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Search for light gravitinos in events with photons and missing transverse momentum at HERA

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Search for light gravitinos in events with photons and missing transverse momentum at HERA. / H1 Collaboration, The; Henderson, Robert C. W.; Sloan, Terry.
In: Physics Letters B, Vol. 616, No. 1-2, 09.06.2005, p. 31-42.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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H1 Collaboration T, Henderson RCW, Sloan T. Search for light gravitinos in events with photons and missing transverse momentum at HERA. Physics Letters B. 2005 Jun 9;616(1-2):31-42. doi: 10.1016/j.physletb.2005.04.038

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H1 Collaboration, The ; Henderson, Robert C. W. ; Sloan, Terry. / Search for light gravitinos in events with photons and missing transverse momentum at HERA. In: Physics Letters B. 2005 ; Vol. 616, No. 1-2. pp. 31-42.

Bibtex

@article{7eed6d8220f84868bdeda4c1b6b8a95f,
title = "Search for light gravitinos in events with photons and missing transverse momentum at HERA",
abstract = "A search for gravitinos produced in e±p collisions is performed using the H1 detector at HERA. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb−1 for e+p collisions and 13.5 pb−1 for e−p collisions. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings λ′ equal to 1, in some parts of the parameter space of the considered model.",
author = "{H1 Collaboration}, The and Henderson, {Robert C. W.} and Terry Sloan",
note = "Author list is partial - see original article for full author list.",
year = "2005",
month = jun,
day = "9",
doi = "10.1016/j.physletb.2005.04.038",
language = "English",
volume = "616",
pages = "31--42",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "ELSEVIER SCIENCE BV",
number = "1-2",

}

RIS

TY - JOUR

T1 - Search for light gravitinos in events with photons and missing transverse momentum at HERA

AU - H1 Collaboration, The

AU - Henderson, Robert C. W.

AU - Sloan, Terry

N1 - Author list is partial - see original article for full author list.

PY - 2005/6/9

Y1 - 2005/6/9

N2 - A search for gravitinos produced in e±p collisions is performed using the H1 detector at HERA. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb−1 for e+p collisions and 13.5 pb−1 for e−p collisions. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings λ′ equal to 1, in some parts of the parameter space of the considered model.

AB - A search for gravitinos produced in e±p collisions is performed using the H1 detector at HERA. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb−1 for e+p collisions and 13.5 pb−1 for e−p collisions. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings λ′ equal to 1, in some parts of the parameter space of the considered model.

U2 - 10.1016/j.physletb.2005.04.038

DO - 10.1016/j.physletb.2005.04.038

M3 - Journal article

VL - 616

SP - 31

EP - 42

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 1-2

ER -