Recent results from the search for new phenomena at D0

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We present results from several new searches for physics beyond the Standard Model. We describe a search based on the scalar sum of the transverse energy of the event, a global quantity nearly independent of the event topology. We summarize our searches for first generation leptoquarks into all three decay channels, eq{ovr eq}, eq{ovr {nu}q}, and {nu}q{ovr {nu}q} and note that this is the first time that the triumvirate of decay channels has been searched. We do not find any evidence for production of first generation leptoquarks and set a lower limit on the mass of the leptoquark of 175 ... continued below

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17 p.

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Wightman, J.A. & Collaboration, D0 June 1, 1997.

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We present results from several new searches for physics beyond the Standard Model. We describe a search based on the scalar sum of the transverse energy of the event, a global quantity nearly independent of the event topology. We summarize our searches for first generation leptoquarks into all three decay channels, eq{ovr eq}, eq{ovr {nu}q}, and {nu}q{ovr {nu}q} and note that this is the first time that the triumvirate of decay channels has been searched. We do not find any evidence for production of first generation leptoquarks and set a lower limit on the mass of the leptoquark of 175 GeV/c{sup 2} , assuming the decay is exclusively into eq{ovr eq}. We also present results from the first search for a third generation leptoquark with charge {+-}1/3. Again, we find no evidence for its existence for a mass less than 80 GeV/c{sup 2} Finally, we discuss one of our searches for supersymmetry, specifically the pair-production of {tilde e}, {tilde {nu}}, and {tilde {chi}}{sup 0}{sub 2} where the decay yields final states with two photons plus missing transverse energy (E{sub T}). We set limits on the production cross section ranging from 1 pb to 400 fb, depending on the mass. This analysis also sets a model-independent limit of {sigma} {center_dot} B(pp - {gamma}{gamma} {vert_bar} E{sub T} {vert_bar} X) < 185 fb at the 95% CL for E{sub T}{sup ({gamma})} > 12 GeV and {vert_bar}{eta}{vert_bar} < 1.1 T and E{sub T}> 25 GeV.

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17 p.

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INIS; OSTI as DE97054055

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  • 11. Les Rencontres de Physique de la Vallee D`Aoste: results and perspectives in particle physics, LaThuile (Italy), 2-8 Mar 1997

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  • Other: DE97054055
  • Report No.: FNAL/C--97/178-E
  • Report No.: CONF-9703116--
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 568853
  • Archival Resource Key: ark:/67531/metadc690963

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  • June 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 1, 2016, 4:48 p.m.

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Wightman, J.A. & Collaboration, D0. Recent results from the search for new phenomena at D0, article, June 1, 1997; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc690963/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.