Search for heavy charged particles and for particles with anomalous charge in e+e- collisions at LEP

OPAL Collaboration

doi:10.1007/BF01571281

Search for heavy charged particles and for particles with anomalous charge in e⁺e^- collisions at LEP

OPAL Collaboration

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

Using the OPAL data accumulated in 1991-1993 amounting to 74 pb^-1 of integrated luminosity, corresponding to 1.64×10⁶ selected multi-hadronic events, a search has been performed for charged particles with unusual mass or unusual charge. The mass was determined from a combination of momentum and ionization energy loss measurements. No isolation criteria were applied to the tracks examined, so that both isolated particles and particles produced in jets were valid candidates. For particles with charge Q/e=-1, one candidate with a mass of approximately 4.2 GeV/c² was found, which is compatible with the background rate expected according to a Monte Carlo simulation. The implications of this search for the mass limits of a conjectured stable or quasi-stable charged gluino composite {Mathematical expression} are discussed. Limits are also presented for the production of fractionally-charged particles with Q/e=±2/3 and ±4/3 as well as for particles with Q/e=±2.

Original language	English
Pages (from-to)	203-211
Number of pages	9
Journal	European Physical Journal C
Volume	67
Issue number	2
DOIs	https://doi.org/10.1007/BF01571281
State	Published - 1 Jun 1995
Externally published	Yes

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1007/BF01571281

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@article{7e3a79ba00dc4968bc419b4432ceaf65,

title = "Search for heavy charged particles and for particles with anomalous charge in e+e- collisions at LEP",

abstract = "Using the OPAL data accumulated in 1991-1993 amounting to 74 pb-1 of integrated luminosity, corresponding to 1.64×106 selected multi-hadronic events, a search has been performed for charged particles with unusual mass or unusual charge. The mass was determined from a combination of momentum and ionization energy loss measurements. No isolation criteria were applied to the tracks examined, so that both isolated particles and particles produced in jets were valid candidates. For particles with charge Q/e=-1, one candidate with a mass of approximately 4.2 GeV/c2 was found, which is compatible with the background rate expected according to a Monte Carlo simulation. The implications of this search for the mass limits of a conjectured stable or quasi-stable charged gluino composite {Mathematical expression} are discussed. Limits are also presented for the production of fractionally-charged particles with Q/e=±2/3 and ±4/3 as well as for particles with Q/e=±2.",

author = "{OPAL Collaboration} and R. Akers and G. Alexander and J. Allison and K. Ametewee and Anderson, {K. J.} and S. Arcelli and S. Asai and D. Axen and G. Azuelos and Ball, {A. H.} and E. Barberio and Barlow, {R. J.} and R. Bartoldus and Batley, {J. R.} and G. Beaudoin and A. Beck and Beck, {G. A.} and C. Beeston and T. Behnke and Bell, {K. W.} and G. Bella and S. Bentvelsen and P. Berlich and S. Bethke and O. Biebel and Bloodworth, {I. J.} and P. Bock and Bosch, {H. M.} and M. Boutemeur and S. Braibant and P. Bright-Thomas and Brown, {R. M.} and A. Buijs and Burckhart, {H. J.} and R. B{\"u}rgin and C. Burgard and N. Capdevielle and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and C. Charlesworth and Charlton, {D. G.} and Chu, {S. L.} and Clarke, {P. E.L.} and Clayton, {J. C.} and Clowes, {S. G.} and I. Cohen and R. Folman",

year = "1995",

month = jun,

day = "1",

doi = "10.1007/BF01571281",

language = "English",

volume = "67",

pages = "203--211",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "2",

}

TY - JOUR

T1 - Search for heavy charged particles and for particles with anomalous charge in e+e- collisions at LEP

AU - OPAL Collaboration

AU - Akers, R.

AU - Alexander, G.

AU - Allison, J.

AU - Ametewee, K.

AU - Anderson, K. J.

AU - Arcelli, S.

AU - Asai, S.

AU - Axen, D.

AU - Azuelos, G.

AU - Ball, A. H.

AU - Barberio, E.

AU - Barlow, R. J.

AU - Bartoldus, R.

AU - Batley, J. R.

AU - Beaudoin, G.

AU - Beck, A.

AU - Beck, G. A.

AU - Beeston, C.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bella, G.

AU - Bentvelsen, S.

AU - Berlich, P.

AU - Bethke, S.

AU - Biebel, O.

AU - Bloodworth, I. J.

AU - Bock, P.

AU - Bosch, H. M.

AU - Boutemeur, M.

AU - Braibant, S.

AU - Bright-Thomas, P.

AU - Brown, R. M.

AU - Buijs, A.

AU - Burckhart, H. J.

AU - Bürgin, R.

AU - Burgard, C.

AU - Capdevielle, N.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlesworth, C.

AU - Charlton, D. G.

AU - Chu, S. L.

AU - Clarke, P. E.L.

AU - Clayton, J. C.

AU - Clowes, S. G.

AU - Cohen, I.

AU - Folman, R.

PY - 1995/6/1

Y1 - 1995/6/1

N2 - Using the OPAL data accumulated in 1991-1993 amounting to 74 pb-1 of integrated luminosity, corresponding to 1.64×106 selected multi-hadronic events, a search has been performed for charged particles with unusual mass or unusual charge. The mass was determined from a combination of momentum and ionization energy loss measurements. No isolation criteria were applied to the tracks examined, so that both isolated particles and particles produced in jets were valid candidates. For particles with charge Q/e=-1, one candidate with a mass of approximately 4.2 GeV/c2 was found, which is compatible with the background rate expected according to a Monte Carlo simulation. The implications of this search for the mass limits of a conjectured stable or quasi-stable charged gluino composite {Mathematical expression} are discussed. Limits are also presented for the production of fractionally-charged particles with Q/e=±2/3 and ±4/3 as well as for particles with Q/e=±2.

AB - Using the OPAL data accumulated in 1991-1993 amounting to 74 pb-1 of integrated luminosity, corresponding to 1.64×106 selected multi-hadronic events, a search has been performed for charged particles with unusual mass or unusual charge. The mass was determined from a combination of momentum and ionization energy loss measurements. No isolation criteria were applied to the tracks examined, so that both isolated particles and particles produced in jets were valid candidates. For particles with charge Q/e=-1, one candidate with a mass of approximately 4.2 GeV/c2 was found, which is compatible with the background rate expected according to a Monte Carlo simulation. The implications of this search for the mass limits of a conjectured stable or quasi-stable charged gluino composite {Mathematical expression} are discussed. Limits are also presented for the production of fractionally-charged particles with Q/e=±2/3 and ±4/3 as well as for particles with Q/e=±2.

UR - http://www.scopus.com/inward/record.url?scp=34249753786&partnerID=8YFLogxK

U2 - 10.1007/BF01571281

DO - 10.1007/BF01571281

M3 - Article

AN - SCOPUS:34249753786

SN - 1434-6044

VL - 67

SP - 203

EP - 211

JO - European Physical Journal C

JF - European Physical Journal C

IS - 2

ER -

Search for heavy charged particles and for particles with anomalous charge in e⁺e^- collisions at LEP

Abstract

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