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Search for pentaquarks in the hadronic decays of the Z boson with the DELPHI detector at LEP
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DELPHI Collaboration (Including:
). (2007) Search for pentaquarks in the hadronic decays of the Z boson with the DELPHI detector at LEP. Physics Letters B, Vol.653 (No.2-4). pp. 151-160. doi:10.1016/j.physletb.2007.08.005 ISSN 0370-2693.Research output not available from this repository.
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Official URL: http://dx.doi.org/10.1016/j.physletb.2007.08.005
Abstract
The quark model does not exclude states composed of more than three quarks, like pentaquark systems. Controversial evidence for such states has been published in the last years, in particular: for a strange pentaquark Theta(1540)(+); for a double-strange state, the Xi(1862)(--), subsequently called Phi(1860)--; and for a charmed state, the Theta(c)(3100)(0). If confirmed, a full pentaquark family might exist; such pentaquark states could be produced in e(+)e(-) annihilations near the Z energy. In this Letter a search for pentaquarks is described using the DELPHI detector at LEP, characterized by powerful particle identification sub-systems crucial in the separation of the signal from the background for these states. At 95% CL, upper limits are set on the production rates N of such particles and their charge-conjugate state per Z decay: N-Theta+ x Br(Theta(+) -> pK(S)(0)) < 5.1 x 10(-4), N Theta++ < 1.6 x 10(-3), N Phi(1860)-- x Br((P(1860)-- -> Xi(-)pi(-)) < 2.9 x 10(-4), N-Theta c(3100)0 x Br(Theta(c)(3100)(0) -> D*(+)p) < 8.8 x 10(-4). (c) 2007 Elsevier B.V. All rights reserved.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physics Letters B | ||||
| Publisher: | Elsevier Science BV | ||||
| ISSN: | 0370-2693 | ||||
| Official Date: | 30 September 2007 | ||||
| Dates: |
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| Volume: | Vol.653 | ||||
| Number: | No.2-4 | ||||
| Number of Pages: | 10 | ||||
| Page Range: | pp. 151-160 | ||||
| DOI: | 10.1016/j.physletb.2007.08.005 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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