
D G
DG
Ireland
University of South Carolina, Columbia, South Carolina 29208, USA.
H
H
Jiang
Institut de Physique Nucléaire ORSAY, Orsay, France.
H S
HS
Jo
University of Connecticut, Storrs, Connecticut 06269, USA.
K
K
Joo
University of Virginia, Charlottesville, Virginia 22901, USA.
D
D
Keller
Idaho State University, Pocatello, Idaho 83209, USA and Norfolk State University, Norfolk, Virginia 23504, USA.
M
M
Khandaker
Kyungpook National University, Daegu 702-701, Republic of Korea.
A
A
Kim
Kyungpook National University, Daegu 702-701, Republic of Korea.
W
W
Kim
Old Dominion University, Norfolk, Virginia 23529, USA.
S
S
Koirala
Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
V
V
Kubarovsky
Institute of Theoretical and Experimental Physics, Moscow 117259, Russia and Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
S V
SV
Kuleshov
INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
P
P
Lenisa
Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
W I
WI
Levine
University of Glasgow, Glasgow G12 8QQ, United Kingdom.
K
K
Livingston
University of South Carolina, Columbia, South Carolina 29208, USA.
H Y
HY
Lu
University of Glasgow, Glasgow G12 8QQ, United Kingdom.
I J D
IJ
MacGregor
Old Dominion University, Norfolk, Virginia 23529, USA.
M
M
Mayer
University of Glasgow, Glasgow G12 8QQ, United Kingdom.
B
B
McKinnon
Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
C A
CA
Meyer
INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
M
M
Mirazita
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
V
V
Mokeev
INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
R A
RA
Montgomery
Argonne National Laboratory, Argonne, Illinois 60439, USA.
C I
CI
Moody
CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France.
H
H
Moutarde
INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
A
A
Movsisyan
Institut de Physique Nucléaire ORSAY, Orsay, France.
C Munoz
CM
Camacho
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
P
P
Nadel-Turonski
The George Washington University, Washington, D.C. 20052, USA and Institut de Physique Nucléaire ORSAY, Orsay, France.
S
S
Niccolai
James Madison University, Harrisonburg, Virginia 22807, USA and Ohio University, Athens, Ohio 45701, USA.
G
G
Niculescu
James Madison University, Harrisonburg, Virginia 22807, USA.
I
I
Niculescu
INFN, Sezione di Genova, 16146 Genova, Italy.
M
M
Osipenko
Florida State University, Tallahassee, Florida 32306, USA.
A I
AI
Ostrovidov
INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
L L
LL
Pappalardo
Yerevan Physics Institute, 375036 Yerevan, Armenia.
R
R
Paremuzyan
University of Virginia, Charlottesville, Virginia 22901, USA.
P
P
Peng
Florida International University, Miami, Florida 33199, USA.
W
W
Phelps
INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
S
S
Pisano
Institute of Theoretical and Experimental Physics, Moscow 117259, Russia.
O
O
Pogorelko
Institute of Theoretical and Experimental Physics, Moscow 117259, Russia.
S
S
Pozdniakov
California State University, Dominguez Hills, Carson, California 90747, USA and Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA.
J W
JW
Price
University of Glasgow, Glasgow G12 8QQ, United Kingdom.
D
D
Protopopescu
University of Connecticut, Storrs, Connecticut 06269, USA.
A J R
AJ
Puckett
Florida International University, Miami, Florida 33199, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
B A
BA
Raue
Florida International University, Miami, Florida 33199, USA.
D
D
Rimal
INFN, Sezione di Genova, 16146 Genova, Italy.
M
M
Ripani
INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
A
A
Rizzo
University of Glasgow, Glasgow G12 8QQ, United Kingdom.
G
G
Rosner
Florida State University, Tallahassee, Florida 32306, USA.
P
P
Roy
CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France.
F
F
Sabatié
Florida State University, Tallahassee, Florida 32306, USA.
M S
MS
Saini
The George Washington University, Washington, D.C. 20052, USA.
D
D
Schott
Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
R A
RA
Schumacher
Yerevan Physics Institute, 375036 Yerevan, Armenia.
A
A
Simonyan
University of Glasgow, Glasgow G12 8QQ, United Kingdom.
D
D
Sokhan
The George Washington University, Washington, D.C. 20052, USA and University of South Carolina, Columbia, South Carolina 29208, USA.
S
S
Strauch
Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
V
V
Sytnik
Ohio University, Athens, Ohio 45701, USA.
W
W
Tang
University of South Carolina, Columbia, South Carolina 29208, USA.
Ye
Y
Tian
Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
M
M
Ungaro
Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
B
B
Vernarsky
Institute of Theoretical and Experimental Physics, Moscow 117259, Russia.
A V
AV
Vlassov
Yerevan Physics Institute, 375036 Yerevan, Armenia.
H
H
Voskanyan
LPSC, Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France.
E
E
Voutier
Catholic University of America, Washington, D.C. 20064, USA.
N K
NK
Walford
Edinburgh University, Edinburgh EH9 3JZ, United Kingdom.
D P
DP
Watts
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
X
X
Wei
Old Dominion University, Norfolk, Virginia 23529, USA.
L B
LB
Weinstein
Canisius College, Buffalo, New York 14208, USA and University of South Carolina, Columbia, South Carolina 29208, USA.
M H
MH
Wood
University of South Carolina, Columbia, South Carolina 29208, USA.
N
N
Zachariou
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
J
J
Zhang
University of Virginia, Charlottesville, Virginia 22901, USA.
Z W
ZW
Zhao
INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
I
I
Zonta