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Search for the Theta(+) pentaquark in the gamma d ->Lambda nK(+) reaction measured with the CLAS spectrometer

S Niccolai
M Mirazita
P Rossi
NA Baltzell
DS Carman
K Hicks
B McKinnon
T Mibe
S Stepanyan
DJ Tedeschi
G Adams
P Ambrozewicz
SA Pereira
M Anghinolfi
G Asryan
H Avakian
H Bagdasaryan
N Baillie
JP Ball
V Batourine
M Battaglieri
I Bedlinskiy
M Bektasoglu
M Bellis
N Benmouna
BL Berman
AS Biselli
S Boiarinov
S Bouchigny
R Bradford
D Branford
WJ Briscoe
WK Brooks
S Bultmann
VD Burkert
C Butuceanu
JR Calarco
SL Careccia
B Carnahan
S Chen
PL Cole
P Collins
P Coltharp
D Crabb
H Crannell
V Crede
JP Cummings
N Dashyan
PV Degtyarenko
R De Masi
A Deppman
E De Sanctis
A Deur
R DeVita
KV Dharmawardane
C Djalali
GE Dodge
J Donnelly
D Doughty
M Dugger
OP Dzyubak
H Egiyan
KS Egiyan
L El Fassi
L Elouadrhiri
P Eugenio
G Fedotov
G Feldman
H Funsten
M Garcon
G Gavalian
GP Gilfoyle
KL Giovanetti
FX Girod
JT Goetz
A Gonenc
CIO Gordon
RW Gothe
KA Griffioen
M Guidal
N Guler
L Guo
V Gyurjyan
C Hadjidakis
K Hafidi
H Hakobyan
RS Hakobyan
J Hardie
FW Hersman
I Hleiqawi
M Holtrop
CE Hyde-Wright
Y Ilieva
DG Ireland
BS Ishkhanov
EL Isupov
MM Ito
D Jenkins
HS Jo
K Joo
HG Juengst
JD Kellie
M Khandaker
W Kim
A Klein
FJ Klein
AV Klimenko
M Kossov
LH Kramer
V Kubarovsky
J Kuhn
SE Kuhn
SV Kuleshov
J Lachniet
J Langheinrich
D Lawrence
T Lee
J Li
K Livingston
H Lu
M MacCormick
N Markov
BA Mecking
J Mellor
JJ Melone
MD Mestayer
CA Meyer
K Mikhailov
R Minehart
R Miskimen
V Mokeev
L Morand
SA Morrow
M Moteabbed
GS Mutchler
P Nadel-Turonski
J Napolitano
R Nasseripour
G Niculescu
I Niculescu
BB Niczyporuk
MR Niroula
RA Niyazov
M Nozar
JD Echeimberg
M Osipenko
AI Ostrovidov
K Park
E Pasyuk
C Paterson
J Pierce
N Pivnyuk
D Pocanic
O Pogorelko
S Pozdniakov
BM Preedom
JW Price
Y Prok
D Protopopescu
BA Raue
G Riccardi
G Ricco
M Ripani
BG Ritchie
F Ronchetti
G Rosner
F Sabatie
C Salgado
JP Santoro
V Sapunenko
RA Schumacher
VS Serov
YG Sharabian
NV Shvedunov
ES Smith
LC Smith
DI Sober
A Stavinsky
SS Stepanyan
BE Stokes
P Stoler
II Strakovsky
S Strauch
M Taiuti
U Thoma
A Tkabladze
S Tkachenko
L Todor
C Tur
M Ungaro
MF Vineyard
AV Vlassov
DP Watts
LB Weinstein
DP Weygand
M Williams, University of Massachusetts - Amherst
E Wolin
MH Wood
A Yegneswaran
L Zana
J Zhang
B Zhao
Z Zhao

Article comments

Doi:10.1103/PhysRevLett.9 Copyright 2006 by The American Physical Society.

Abstract

For the first time, the reaction gamma d ->Lambda nK(+) has been analyzed in order to search for the exotic pentaquark baryon Theta(+)(1540). The data were taken at Jefferson Laboratory, using the Hall-B tagged-photon beam of energy between 0.8 and 3.6 GeV and the CEBAF Large Acceptance Spectrometer (CLAS). No statistically significant structures were observed in the nK(+) invariant-mass distribution. The upper limit on the gamma d ->Lambda Theta(+) integrated cross section has been calculated and found to be between 5 and 25 nb, depending on the production model assumed. The upper limit on the differential cross section is also reported.

Suggested Citation

S Niccolai, M Mirazita, P Rossi, NA Baltzell, DS Carman, K Hicks, B McKinnon, T Mibe, S Stepanyan, DJ Tedeschi, G Adams, P Ambrozewicz, SA Pereira, M Anghinolfi, G Asryan, H Avakian, H Bagdasaryan, N Baillie, JP Ball, V Batourine, M Battaglieri, I Bedlinskiy, M Bektasoglu, M Bellis, N Benmouna, BL Berman, AS Biselli, S Boiarinov, S Bouchigny, R Bradford, D Branford, WJ Briscoe, WK Brooks, S Bultmann, VD Burkert, C Butuceanu, JR Calarco, SL Careccia, B Carnahan, S Chen, PL Cole, P Collins, P Coltharp, D Crabb, H Crannell, V Crede, JP Cummings, N Dashyan, PV Degtyarenko, R De Masi, A Deppman, E De Sanctis, A Deur, R DeVita, KV Dharmawardane, C Djalali, GE Dodge, J Donnelly, D Doughty, M Dugger, OP Dzyubak, H Egiyan, KS Egiyan, L El Fassi, L Elouadrhiri, P Eugenio, G Fedotov, G Feldman, H Funsten, M Garcon, G Gavalian, GP Gilfoyle, KL Giovanetti, FX Girod, JT Goetz, A Gonenc, CIO Gordon, RW Gothe, KA Griffioen, M Guidal, N Guler, L Guo, V Gyurjyan, C Hadjidakis, K Hafidi, H Hakobyan, RS Hakobyan, J Hardie, FW Hersman, I Hleiqawi, M Holtrop, CE Hyde-Wright, Y Ilieva, DG Ireland, BS Ishkhanov, EL Isupov, MM Ito, D Jenkins, HS Jo, K Joo, HG Juengst, JD Kellie, M Khandaker, W Kim, A Klein, FJ Klein, AV Klimenko, M Kossov, LH Kramer, V Kubarovsky, J Kuhn, SE Kuhn, SV Kuleshov, J Lachniet, J Langheinrich, D Lawrence, T Lee, J Li, K Livingston, H Lu, M MacCormick, N Markov, BA Mecking, J Mellor, JJ Melone, MD Mestayer, CA Meyer, K Mikhailov, R Minehart, R Miskimen, V Mokeev, L Morand, SA Morrow, M Moteabbed, GS Mutchler, P Nadel-Turonski, J Napolitano, R Nasseripour, G Niculescu, I Niculescu, BB Niczyporuk, MR Niroula, RA Niyazov, M Nozar, JD Echeimberg, M Osipenko, AI Ostrovidov, K Park, E Pasyuk, C Paterson, J Pierce, N Pivnyuk, D Pocanic, O Pogorelko, S Pozdniakov, BM Preedom, JW Price, Y Prok, D Protopopescu, BA Raue, G Riccardi, G Ricco, M Ripani, BG Ritchie, F Ronchetti, G Rosner, F Sabatie, C Salgado, JP Santoro, V Sapunenko, RA Schumacher, VS Serov, YG Sharabian, NV Shvedunov, ES Smith, LC Smith, DI Sober, A Stavinsky, SS Stepanyan, BE Stokes, P Stoler, II Strakovsky, S Strauch, M Taiuti, U Thoma, A Tkabladze, S Tkachenko, L Todor, C Tur, M Ungaro, MF Vineyard, AV Vlassov, DP Watts, LB Weinstein, DP Weygand, M Williams, E Wolin, MH Wood, A Yegneswaran, L Zana, J Zhang, B Zhao, and Z Zhao. "Search for the Theta(+) pentaquark in the gamma d ->Lambda nK(+) reaction measured with the CLAS spectrometer" Physical Review Letters 97.3 (2006).
Available at: http://works.bepress.com/michael_williams/9