Limit on the mass of a long-lived or stable gluino

G.R. Farrar; R. Mackeprang; J.P. Roberts; D. Milstead

doi:10.1007/jhep02(2011)018

Limit on the mass of a long-lived or stable gluino

G.R. Farrar, R. Mackeprang, J.P. Roberts, D. Milstead

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Abstract

We reinterpret the generic CDF charged massive particle limit to obtain a limit on the mass of a stable or long-lived gluino. Various sources of uncertainty are examined. The R-hadron spectrum and scattering cross sections are modeled based on known lowenergy hadron physics and the resultant uncertainties are quantified and found to be small compared to uncertainties from the scale dependence of the NLO pQCD production cross sections. The largest uncertainty in the limit comes from the unknown squark mass: when the squark - gluino mass splitting is small, we obtain a gluino mass limit of 407 GeV, while in the limit of heavy squarks the gluino mass limit is 397 GeV. For arbitrary (degenerate) squark masses, we obtain a lower limit of 322 GeV on the gluino mass. These limits apply for any gluino lifetime longer than ∼ 30 ns, and are the most stringent limits for such a long-lived or stable gluino.

Original language	English
Journal	Journal of High Energy Physics (Online)
Volume	2011
Issue number	2
Pages (from-to)	018
ISSN	1126-6708
DOIs	https://doi.org/10.1007/jhep02(2011)018
Publication status	Published - 1 Feb 2011

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abstract = "We reinterpret the generic CDF charged massive particle limit to obtain a limit on the mass of a stable or long-lived gluino. Various sources of uncertainty are examined. The R-hadron spectrum and scattering cross sections are modeled based on known lowenergy hadron physics and the resultant uncertainties are quantified and found to be small compared to uncertainties from the scale dependence of the NLO pQCD production cross sections. The largest uncertainty in the limit comes from the unknown squark mass: when the squark - gluino mass splitting is small, we obtain a gluino mass limit of 407 GeV, while in the limit of heavy squarks the gluino mass limit is 397 GeV. For arbitrary (degenerate) squark masses, we obtain a lower limit of 322 GeV on the gluino mass. These limits apply for any gluino lifetime longer than ∼ 30 ns, and are the most stringent limits for such a long-lived or stable gluino.",

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T1 - Limit on the mass of a long-lived or stable gluino

AU - Farrar, G.R.

AU - Mackeprang, R.

AU - Roberts, J.P.

AU - Milstead, D.

PY - 2011/2/1

Y1 - 2011/2/1

N2 - We reinterpret the generic CDF charged massive particle limit to obtain a limit on the mass of a stable or long-lived gluino. Various sources of uncertainty are examined. The R-hadron spectrum and scattering cross sections are modeled based on known lowenergy hadron physics and the resultant uncertainties are quantified and found to be small compared to uncertainties from the scale dependence of the NLO pQCD production cross sections. The largest uncertainty in the limit comes from the unknown squark mass: when the squark - gluino mass splitting is small, we obtain a gluino mass limit of 407 GeV, while in the limit of heavy squarks the gluino mass limit is 397 GeV. For arbitrary (degenerate) squark masses, we obtain a lower limit of 322 GeV on the gluino mass. These limits apply for any gluino lifetime longer than ∼ 30 ns, and are the most stringent limits for such a long-lived or stable gluino.

AB - We reinterpret the generic CDF charged massive particle limit to obtain a limit on the mass of a stable or long-lived gluino. Various sources of uncertainty are examined. The R-hadron spectrum and scattering cross sections are modeled based on known lowenergy hadron physics and the resultant uncertainties are quantified and found to be small compared to uncertainties from the scale dependence of the NLO pQCD production cross sections. The largest uncertainty in the limit comes from the unknown squark mass: when the squark - gluino mass splitting is small, we obtain a gluino mass limit of 407 GeV, while in the limit of heavy squarks the gluino mass limit is 397 GeV. For arbitrary (degenerate) squark masses, we obtain a lower limit of 322 GeV on the gluino mass. These limits apply for any gluino lifetime longer than ∼ 30 ns, and are the most stringent limits for such a long-lived or stable gluino.

U2 - 10.1007/jhep02(2011)018

DO - 10.1007/jhep02(2011)018

M3 - Journal article

SN - 1126-6708

VL - 2011

SP - 018

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

IS - 2

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Limit on the mass of a long-lived or stable gluino

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