Measurement of associated Z plus charm production in proton-proton collisions at root s=8TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10377244" target="_blank" >RIV/00216208:11320/18:10377244 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1140/epjc/s10052-018-5752-x" target="_blank" >https://doi.org/10.1140/epjc/s10052-018-5752-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-018-5752-x" target="_blank" >10.1140/epjc/s10052-018-5752-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of associated Z plus charm production in proton-proton collisions at root s=8TeV

Popis výsledku v původním jazyce

A study of the associated production of a Z boson and a charm quark jet (Z + c), and a comparison to production with a b quark jet (Z + b), in pp collisions at a centre-of-mass energy of 8 TeV are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb(-1), collected with the CMS detector at the CERN LHC. The Z boson candidates are identified through their decays into pairs of electrons or muons. Jets originating from heavy flavour quarks are identified using semileptonic decays of c or b flavoured hadrons and hadronic decays of charm hadrons. The measurements are performed in the kinematic region with two leptons with pT(l) &gt; 20 GeV, vertical bar eta(l)vertical bar &lt; 2.1, 71 &lt; m(ll) &lt; 111 GeV, and heavy flavour jets with p(T)(jet) &gt; 25 GeV and vertical bar eta(jet)vertical bar &lt; 2.5. The Z + c production cross section is measured to be sigma(pp -&gt; Z + c + X) B(Z -&gt; l(+)l(-)) = 8.8 +/- 0.5 (stat)+/- 0.6 (syst) pb. The ratio of the Z+c and Z+b production cross sections is measured to be sigma(pp -&gt; Z+c+X)/sigma (pp -&gt; Z+b+X) = 2.0 +/- 0.2 (stat)+/- 0.2 (syst). The Z+c production cross section and the cross section ratio are also measured as a function of the transverse momentum of theZ boson and of the heavy flavour jet. The measurements are compared with theoretical predictions.

Název v anglickém jazyce

Measurement of associated Z plus charm production in proton-proton collisions at root s=8TeV

Popis výsledku anglicky

A study of the associated production of a Z boson and a charm quark jet (Z + c), and a comparison to production with a b quark jet (Z + b), in pp collisions at a centre-of-mass energy of 8 TeV are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb(-1), collected with the CMS detector at the CERN LHC. The Z boson candidates are identified through their decays into pairs of electrons or muons. Jets originating from heavy flavour quarks are identified using semileptonic decays of c or b flavoured hadrons and hadronic decays of charm hadrons. The measurements are performed in the kinematic region with two leptons with pT(l) &gt; 20 GeV, vertical bar eta(l)vertical bar &lt; 2.1, 71 &lt; m(ll) &lt; 111 GeV, and heavy flavour jets with p(T)(jet) &gt; 25 GeV and vertical bar eta(jet)vertical bar &lt; 2.5. The Z + c production cross section is measured to be sigma(pp -&gt; Z + c + X) B(Z -&gt; l(+)l(-)) = 8.8 +/- 0.5 (stat)+/- 0.6 (syst) pb. The ratio of the Z+c and Z+b production cross sections is measured to be sigma(pp -&gt; Z+c+X)/sigma (pp -&gt; Z+b+X) = 2.0 +/- 0.2 (stat)+/- 0.2 (syst). The Z+c production cross section and the cross section ratio are also measured as a function of the transverse momentum of theZ boson and of the heavy flavour jet. The measurements are compared with theoretical predictions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

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

2018

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

—

Svazek periodika

78

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

34

Strana od-do

—

Kód UT WoS článku

000429589900001

EID výsledku v databázi Scopus

2-s2.0-85045152797