Study of K-S(0) pair production in single-tag two-photon collisions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10387010" target="_blank" >RIV/00216208:11320/18:10387010 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.97.052003" target="_blank" >https://doi.org/10.1103/PhysRevD.97.052003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.97.052003" target="_blank" >10.1103/PhysRevD.97.052003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of K-S(0) pair production in single-tag two-photon collisions

Popis výsledku v původním jazyce

We report a measurement of the cross section for K-S(0) pair production in single-tag two-photon collisions, gamma*gamma -&gt; (KSKS0)-K-0, for Q(2) up to 30 GeV2, where Q(2) is the negative of the invariant mass squared of the tagged photon. The measurement covers the kinematic range 1.0 GeV &lt; W &lt; 2.6 GeV and vertical bar cos theta*vertical bar &lt; 1.0 for the total energy and kaon scattering angle, respectively, in the gamma*gamma center-of-mass system. These results are based on a data sample of 759 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. For the first time, the transition form factor of the f&apos;(2)(1525) meson is measured separately for the helicity-0, -1, and -2 components and also compared with theoretical calculations. We have derived the cross section for the process for W &lt; 2.6 GeV from 121 signal candidate events. Finally, the gamma*gamma partial decay widths of the chi(c0) and chi(c2) mesons are measured as a function of Q(2) based on 10 candidate events in total.

Název v anglickém jazyce

Study of K-S(0) pair production in single-tag two-photon collisions

Popis výsledku anglicky

We report a measurement of the cross section for K-S(0) pair production in single-tag two-photon collisions, gamma*gamma -&gt; (KSKS0)-K-0, for Q(2) up to 30 GeV2, where Q(2) is the negative of the invariant mass squared of the tagged photon. The measurement covers the kinematic range 1.0 GeV &lt; W &lt; 2.6 GeV and vertical bar cos theta*vertical bar &lt; 1.0 for the total energy and kaon scattering angle, respectively, in the gamma*gamma center-of-mass system. These results are based on a data sample of 759 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. For the first time, the transition form factor of the f&apos;(2)(1525) meson is measured separately for the helicity-0, -1, and -2 components and also compared with theoretical calculations. We have derived the cross section for the process for W &lt; 2.6 GeV from 121 signal candidate events. Finally, the gamma*gamma partial decay widths of the chi(c0) and chi(c2) mesons are measured as a function of Q(2) based on 10 candidate events in total.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LTT17020" target="_blank" >LTT17020: Studium fyziky za standardním modelem v mezinárodním experimentu Belle II v Japonsku</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

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

—

Svazek periodika

97

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

20

Strana od-do

—

Kód UT WoS článku

000427315000001

EID výsledku v databázi Scopus

2-s2.0-85044846599