Search for Dirac magnetic monopoles in e+e− collisions with the OPAL detector at LEP2

G Abbiendi; PJ Bell; David Charlton; Christopher Hawkes; Predrag Jovanovic; Peter Watkins; Alan Watson; Nigel Watson; John Wilson

doi:10.1016/j.physletb.2008.03.057

Search for Dirac magnetic monopoles in e+e− collisions with the OPAL detector at LEP2

G Abbiendi, PJ Bell, David Charlton, Christopher Hawkes, Predrag Jovanovic, Peter Watkins, Alan Watson, Nigel Watson, John Wilson

Physics and Astronomy

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Abstract

This Letter describes a direct search for pair produced magnetic monopoles in e(+)e(-) collisions. The analysis is based on 62.7 pb(-1) of data collected with the OPAL detector at an average centre-of-mass energy of root S = 206.3 GeV. The monopole signal was assumed to be characterized by two back-to-back particles with an anomalously high ionization energy loss dE/dx in the tracking chambers. No evidence for production of monopoles was observed. Upper limits were obtained on the magnetic monopole pair-production cross-section (sigma) in the mass range 45 GeV/c(2) <m(M) <102 GeV/c(2). The average limit is sigma <0.05 pb and is essentially independent of the magnetic monopole mass. The cross-section limit is derived at the 95% confidence level and is valid for spin-1/2 magnetic monopoles. (C) 2008 Published by Elsevier B.V.

Original language	English
Pages (from-to)	37-42
Number of pages	6
Journal	Physics Letters B
Volume	663
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2008.03.057
Publication status	Published - 15 May 2008

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title = "Search for Dirac magnetic monopoles in e+e− collisions with the OPAL detector at LEP2",

abstract = "This Letter describes a direct search for pair produced magnetic monopoles in e(+)e(-) collisions. The analysis is based on 62.7 pb(-1) of data collected with the OPAL detector at an average centre-of-mass energy of root S = 206.3 GeV. The monopole signal was assumed to be characterized by two back-to-back particles with an anomalously high ionization energy loss dE/dx in the tracking chambers. No evidence for production of monopoles was observed. Upper limits were obtained on the magnetic monopole pair-production cross-section (sigma) in the mass range 45 GeV/c(2) <m(M) <102 GeV/c(2). The average limit is sigma <0.05 pb and is essentially independent of the magnetic monopole mass. The cross-section limit is derived at the 95% confidence level and is valid for spin-1/2 magnetic monopoles. (C) 2008 Published by Elsevier B.V.",

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T1 - Search for Dirac magnetic monopoles in e+e− collisions with the OPAL detector at LEP2

AU - Abbiendi, G

AU - Bell, PJ

AU - Charlton, David

AU - Hawkes, Christopher

AU - Jovanovic, Predrag

AU - Watkins, Peter

AU - Watson, Alan

AU - Watson, Nigel

AU - Wilson, John

PY - 2008/5/15

Y1 - 2008/5/15

N2 - This Letter describes a direct search for pair produced magnetic monopoles in e(+)e(-) collisions. The analysis is based on 62.7 pb(-1) of data collected with the OPAL detector at an average centre-of-mass energy of root S = 206.3 GeV. The monopole signal was assumed to be characterized by two back-to-back particles with an anomalously high ionization energy loss dE/dx in the tracking chambers. No evidence for production of monopoles was observed. Upper limits were obtained on the magnetic monopole pair-production cross-section (sigma) in the mass range 45 GeV/c(2) <m(M) <102 GeV/c(2). The average limit is sigma <0.05 pb and is essentially independent of the magnetic monopole mass. The cross-section limit is derived at the 95% confidence level and is valid for spin-1/2 magnetic monopoles. (C) 2008 Published by Elsevier B.V.

AB - This Letter describes a direct search for pair produced magnetic monopoles in e(+)e(-) collisions. The analysis is based on 62.7 pb(-1) of data collected with the OPAL detector at an average centre-of-mass energy of root S = 206.3 GeV. The monopole signal was assumed to be characterized by two back-to-back particles with an anomalously high ionization energy loss dE/dx in the tracking chambers. No evidence for production of monopoles was observed. Upper limits were obtained on the magnetic monopole pair-production cross-section (sigma) in the mass range 45 GeV/c(2) <m(M) <102 GeV/c(2). The average limit is sigma <0.05 pb and is essentially independent of the magnetic monopole mass. The cross-section limit is derived at the 95% confidence level and is valid for spin-1/2 magnetic monopoles. (C) 2008 Published by Elsevier B.V.

U2 - 10.1016/j.physletb.2008.03.057

DO - 10.1016/j.physletb.2008.03.057

M3 - Article

VL - 663

SP - 37

EP - 42

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

Search for Dirac magnetic monopoles in e+e− collisions with the OPAL detector at LEP2

Abstract

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