Pentaquark search with spatially non-trivial operators (I)

Ferenc Csikor; Zoltán Fodor; Sándor D. Katz; Tamás G. Kovács; Bálint C. Tóth

Pentaquark search with spatially non-trivial operators (I)

Ferenc Csikor, Zoltán Fodor, Sándor D. Katz, Tamás G. Kovács, Bálint C. Tóth

Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

We study spin 1/2 isoscalar and isovector, even and odd parity candidates for the Ȯ⁺(1540) pentaquark particle using large scale lattice QCD simulations. We utilise several possible wave functions (operators), including spatially non-trivial ones with unit orbital angular momentum. Linear combinations of those have a good chance of spanning both the scattering and the pentaquark states. We can clearly distinguish the lowest scattering state (s) in both parity channels up to above the expected location of the pentaquark, but we find no trace of the latter. Based on that we conclude that there are most probably no pentaquark bound states at our quark masses corresponding to m_π = 400-630 MeV. However, we cannot rule out the existence of a pentaquark state at the physical quark mass or pentaquarks with more exotic wave functions.

Original language	English (US)
Journal	Proceedings of Science
Volume	20
State	Published - 2005
Event	23rd International Symposium on Lattice Field Theory, LAT 2005 - Dublin, Ireland Duration: Jul 25 2005 → Jul 30 2005

All Science Journal Classification (ASJC) codes

General

Cite this

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title = "Pentaquark search with spatially non-trivial operators (I)",

abstract = "We study spin 1/2 isoscalar and isovector, even and odd parity candidates for the Ȯ+(1540) pentaquark particle using large scale lattice QCD simulations. We utilise several possible wave functions (operators), including spatially non-trivial ones with unit orbital angular momentum. Linear combinations of those have a good chance of spanning both the scattering and the pentaquark states. We can clearly distinguish the lowest scattering state (s) in both parity channels up to above the expected location of the pentaquark, but we find no trace of the latter. Based on that we conclude that there are most probably no pentaquark bound states at our quark masses corresponding to mπ = 400-630 MeV. However, we cannot rule out the existence of a pentaquark state at the physical quark mass or pentaquarks with more exotic wave functions.",

author = "Ferenc Csikor and Zolt{\'a}n Fodor and Katz, {S{\'a}ndor D.} and Kov{\'a}cs, {Tam{\'a}s G.} and T{\'o}th, {B{\'a}lint C.}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-ShareAlike Licence.; 23rd International Symposium on Lattice Field Theory, LAT 2005 ; Conference date: 25-07-2005 Through 30-07-2005",

year = "2005",

language = "English (US)",

volume = "20",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

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TY - JOUR

T1 - Pentaquark search with spatially non-trivial operators (I)

AU - Csikor, Ferenc

AU - Fodor, Zoltán

AU - Katz, Sándor D.

AU - Kovács, Tamás G.

AU - Tóth, Bálint C.

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-ShareAlike Licence.

PY - 2005

Y1 - 2005

N2 - We study spin 1/2 isoscalar and isovector, even and odd parity candidates for the Ȯ+(1540) pentaquark particle using large scale lattice QCD simulations. We utilise several possible wave functions (operators), including spatially non-trivial ones with unit orbital angular momentum. Linear combinations of those have a good chance of spanning both the scattering and the pentaquark states. We can clearly distinguish the lowest scattering state (s) in both parity channels up to above the expected location of the pentaquark, but we find no trace of the latter. Based on that we conclude that there are most probably no pentaquark bound states at our quark masses corresponding to mπ = 400-630 MeV. However, we cannot rule out the existence of a pentaquark state at the physical quark mass or pentaquarks with more exotic wave functions.

AB - We study spin 1/2 isoscalar and isovector, even and odd parity candidates for the Ȯ+(1540) pentaquark particle using large scale lattice QCD simulations. We utilise several possible wave functions (operators), including spatially non-trivial ones with unit orbital angular momentum. Linear combinations of those have a good chance of spanning both the scattering and the pentaquark states. We can clearly distinguish the lowest scattering state (s) in both parity channels up to above the expected location of the pentaquark, but we find no trace of the latter. Based on that we conclude that there are most probably no pentaquark bound states at our quark masses corresponding to mπ = 400-630 MeV. However, we cannot rule out the existence of a pentaquark state at the physical quark mass or pentaquarks with more exotic wave functions.

UR - http://www.scopus.com/inward/record.url?scp=85056828041&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056828041&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85056828041

SN - 1824-8039

VL - 20

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 23rd International Symposium on Lattice Field Theory, LAT 2005

Y2 - 25 July 2005 through 30 July 2005

ER -

Pentaquark search with spatially non-trivial operators (I)

Abstract

All Science Journal Classification (ASJC) codes

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