Hard color-singlet exchange in dijet events in proton-proton collisions at s =13 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00353166" target="_blank" >RIV/68407700:21220/21:00353166 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23220/21:43965087

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.104.032009" target="_blank" >https://doi.org/10.1103/PhysRevD.104.032009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.104.032009" target="_blank" >10.1103/PhysRevD.104.032009</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hard color-singlet exchange in dijet events in proton-proton collisions at s =13 TeV

Popis výsledku v původním jazyce

Events where the two leading jets are separated by a pseudorapidity interval devoid of particle activity, known as jet-gap-jet events, are studied in proton-proton collisions at root s = 13 TeV. The signature is expected from hard color-singlet exchange. Each of the highest transverse momentum (p_T) jets must have p^(jet)_T > 40 GeV and pseudorapidity 1.4 < |η^(jet)| < 4.7, with η^(jet1)η^(jet2) < 0, where jet1 and jet2 are the leading and subleading jets in p_T, respectively. The analysis is based on data collected by the CMS and TOTEM experiments during a low luminosity, high-β* run at the CERN LHC in 2015, with an integrated luminosity of 0.66 pb⁻¹. Events with a low number of charged particles with p_T > 0.2 GeV in the interval |η| < 1 between the jets are observed in excess of calculations that assume only color-exchange. The fraction of events produced via color-singlet exchange, f_(CSE), is measured as a function of p^(jet2)_T, the pseudorapidity difference between the two leading jets, and the azimuthal angular separation between the two leading jets. The fraction f_(CSE) has values of 0.4–1.0%. The results are compared with previous measurements and with predictions from perturbative quantum chromodynamics. In addition, the first study of jet-gap-jet events detected in association with an intact proton using a subsample of events with an integrated luminosity of 0.40 pb⁻¹ is presented. The intact protons are detected with the Roman pot detectors of the TOTEM experiment. The f_(CSE) in this sample is 2.91±0.70(stat)^(+1.08)_(-1.01)(syst) times larger than that for inclusive dijet production in dijets with similar kinematics.

Název v anglickém jazyce

Hard color-singlet exchange in dijet events in proton-proton collisions at s =13 TeV

Popis výsledku anglicky

Events where the two leading jets are separated by a pseudorapidity interval devoid of particle activity, known as jet-gap-jet events, are studied in proton-proton collisions at root s = 13 TeV. The signature is expected from hard color-singlet exchange. Each of the highest transverse momentum (p_T) jets must have p^(jet)_T > 40 GeV and pseudorapidity 1.4 < |η^(jet)| < 4.7, with η^(jet1)η^(jet2) < 0, where jet1 and jet2 are the leading and subleading jets in p_T, respectively. The analysis is based on data collected by the CMS and TOTEM experiments during a low luminosity, high-β* run at the CERN LHC in 2015, with an integrated luminosity of 0.66 pb⁻¹. Events with a low number of charged particles with p_T > 0.2 GeV in the interval |η| < 1 between the jets are observed in excess of calculations that assume only color-exchange. The fraction of events produced via color-singlet exchange, f_(CSE), is measured as a function of p^(jet2)_T, the pseudorapidity difference between the two leading jets, and the azimuthal angular separation between the two leading jets. The fraction f_(CSE) has values of 0.4–1.0%. The results are compared with previous measurements and with predictions from perturbative quantum chromodynamics. In addition, the first study of jet-gap-jet events detected in association with an intact proton using a subsample of events with an integrated luminosity of 0.40 pb⁻¹ is presented. The intact protons are detected with the Roman pot detectors of the TOTEM experiment. The f_(CSE) in this sample is 2.91±0.70(stat)^(+1.08)_(-1.01)(syst) times larger than that for inclusive dijet production in dijets with similar kinematics.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

104

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

35

Strana od-do

—

Kód UT WoS článku

000689736000001

EID výsledku v databázi Scopus

2-s2.0-85114162630