Search for black holes and sphalerons in high-multiplicity final states in proton-proton collisions at s SQUARE ROOT = 13 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10384175" target="_blank" >RIV/00216208:11320/18:10384175 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/JHEP11(2018)042" target="_blank" >https://doi.org/10.1007/JHEP11(2018)042</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP11(2018)042" target="_blank" >10.1007/JHEP11(2018)042</a>

Result language

angličtina

Original language name

Search for black holes and sphalerons in high-multiplicity final states in proton-proton collisions at s SQUARE ROOT = 13 TeV

Original language description

A search in energetic, high-multiplicity final states for evidence of physics beyond the standard model, such as black holes, string balls, and electroweak sphalerons, is presented. The data sample corresponds to an integrated luminosity of 35.9 fb(-1) collected with the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV in 2016. Standard model backgrounds, dominated by multijet production, are determined from control regions in data without any reliance on simulation. No evidence for excesses above the predicted background is observed. Model-independent 95% confidence level upper limits on the cross section of beyond the standard model signals in these final states are set and further interpreted in terms of limits on semiclassical black hole, string ball, and sphaleron production. In the context of models with large extra dimensions, semiclassical black holes with minimum masses as high as 10.1 TeV and string balls with masses as high as 9.5 TeV are excluded by this search. Results of the first dedicated search for electroweak sphalerons are presented. An upper limit of 0.021 is set at 95% confidence level on the fraction of all quark-quark interactions above the nominal threshold energy of 9 TeV resulting in the sphaleron transition.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10304 - Nuclear physics

Project

<a href="/en/project/LG14004" target="_blank" >LG14004: Cooperation of Czech Republic with JINR Dubna in the theoretical and nuclear physics and application of nuclear methods in other fields</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of High Energy Physics [online]

ISSN

1029-8479

e-ISSN

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Volume of the periodical

2018

Issue of the periodical within the volume

11

Country of publishing house

DE - GERMANY

Number of pages

49

Pages from-to

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UT code for WoS article

000450504400001

EID of the result in the Scopus database

2-s2.0-85056647097