K- over K multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24510%2F18%3A00006373" target="_blank" >RIV/46747885:24510/18:00006373 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081731:_____/18:00497574 RIV/68407700:21230/18:00324688 RIV/68407700:21340/18:00324688 RIV/00216208:11320/18:10447623

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0370269318307536" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0370269318307536</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2018.09.052" target="_blank" >10.1016/j.physletb.2018.09.052</a>

Jazyk výsledku

angličtina

Název v původním jazyce

K- over K multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

Popis výsledku v původním jazyce

© 2018 The Author(s) The K − over K multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction z of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and an isoscalar 6 LiD target. The regime of deep-inelastic scattering is ensured by requiring Q 2 >1(GeV/c) 2 for the photon virtuality and W>5GeV/c 2 for the invariant mass of the produced hadronic system. Kaons are identified in the momentum range from 12 GeV/c to 40 GeV/c, thereby restricting the range in Bjorken-x to 0.010.75. For very large values of z, i.e. z>0.8, we observe the kaon multiplicity ratio to fall below the lower limits expected from calculations based on leading and next-to-leading order perturbative quantum chromodynamics. Also, the kaon multiplicity ratio shows a strong dependence on the missing mass of the single-kaon production process. This suggests that within the perturbative quantum chromodynamics formalism an additional correction may be required, which takes into account the phase space available for hadronisation.

Název v anglickém jazyce

K- over K multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

Popis výsledku anglicky

© 2018 The Author(s) The K − over K multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction z of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and an isoscalar 6 LiD target. The regime of deep-inelastic scattering is ensured by requiring Q 2 >1(GeV/c) 2 for the photon virtuality and W>5GeV/c 2 for the invariant mass of the produced hadronic system. Kaons are identified in the momentum range from 12 GeV/c to 40 GeV/c, thereby restricting the range in Bjorken-x to 0.010.75. For very large values of z, i.e. z>0.8, we observe the kaon multiplicity ratio to fall below the lower limits expected from calculations based on leading and next-to-leading order perturbative quantum chromodynamics. Also, the kaon multiplicity ratio shows a strong dependence on the missing mass of the single-kaon production process. This suggests that within the perturbative quantum chromodynamics formalism an additional correction may be required, which takes into account the phase space available for hadronisation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ISSN

0370-2693

e-ISSN

—

Svazek periodika

786

Číslo periodika v rámci svazku

786

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

390-398

Kód UT WoS článku

000452318400053

EID výsledku v databázi Scopus

2-s2.0-85055660110