Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at root s=13 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10445558" target="_blank" >RIV/00216208:11320/22:10445558 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Ls_mytornD" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Ls_mytornD</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP07(2022)081" target="_blank" >10.1007/JHEP07(2022)081</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at root s=13 TeV

Popis výsledku v původním jazyce

A search for heavy neutral leptons (HNLs), the right-handed Dirac or Majorana neutrinos, is performed in final states with three charged leptons (electrons or muons) using proton-proton collision data collected by the CMS experiment at root s = 13 TeV at the CERN LHC. The data correspond to an integrated luminosity of 138 fb(-1). The HNLs could be produced through mixing with standard model neutrinos v. For small values of the HNL mass (&lt;20 GeV) and the square of the HNL-v mixing parameter (10(-7)-10(-2)), the decay length of these particles can be large enough so that the secondary vertex of the HNL decay can be resolved with the CMS silicon tracker. The selected final state consists of one lepton emerging from the primary proton-proton collision vertex, and two leptons forming a displaced, secondary vertex. No significant deviations from the standard model expectations are observed, and constraints are obtained on the HNL mass and coupling strength parameters, excluding previously unexplored regions of parameter space in the mass range 1-20 GeV and squared mixing parameter values as low as 10(-7).

Název v anglickém jazyce

Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at root s=13 TeV

Popis výsledku anglicky

A search for heavy neutral leptons (HNLs), the right-handed Dirac or Majorana neutrinos, is performed in final states with three charged leptons (electrons or muons) using proton-proton collision data collected by the CMS experiment at root s = 13 TeV at the CERN LHC. The data correspond to an integrated luminosity of 138 fb(-1). The HNLs could be produced through mixing with standard model neutrinos v. For small values of the HNL mass (&lt;20 GeV) and the square of the HNL-v mixing parameter (10(-7)-10(-2)), the decay length of these particles can be large enough so that the secondary vertex of the HNL decay can be resolved with the CMS silicon tracker. The selected final state consists of one lepton emerging from the primary proton-proton collision vertex, and two leptons forming a displaced, secondary vertex. No significant deviations from the standard model expectations are observed, and constraints are obtained on the HNL mass and coupling strength parameters, excluding previously unexplored regions of parameter space in the mass range 1-20 GeV and squared mixing parameter values as low as 10(-7).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/LG14004" target="_blank" >LG14004: Spolupráce ČR s SÚJV Dubna v teoretické a jaderné fyzice a při využití jaderných metod v dalších oborech</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics [online]

ISSN

1029-8479

e-ISSN

—

Svazek periodika

2022

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

56

Strana od-do

081

Kód UT WoS článku

000826915800001

EID výsledku v databázi Scopus

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