Gluino




In supersymmetry, a gluino (symbol
g͂
) is the hypothetical supersymmetric partner of a gluon. Should they exist, gluinos are expected by supersymmetry theorists to be pair produced in particle accelerators such as the Large Hadron Collider.[1]


In supersymmetric theories, gluinos are Majorana fermions and interact via the strong force as a color octet.[2] Gluinos have a lepton number 0, baryon number 0, and spin 1/2.


In models of supersymmetry that conserve R-parity, gluinos decay via the strong interaction to a squark and a quark, provided that an appropriate mass relation is satisfied.
The squark subsequently decays to another quark and the lightest supersymmetric particle, LSP (which leaves the detector unseen). This means that a typical signal for a gluino at a hadron collider would be four jets plus missing energy.


However, if gluinos are lighter than squarks, 3-body decay of a gluino to a neutralino and a quark antiquark pair is kinematically accessible through an off-shell squark.



Footnotes




  1. ^ Lincoln, Don (2013-07-03). "Supersymmetric glue: the search for gluinos". CERN. cms.web.cern.ch. Retrieved 28 April 2016..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ As there are 8 gluons of different color combinations, there are 8 gluinos of different color combinations, too.









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