S. Uehara (Avtor), Marko Bračko (Avtor), Boštjan Golob (Avtor), Jure Klučar (Avtor), Samo Korpar (Avtor), Peter Križan (Avtor), Rok Pestotnik (Avtor), Marko Petrič (Avtor), Marko Starič (Avtor), Luka Šantelj (Avtor), Anže Zupanc (Avtor)

Povzetek

We report a high-statistics measurement of the differential cross section of the process $\gamma \gamma \to K^0_S K^0_S$ in the range $1.05\,{\mathrm {GeV}} \leq W \leq 4.00$ , where W is the center-of-mass energy of the colliding photons, using 972 $^{-1}$ of data collected with the Belle detector at the KEKB asymmetric-energy e+e− collider operated at and near the $\Upsilon$-resonance region. The differential cross section is fitted by parameterized S-, $D_0$, $D_2$-, $G_0$-, and $G_2$-wave amplitudes. In the $D_2$ wave, the $f_2$(1270), $a_2$(1320), and $f′_2$(1525) are dominant and a resonance, the $f_2$(2200), is also present. The $f_0$(1710) and possibly the $f_0$(2500) are seen in the S wave. The mass, total width, and product of the two-photon partial decay width and decay branching fraction to the $K \bar {K}$ state $\Gamma _{\gamma \gamma }\mathcal {B}(K \bar {K})$ are extracted for the $f′_2$(1525), $f_0$(1710), $f_2$(2200), and $f_0$(2500). The destructive interference between the $f_2$(1270) and $a_2$(1320) is confirmed by measuring their relative phase. The parameters of the charmonium states $\chi _{c0}$ and $\chi _{c2}$ are updated. Possible contributions from the $\chi _{c0}(2P)$ and $\chi _{c2}(2P)$ states are discussed. A new upper limit for the branching fraction of the P- and CP-violating decay channel $\eta _c \to K^0_S K^0_S$ is reported. The detailed behavior of the cross section is updated and compared with QCD-based calculations.

Ključne besede

C00;C05;C07;C21;quantum chromodynamics;quark model;particle properties;lepton collider experiments;experimental particle physics;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 539.1
COBISS: 27459367 Povezava se bo odprla v novem oknu
ISSN: Y507-3596
Št. ogledov: 877
Št. prenosov: 108
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: C00;C05;C07;C21;kvantna kromodinamika;kvarkovski model;lastnosti delcev;eksperimenti;leptonski trkalnik;eksperimentalna fizika delcev;
URN: URN:SI:UM:
Vrsta dela (COBISS): Znanstveno delo
Strani: str. 123C01-1-123C01-45
Letnik: ǂVol. ǂ2013
Zvezek: ǂno. ǂ12
Čas izdaje: 2013
DOI: 10.1093/ptep/ptt097
ID: 10850529