Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in sqrt(s)= 8 TeV pp collisions with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00434685" target="_blank" >RIV/68378271:_____/14:00434685 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1140/epjc/s10052-014-2883-6" target="_blank" >http://dx.doi.org/10.1140/epjc/s10052-014-2883-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-014-2883-6" target="_blank" >10.1140/epjc/s10052-014-2883-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in sqrt(s)= 8 TeV pp collisions with the ATLAS detector

Popis výsledku v původním jazyce

A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton-proton collision data at s=8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t2) followed by the decay to the lighter top squark state (t1) via t2Zt1, and for t1 pair production in natural gauge-mediated supersymmetry breaking scenarios where the neutralino (?01) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G) via the ?01ZG process.

Název v anglickém jazyce

Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in sqrt(s)= 8 TeV pp collisions with the ATLAS detector

Popis výsledku anglicky

A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton-proton collision data at s=8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t2) followed by the decay to the lighter top squark state (t1) via t2Zt1, and for t1 pair production in natural gauge-mediated supersymmetry breaking scenarios where the neutralino (?01) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G) via the ?01ZG process.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

<a href="/cs/project/LG13009" target="_blank" >LG13009: Mezinárodní experiment ATLAS-CERN</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

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Svazek periodika

74

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

29

Strana od-do

1-29

Kód UT WoS článku

000337043800001

EID výsledku v databázi Scopus

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