Search for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mi>Σ</mml:mi><mml:mrow><mml:mn>5</mml:mn></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msubsup><mml:mo>,</mml:mo><mml:msubsup><mml:mi>N</mml:mi><mml:mrow><mml:mn>5</mml:mn></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msubsup></mml:mrow></mml:math>, and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>Θ</mml:mi><mml:mrow><mml:mo>+</mml:mo><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>pentaquark states
Y. QiangMassachusetts Institute of Technology, Cambridge, United StatesJ. R. M. AnnandUniversity of Glasgow, Glasgow, United KingdomJ. ArringtonArgonne National Laboratory, Lemont, United StatesYa. I. AzimovW. BertozziMassachusetts Institute of Technology, Cambridge, United StatesG. D. CatesUniversity of Virginia, Charlottesville, United StatesJ. P. ChenThomas Jefferson National Accelerator Facility, Newport News, United StatesSeonho ChoiTemple University, Philadelphia, United StatesE. ChudakovThomas Jefferson National Accelerator Facility, Newport News, United StatesF. CusannoINFN/Sanita, Rome, ItalyC. W. de JagerThomas Jefferson National Accelerator Facility, Newport News, United StatesM. EpsteinCalifornia State University Los Angeles, Los Angeles, United StatesR. J. FeuerbachThomas Jefferson National Accelerator Facility, Newport News, United StatesF. GaribaldiINFN/Sanita, Rome, ItalyO. GayouMassachusetts Institute of Technology, Cambridge, United StatesR. GilmanRutgers, The State University of New Jersey, Piscataway, NJ 08854 USAJ. GómezThomas Jefferson National Accelerator Facility, Newport News, United StatesD. HamiltonUniversity of Glasgow, Glasgow, United KingdomO. HansenThomas Jefferson National Accelerator Facility, Newport News, United StatesD. W. HiginbothamThomas Jefferson National Accelerator Facility, Newport News, United StatesT. HolmstromWilliam & Mary, Williamsburg, United StatesM. IodiceX. S. JiangRutgers, The State University of New Jersey, New Brunswick, United StatesM. JonesThomas Jefferson National Accelerator Facility, Newport News, United StatesJ. J. LeRoseThomas Jefferson National Accelerator Facility, Newport News, United StatesR. LindgrenUniversity of Virginia, Charlottesville, United StatesN. LiyanageUniversity of Virginia, Charlottesville, United StatesD. J. MargaziotisCalifornia State University Los Angeles, Los Angeles, United StatesP. MarkowitzFlorida International University, Miami, United StatesV. MamyanAlikhanyan National Laboratory, Yerevan, ArmeniaR. MichaelsThomas Jefferson National Accelerator Facility, Newport News, United StatesZ.-E. MezianiTemple University, Philadelphia, United StatesPeter MonaghanMassachusetts Institute of Technology, Cambridge, United StatesC. Muñoz-CamachoSACLAY, Gif-Sur-Yvette, FranceV. NelyubinUniversity of Virginia, Charlottesville, United StatesK. PaschkeUniversity of Massachusetts Amherst, Amherst Center, United StatesE. PiasetzkyTel Aviv University, Tel Aviv, IsraelI. A. RachekBudker Institute of Nuclear Physics, Novosibirsk, RussiaP. E. ReimerArgonne National Laboratory, Lemont, United StatesJ. ReinholdFlorida International University, Miami, United StatesB. ReitzThomas Jefferson National Accelerator Facility, Newport News, United StatesR. RochéFlorida State University, Tallahassee, United StatesA. SahaThomas Jefferson National Accelerator Facility, Newport News, United StatesA. SartySaint Mary's University, Halifax, CanadaEva C. SchulteArgonne National Laboratory, Lemont, United StatesA. ShahinyanAlikhanyan National Laboratory, Yerevan, ArmeniaR. SheyorTel Aviv University, Tel Aviv, IsraelJaideep SinghUniversity of Virginia, Charlottesville, United StatesI. I. StrakovskyGeorge Washington University, Washington, United StatesR. SubediKent State University, Kent, United StatesR. SuleimanMassachusetts Institute of Technology, Cambridge, United StatesV. SulkovskyWilliam & Mary, Williamsburg, United StatesB. WojtsekhowskiThomas Jefferson National Accelerator Facility, Newport News, United StatesXiaochao ZhengArgonne National Laboratory, Lemont, United States
2007lv
ABI
Аннотация
A high-resolution (sigma_instr. = 1.5 MeV) search for narrow states (Gamma < 10 MeV) with masses of M_x approx 1500-1850 MeV in ep -> e'K^+ X, e'K^- X and e' pi^+ X electroproduction at small angles and low Q^2 was performed. These states would be candidate partner states of the reported Theta^+(1540) pentaquark. No statistically significant signal was observed in any of the channels at 90% C.L. Upper limits on forward production were determined to be between 0.7% and 4.2% of the Lambda(1520) production cross section, depending on the channel and the assumed mass and width of the state.
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Цитирования и источники
Цитирований: 2Использованных источников: 0