The exclusive reaction gammap-->K0K+n was studied in the photon energy range between 1.6 and 3.8 GeV searching for evidence of the exotic baryon Theta+ (1540)-->nK+. The decay to nK+requires the assignment of strangeness S=+1 to any observed resonance. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility corresponding to an integrated luminosity of 70 pb-1. No evidence for the Theta+ pentaquark was found. Upper limits were set on the production cross section as function of center-of-mass angle and nK+ mass. The 95% C.L. upper limit on the total cross section for a narrow resonance at 1540 MeV was found to be 0.8 nb.

Battaglieri, M

De Vita, R

Kubarovsky, V

Guo, L

Mutchler, GS

Stoler, P

Weygand, DP

Ambrozewicz, P

Anghinolfi, M

Asryan, G

Avakian, H

Bagdasaryan, H

Baillie, N

Ball, JP

Baltzell, NA

Batourine, V

Bedlinskiy, I

Bellis, M

Benmouna, N

Berman, BL

Biselli, AS

Bouchigny, S

Boiarinov, S

Bradford, R

Branford, D

Briscoe, WJ

Brooks, WK

Bültmann, S

Burkert, VD

Butuceanu, C

Calarco, JR

Careccia, SL

Carman, DS

Chen, S

Clinton, E

Cole, PL

Coltharp, P

Crabb, D

Crannell, H

Cummings, JP

Dale, D

De Sanctis, E

Degtyarenko, PV

Deur, A

Dharmawardane, KV

Djalali, C

Dodge, GE

Donnelly, J

Doughty, D

Dugger, M

Dzyubak, OP

Egiyan, H

Egiyan, KS

Elouadrhiri, L

Eugenio, P

Fedotov, G

Funsten, H

Gabrielyan, MY

Gan, L

Garçon, M

Gasparian, A

Gavalian, G

Gilfoyle, GP

Giovanetti, KL

Girod, FX

Glamazdin, O

Goett, J

Goetz, JT

Golovach, E

Gonenc, A

Gordon, CIO

Gothe, RW

Griffioen, KA

Guidal, M

Guler, N

Gyurjyan, V

Hadjidakis, C

Hakobyan, RS

Hardie, J

Hersman, FW

Hicks, K

Hleiqawi, I

Holtrop, Maurik

Hyde-Wright, CE

Ilieva, Y

Ireland, DG

Ishkhanov, BS

Ito, MM

Jenkins, D

Jo, HS

Joo, K

Juengst, HG

Kellie, JD

Khandaker, M

Kim, W

Klein, A

Klein, FJ

Klimenko, AV

Kossov, M

Kramer, LH

Kuhn, J

Kuhn, SE

Kuleshov, SV

Lachniet, J

Laget, JM

Langheinrich, J

Lawrence, D

Lee, T

Li, Ji

Livingston, K

McKinnon, B

Mecking, BA

Melone, JJ

Mestayer, MD

Meyer, CA

Mibe, T

Mikhailov, K

Minehart, R

Mirazita, M

Miskimen, R

Mochalov, V

Mokeev, V

Morand, L

Morrow, SA

Nadel-Turonski, P

Nakagawa, I

Nasseripour, R

Niccolai, S

Niculescu, G

Niculescu, I

Niczyporuk, BB

Niyazov, RA

Nozar, M

Osipenko, M

Ostrovidov, AI

Park, K

Pasyuk, E

Paterson, C

Pierce, J

Pivnyuk, N

Pocanic, D

Pogorelko, O

Pozdniakov, S

Price, JW

Prok, Y

Protopopescu, D

Raue, BA

Riccardi, G

Ricco, G

Ripani, M

Ritchie, BG

Ronchetti, F

Rosner, G

Rossi, P

Sabatié, F

Salgado, C

Santoro, JP

Sapunenko, V

Schumacher, RA

Serov, VS

Sharabian, YG

Smith, ES

Smith, LC

Sober, DI

Stavinsky, A

Stepanyan, SS

Stepanyan, S

Stokes, BE

Strakovsky, II

Strauch, S

Taiuti, M

Tedeschi, DJ

Teymurazyan, A

Thoma, U

Tkabladze, A

Tkachenko, S

Todor, L

Tur, C

Ungaro, M

Vineyard, MF

Vlassov, AV

Weinstein, LB

Williams, M

Wolin, E

Wood, MH

Yegneswaran, A

Zana, L

Zhang, J

Zhao, B

CLAS Collaboration

published 

February 3, 2006

General Physics

Physical Review Letters  Journal