Scalar quark searches in e+e- collisions at √s = 181 - 184 GeV
Searches for scalar top, scalar bottom and degenerate scalar quarks have been performed with data collected with the ALEPH detector at LEP. The data sample consists of 57 pb−1 taken at s = 181–184 GeV. No evidence for scalar top, scalar bottom or degenerate scalar quarks was found in the channels t̃...
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| Main Authors: | , |
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| Format: | text |
| Language: | English |
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Institutional Knowledge at Singapore Management University
1998
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| Online Access: | https://ink.library.smu.edu.sg/sis_research/5784 https://ink.library.smu.edu.sg/context/sis_research/article/6787/viewcontent/ep_98_076.pdf |
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| Institution: | Singapore Management University |
| Language: | English |
| Summary: | Searches for scalar top, scalar bottom and degenerate scalar quarks have been performed with data collected with the ALEPH detector at LEP. The data sample consists of 57 pb−1 taken at s = 181–184 GeV. No evidence for scalar top, scalar bottom or degenerate scalar quarks was found in the channels t̃→cχ, t̃→bℓν̃, b̃→bχ, and q̃→qχ. From the channel t̃→cχ a limit of 74 GeV/c2has been set on the scalar top quark mass, independent of the mixing angle. This limit assumes a mass difference between the t̃ and the χ in the range 10–40 GeV/c2. From the channel t̃→bℓν̃ the mixing-angle-independent scalar top limit is 82 GeV/c2, assuming mt̃−mν̃ > 10 GeV/c2. From the channel b̃→bχ, a limit of 79 GeV/c2has been set on the mass of the supersymmetric partner of the left-handed state of the bottom quark. This limit is valid for mb̃−mχ > 10 GeV/c2. From the channel q̃→qχ, a limit of 87 GeV/c2has been set on the mass of supersymmetric partners of light quarks assuming five degenerate flavours and the production of both “left-handed” and “right-handed” squarks. This limit is valid for mq̃−mχ > 5 GeV/c2. |
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