Search for high mass photon pairs in e+ e- ---> f anti-f gamma gamma (f= e, μ, τ, v, q) at LEP

Physics

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https://doi.org/10.1016/0370-2693(93)91308-A
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Search for high mass photon pairs in e+ e- ---> f anti-f gamma gamma (f= e, μ, τ, v, q) at LEP. / ALEPH Collaboration.
In: Physics Letters B, Vol. 308, No. 3-4, 1993, p. 425-434.

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

Harvard

ALEPH Collaboration 1993, 'Search for high mass photon pairs in e+ e- ---> f anti-f gamma gamma (f= e, μ, τ, v, q) at LEP', Physics Letters B, vol. 308, no. 3-4, pp. 425-434. https://doi.org/10.1016/0370-2693(93)91308-A

APA

ALEPH Collaboration (1993). Search for high mass photon pairs in e+ e- ---> f anti-f gamma gamma (f= e, μ, τ, v, q) at LEP. Physics Letters B, 308(3-4), 425-434. https://doi.org/10.1016/0370-2693(93)91308-A

Vancouver

ALEPH Collaboration. Search for high mass photon pairs in e+ e- ---> f anti-f gamma gamma (f= e, μ, τ, v, q) at LEP. Physics Letters B. 1993;308(3-4):425-434. doi: 10.1016/0370-2693(93)91308-A

Author

ALEPH Collaboration. / Search for high mass photon pairs in e+ e- ---> f anti-f gamma gamma (f= e, μ, τ, v, q) at LEP. In: Physics Letters B. 1993 ; Vol. 308, No. 3-4. pp. 425-434.

Bibtex

@article{d8b115c12e0f4ad1a846be078b58beb2,

title = "Search for high mass photon pairs in e+ e- ---> f anti-f gamma gamma (f= e, μ, τ, v, q) at LEP",

abstract = "The result of a search for high mass photon pairs from the processes with the ALEPH detector is reported. The result for f = e, μ and τ is to be compared with the observation of 4 events by the L3 Collaboration with invariant masses, Mγγ, of the two photons near 60 GeV. From a data sample approximately twice as large taken from 1990 to 1992, 6 events are found with Mγγ distributed between 50 GeV and 72 GeV, while 4.9 events are expected from a QED calculation. There is no evidence for a mass peak; only one event (μ+μ−γγ) at Mγγ = 59.4 ± 0.2 GeV is compatible with the L3 observation. In addition, for Mγγ > 50 GeV, no event is found for and only one event is found consistent with ; this event has Mγγ = 58.5 ± 1.9 GeV. High mass photon pair events have also been searched for in γγ collisions. This allows one to set an upper limit of 50 MeV for the width of an assumed resonance decaying to photon pairs.",

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

year = "1993",

doi = "10.1016/0370-2693(93)91308-A",

language = "English",

volume = "308",

pages = "425--434",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "ELSEVIER SCIENCE BV",

number = "3-4",

}

RIS

TY - JOUR

T1 - Search for high mass photon pairs in e+ e- ---> f anti-f gamma gamma (f= e, μ, τ, v, q) at LEP

AU - Buskulic, D.

AU - Finch, Alexander

AU - ALEPH Collaboration

PY - 1993

Y1 - 1993

N2 - The result of a search for high mass photon pairs from the processes with the ALEPH detector is reported. The result for f = e, μ and τ is to be compared with the observation of 4 events by the L3 Collaboration with invariant masses, Mγγ, of the two photons near 60 GeV. From a data sample approximately twice as large taken from 1990 to 1992, 6 events are found with Mγγ distributed between 50 GeV and 72 GeV, while 4.9 events are expected from a QED calculation. There is no evidence for a mass peak; only one event (μ+μ−γγ) at Mγγ = 59.4 ± 0.2 GeV is compatible with the L3 observation. In addition, for Mγγ > 50 GeV, no event is found for and only one event is found consistent with ; this event has Mγγ = 58.5 ± 1.9 GeV. High mass photon pair events have also been searched for in γγ collisions. This allows one to set an upper limit of 50 MeV for the width of an assumed resonance decaying to photon pairs.

AB - The result of a search for high mass photon pairs from the processes with the ALEPH detector is reported. The result for f = e, μ and τ is to be compared with the observation of 4 events by the L3 Collaboration with invariant masses, Mγγ, of the two photons near 60 GeV. From a data sample approximately twice as large taken from 1990 to 1992, 6 events are found with Mγγ distributed between 50 GeV and 72 GeV, while 4.9 events are expected from a QED calculation. There is no evidence for a mass peak; only one event (μ+μ−γγ) at Mγγ = 59.4 ± 0.2 GeV is compatible with the L3 observation. In addition, for Mγγ > 50 GeV, no event is found for and only one event is found consistent with ; this event has Mγγ = 58.5 ± 1.9 GeV. High mass photon pair events have also been searched for in γγ collisions. This allows one to set an upper limit of 50 MeV for the width of an assumed resonance decaying to photon pairs.

U2 - 10.1016/0370-2693(93)91308-A

DO - 10.1016/0370-2693(93)91308-A

M3 - Journal article

VL - 308

SP - 425

EP - 434

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 3-4

ER -

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