Measurement of the \(e^+e^-\to K_SK_L\) cross section near the \(\phi(1020)\) resonance with the SND detector

Measurement of the \(e^+e^-\to K_SK_L\) cross section near the \(\phi(1020)\) resonance with the SND detector

The cross section for the \(e^+e^-\to K_SK_L\) process is measured in the center-of-mass energy range from 1000 MeV to 1100 MeV in the experiment with the SND detector at the VEPP-2000 \(e^+e^-\) collider. The measurement is carried out in the \(K_S\to 2\pi^0\) decay mode. Data with an integrated lu...

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Veröffentlicht in:arXiv.org 2024-09
Hauptverfasser: Collaboration, SND, Achasov, M N, A Yu Barnyakov, Bedarev, E V, Beloborodov, K I, Berdyugin, A V, Bogdanchikov, A G, Botov, A A, Chistyakov, D E, Dimova, T V, Druzhinin, V P, Kardapoltsev, E V, Kasaev, A S, Kattsin, A A, Kharlamov, A G, Koop, I A, Korol, A A, Kovrizhin, D P, Kupich, A S, Kryukov, A P, Melnikova, N A, N Yu Muchnoi, Obrazovsky, A E, Pakhtusova, E V, Pugachev, K V, Rastigeev, S A, Rogovsky, Yu A, Senchenko, A I, Serednyakov, S I, Shatunov, Yu M, Sherstyuk, S P, Shtol, D A, Silagadze, Z K, Surin, I K, Usov, Yu V, Zhabin, V N, Zharinov, Yu M
Format: Artikel
Sprache:eng
Schlagworte:
Cross-sections
Luminosity
Resonance
Uncertainty analysis
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Zusammenfassung:The cross section for the \(e^+e^-\to K_SK_L\) process is measured in the center-of-mass energy range from 1000 MeV to 1100 MeV in the experiment with the SND detector at the VEPP-2000 \(e^+e^-\) collider. The measurement is carried out in the \(K_S\to 2\pi^0\) decay mode. Data with an integrated luminosity of 20 pb\(^{-1}\) recorded in 2018 at 18 energy points are used in the analysis. The systematic uncertainty in the measured cross section at the maximum of the \(\phi\) resonance is 0.9%. The mass, width of the \(\phi\) meson, and the product of the branching fractions \(B(\phi\to K_SK_L)B(\phi\to e^+e^-)\) are determined from the fit to the cross-section energy dependence.
ISSN:2331-8422