1996Physical Review LettersOpen access

Signatures for Squarks in the Light Gaugino Scenario

Glennys R. Farrar

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Abstract

When the gluino is light and long lived, missing energy is a poor signature for both squarks and gluinos. Instead, squark pair production leads to events with $\ensuremath{\ge}4$ jets. If a chargino can decay to squark and quark, missing energy is also a poor signature for the chargino. Properties of 4-jet events originating from squarks and charginos are discussed. ALEPH's preliminary report of an excess of 4-jet events with a peak in total dijet mass of 109 GeV (not confirmed by other experiments) is analyzed in terms of ${S}_{q}{S}_{q}^{*}$ and chargino pair production; concomitant signatures are noted.

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What this paper is about

When the gluino is light and long lived, missing energy is a poor signature for both squarks and gluinos. Instead, squark pair production leads to events with $\ensuremath{\ge}4$ jets. If a chargino can decay to squark and quark, missing energy is also a poor signature for the chargino. Properties of 4-jet events originating from squarks and charginos are discussed. ALEPH's preliminary report of an excess of 4-jet events with a peak in total dijet mass of 109 GeV (not confirmed by other experiments) is analyzed in terms of ${S}_{q}{S}_{q}^{*}$ and chargino pair production; concomitant signatures are noted.

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Available abstract

When the gluino is light and long lived, missing energy is a poor signature for both squarks and gluinos. Instead, squark pair production leads to events with $\ensuremath{\ge}4$ jets. If a chargino can decay to squark and quark, missing energy is also a poor signature for the chargino. Properties of 4-jet events originating from squarks and charginos are discussed. ALEPH's preliminary report of an excess of 4-jet events with a peak in total dijet mass of 109 GeV (not confirmed by other experiments) is analyzed in terms of ${S}_{q}{S}_{q}^{*}$ and chargino pair production; concomitant signatures are noted.

Key concepts: Chargino, Gluino, Particle physics, Gaugino, Physics, Missing energy, Pair production, Quark

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