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Searches for Dijet Resonances

2018-09-04 Science
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Release : 2018-09-04
Genre : Science
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Book Synopsis Searches for Dijet Resonances by : Lydia Audrey Beresford

Download or read book Searches for Dijet Resonances written by Lydia Audrey Beresford. This book was released on 2018-09-04. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses one of the most intriguing mysteries of our universe: the nature of dark matter. The results presented here mark a significant and substantial contribution to the search for new physics, in particular for new particles that couple to dark matter. The first analysis presented is a search for heavy new particles that decay into pairs of hadronic jets (dijets). This pioneering analysis explores unprecedented dijet invariant masses, reaching nearly 7 TeV, and sets constraints on several important new physics models. The two subsequent analyses focus on the difficult low dijet mass region, down to 200 GeV, and employ a novel technique to efficiently gather low-mass dijet events. The results of these analyses transcend the long-standing constraints on dark matter mediator particles set by several existing experiments.

Search for Dijet Resonances in Proton-proton Collisions at $\sqrt{s}

2016
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Release : 2016
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Book Synopsis Search for Dijet Resonances in Proton-proton Collisions at $\sqrt{s} by :

Download or read book Search for Dijet Resonances in Proton-proton Collisions at $\sqrt{s} written by . This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: A search is presented for narrow resonances decaying to dijet final states in proton-proton collisions at sqrt(s)=13 TeV using data corresponding to an integrated luminosity of 12.9 inverse femtobarns. The dijet mass spectrum is well described by a smooth parameterization and no significant evidence for the production of new particles is observed. Upper limits at 95% confidence level are reported on the production cross section for narrow resonances with masses above 0.6 TeV. In the context of specific models, the limits exclude string resonances with masses below 7.4 TeV, scalar diquarks below 6.9 TeV, axigluons and colorons below 5.5 TeV, excited quarks below 5.4 TeV, color-octet ascalars below 3.0 TeV, W' bosons below 2.7 TeV, Z' bosons below 2.1 TeV and between 2.3 and 2.6 TeV, and RS gravitons below 1.9 TeV. These extend previous limits in the dijet channel. Vector and axial-vector mediators in a simplified model of interactions between quarks and dark matter are excluded below 2.0 TeV. The first limits in the dijet channel on dark matter mediators are presented as functions of dark matter mass and are compared to the exclusions of dark matter in direct detection experiments.

Search for Dijet Resonances in Proton-proton Collisions At√s

2016
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Release : 2016
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Book Synopsis Search for Dijet Resonances in Proton-proton Collisions At√s by :

Download or read book Search for Dijet Resonances in Proton-proton Collisions At√s written by . This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt:

Search for Dijet Resonances Using Events with Three Jets in Proton-proton Collisions at √s

2019
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Release : 2019
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Book Synopsis Search for Dijet Resonances Using Events with Three Jets in Proton-proton Collisions at √s by : Albert M. Sirunyan

Download or read book Search for Dijet Resonances Using Events with Three Jets in Proton-proton Collisions at √s written by Albert M. Sirunyan. This book was released on 2019. Available in PDF, EPUB and Kindle. Book excerpt:

Search for Narrow Resonances Decaying to Dijets in Proton-proton Collisions at {u221A}s

2016
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Release : 2016
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Book Synopsis Search for Narrow Resonances Decaying to Dijets in Proton-proton Collisions at {u221A}s by :

Download or read book Search for Narrow Resonances Decaying to Dijets in Proton-proton Collisions at {u221A}s written by . This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a search for narrow resonances in proton-proton collisions at √s = 13 TeV is presented. The invariant mass distribution of the two leading jets is measured with the CMS detector using a data set corresponding to an integrated luminosity of 2.4 fb–1. The highest observed dijet mass is 6.1 TeV. The distribution is smooth and no evidence for resonant particles is observed. Upper limits at 95% confidence level are set on the production cross section for narrow resonances with masses above 1.5 TeV. When interpreted in the context of specific models, the limits exclude string resonances with masses below 7.0 TeV, scalar diquarks below 6.0 TeV, axigluons and colorons below 5.1 TeV, excited quarks below 5.0 TeV, color-octet scalars below 3.1 TeV, and W' bosons below 2.6 TeV. These results significantly extend previously published limits.

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