Search for a new weakly interacting particle

Physics

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https://doi.org/10.1016/0370-2693(91)90657-C
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Search for a new weakly interacting particle. / ALEPH Collaboration.
In: Physics Letters B, Vol. 262, No. 1, 1991, p. 139-147.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

ALEPH Collaboration 1991, 'Search for a new weakly interacting particle', Physics Letters B, vol. 262, no. 1, pp. 139-147. https://doi.org/10.1016/0370-2693(91)90657-C

APA

ALEPH Collaboration (1991). Search for a new weakly interacting particle. Physics Letters B, 262(1), 139-147. https://doi.org/10.1016/0370-2693(91)90657-C

Vancouver

ALEPH Collaboration. Search for a new weakly interacting particle. Physics Letters B. 1991;262(1):139-147. doi: 10.1016/0370-2693(91)90657-C

Author

ALEPH Collaboration. / Search for a new weakly interacting particle. In: Physics Letters B. 1991 ; Vol. 262, No. 1. pp. 139-147.

Bibtex

@article{767b7ef5476a491b835de9478f047889,

title = "Search for a new weakly interacting particle",

abstract = "A search for events of the type e+e−→ℓ+ℓ−X0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l−)/Br(Z→l+l−), greater than 2.5 × 10−3 if the X0 has third component of isospin, I3 greater than and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2.",

author = "D. Decamp and Alexander Finch and {ALEPH Collaboration}",

year = "1991",

doi = "10.1016/0370-2693(91)90657-C",

language = "English",

volume = "262",

pages = "139--147",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "ELSEVIER SCIENCE BV",

number = "1",

}

RIS

TY - JOUR

T1 - Search for a new weakly interacting particle

AU - Decamp, D.

AU - Finch, Alexander

AU - ALEPH Collaboration

PY - 1991

Y1 - 1991

N2 - A search for events of the type e+e−→ℓ+ℓ−X0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l−)/Br(Z→l+l−), greater than 2.5 × 10−3 if the X0 has third component of isospin, I3 greater than and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2.

AB - A search for events of the type e+e−→ℓ+ℓ−X0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l−)/Br(Z→l+l−), greater than 2.5 × 10−3 if the X0 has third component of isospin, I3 greater than and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2.

U2 - 10.1016/0370-2693(91)90657-C

DO - 10.1016/0370-2693(91)90657-C

M3 - Journal article

VL - 262

SP - 139

EP - 147

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 1

ER -

Research

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