Search for new phenomena in events with two Z bosons and missing transverse momentum in p(p)over-bar collisions at root s=1.96 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F12%3A00382478" target="_blank" >RIV/68378271:_____/12:00382478 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevD.85.011104" target="_blank" >http://dx.doi.org/10.1103/PhysRevD.85.011104</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.85.011104" target="_blank" >10.1103/PhysRevD.85.011104</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for new phenomena in events with two Z bosons and missing transverse momentum in p(p)over-bar collisions at root s=1.96 TeV

Popis výsledku v původním jazyce

We present a search for new phenomena in events with two reconstructed $Z$ bosons and large missing transverse momentum, sensitive to processes $p/bar{p}/rightarrow X_2X_2 /rightarrow Z Z X_1 X_1$, where $X_2$ is an unstable particle decaying as $X_2/rightarrow ZX_1$ and $X_1$ is undetected. The particles $X_1$ and $X_2$ may be, among other possibilities, fourth generation neutrinos or supersymmetric particles. We study the final state in which one $Z$ boson decays to two charged leptons and the seconddecays hadronically. In data corresponding to an integrated luminosity of 4.2 fb$^{-1}$ from proton-antiproton collisions recorded by the CDF II detector at the Tevatron, with center-of-mass energy of 1.96 TeV, we find agreement between data and standard-model backgrounds. We calculate 95% confidence level upper limits on the cross section of the process $p/bar{p}/rightarrow X_2X_2 /rightarrow Z Z X_1 X_1$ ranging from 50 fb to 1 pb, depending on the masses of $X_1$ and $X_2$.

Název v anglickém jazyce

Search for new phenomena in events with two Z bosons and missing transverse momentum in p(p)over-bar collisions at root s=1.96 TeV

Popis výsledku anglicky

We present a search for new phenomena in events with two reconstructed $Z$ bosons and large missing transverse momentum, sensitive to processes $p/bar{p}/rightarrow X_2X_2 /rightarrow Z Z X_1 X_1$, where $X_2$ is an unstable particle decaying as $X_2/rightarrow ZX_1$ and $X_1$ is undetected. The particles $X_1$ and $X_2$ may be, among other possibilities, fourth generation neutrinos or supersymmetric particles. We study the final state in which one $Z$ boson decays to two charged leptons and the seconddecays hadronically. In data corresponding to an integrated luminosity of 4.2 fb$^{-1}$ from proton-antiproton collisions recorded by the CDF II detector at the Tevatron, with center-of-mass energy of 1.96 TeV, we find agreement between data and standard-model backgrounds. We calculate 95% confidence level upper limits on the cross section of the process $p/bar{p}/rightarrow X_2X_2 /rightarrow Z Z X_1 X_1$ ranging from 50 fb to 1 pb, depending on the masses of $X_1$ and $X_2$.

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/LC527" target="_blank" >LC527: Centrum částicové fyziky</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Physical Review D: Particles, Fields, Gravitation and Cosmology

ISSN

1550-7998

e-ISSN

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Svazek periodika

85

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

"011104-1"-"011104-7"

Kód UT WoS článku

000299927500001

EID výsledku v databázi Scopus

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