Searches at HERA for squarks in R-parity violating supersymmetry

C Adloff; Yves Coppens; John Dowell; Peter Faulkner; Yves Fleming; John Garvey; Carrie Johnson; Ian Kenyon; David Lamb; Paul Newman; Syed Rizvi; Paul Thompson

doi:10.1007/s100520100716

Searches at HERA for squarks in R-parity violating supersymmetry

C Adloff, Yves Coppens, John Dowell, Peter Faulkner, Yves Fleming, John Garvey, Carrie Johnson, Ian Kenyon, David Lamb, Paul Newman, Syed Rizvi, Paul Thompson

Physics and Astronomy

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Abstract

A search for squarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA at a centre of mass energy of 300 GeV, using HI data corresponding to an integrated luminosity of 37 pb(-1). The direct production of single squarks of any generation in positron-quark fusion via a Yukawa coupling lambda' is considered, taking into account R-parity violating and conserving decays of the squarks. No significant deviation from the Standard Model expectation is found. The results are interpreted in terms of constraints within the minimal Supersymmetric Standard Model (MSSM), the constrained MSSM and the minimal Supergravity model, and their sensitivity to the model parameters is studied in detail. For a Yukawa coupling of electromagnetic strength, squark masses below 260 GeV are excluded at 95% confidence level in a large part of the parameter space. For a 100 times smaller coupling strength masses up to 182 GeV are excluded.

Original language	English
Pages (from-to)	639-657
Number of pages	19
Journal	European Physical Journal C
Volume	20
Issue number	4
DOIs	https://doi.org/10.1007/s100520100716
Publication status	Published - 1 May 2001

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title = "Searches at HERA for squarks in R-parity violating supersymmetry",

abstract = "A search for squarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA at a centre of mass energy of 300 GeV, using HI data corresponding to an integrated luminosity of 37 pb(-1). The direct production of single squarks of any generation in positron-quark fusion via a Yukawa coupling lambda' is considered, taking into account R-parity violating and conserving decays of the squarks. No significant deviation from the Standard Model expectation is found. The results are interpreted in terms of constraints within the minimal Supersymmetric Standard Model (MSSM), the constrained MSSM and the minimal Supergravity model, and their sensitivity to the model parameters is studied in detail. For a Yukawa coupling of electromagnetic strength, squark masses below 260 GeV are excluded at 95% confidence level in a large part of the parameter space. For a 100 times smaller coupling strength masses up to 182 GeV are excluded.",

author = "C Adloff and Yves Coppens and John Dowell and Peter Faulkner and Yves Fleming and John Garvey and Carrie Johnson and Ian Kenyon and David Lamb and Paul Newman and Syed Rizvi and Paul Thompson",

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TY - JOUR

T1 - Searches at HERA for squarks in R-parity violating supersymmetry

AU - Adloff, C

AU - Coppens, Yves

AU - Dowell, John

AU - Faulkner, Peter

AU - Fleming, Yves

AU - Garvey, John

AU - Johnson, Carrie

AU - Kenyon, Ian

AU - Lamb, David

AU - Newman, Paul

AU - Rizvi, Syed

AU - Thompson, Paul

PY - 2001/5/1

Y1 - 2001/5/1

N2 - A search for squarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA at a centre of mass energy of 300 GeV, using HI data corresponding to an integrated luminosity of 37 pb(-1). The direct production of single squarks of any generation in positron-quark fusion via a Yukawa coupling lambda' is considered, taking into account R-parity violating and conserving decays of the squarks. No significant deviation from the Standard Model expectation is found. The results are interpreted in terms of constraints within the minimal Supersymmetric Standard Model (MSSM), the constrained MSSM and the minimal Supergravity model, and their sensitivity to the model parameters is studied in detail. For a Yukawa coupling of electromagnetic strength, squark masses below 260 GeV are excluded at 95% confidence level in a large part of the parameter space. For a 100 times smaller coupling strength masses up to 182 GeV are excluded.

AB - A search for squarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA at a centre of mass energy of 300 GeV, using HI data corresponding to an integrated luminosity of 37 pb(-1). The direct production of single squarks of any generation in positron-quark fusion via a Yukawa coupling lambda' is considered, taking into account R-parity violating and conserving decays of the squarks. No significant deviation from the Standard Model expectation is found. The results are interpreted in terms of constraints within the minimal Supersymmetric Standard Model (MSSM), the constrained MSSM and the minimal Supergravity model, and their sensitivity to the model parameters is studied in detail. For a Yukawa coupling of electromagnetic strength, squark masses below 260 GeV are excluded at 95% confidence level in a large part of the parameter space. For a 100 times smaller coupling strength masses up to 182 GeV are excluded.

U2 - 10.1007/s100520100716

DO - 10.1007/s100520100716

M3 - Article

VL - 20

SP - 639

EP - 657

JO - European Physical Journal C

JF - European Physical Journal C

IS - 4

ER -

Searches at HERA for squarks in R-parity violating supersymmetry

Abstract

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