TY - JOUR

T1 - On-line luminosity measurements at Belle II

AU - Kovalenko, E.

PY - 2020/6/1

Y1 - 2020/6/1

N2 - The Belle II detector at the SuperKEKB e+e- collider started its operation in April 2018. We describe a system used at the Belle II experiment for the on-line measurement of the luminosity provided by the collider utilizing elastic e^+e^- Bhabha scattering and two-photon annihilation processes. A statistical accuracy of 5% has been achieved at the luminosity of 1034 cm-2s-1 with a counting rate of about 1 Hz. The overall systematic uncertainty is estimated to be at the level of 1.7%. Comparison with offline results is also presented.

AB - The Belle II detector at the SuperKEKB e+e- collider started its operation in April 2018. We describe a system used at the Belle II experiment for the on-line measurement of the luminosity provided by the collider utilizing elastic e^+e^- Bhabha scattering and two-photon annihilation processes. A statistical accuracy of 5% has been achieved at the luminosity of 1034 cm-2s-1 with a counting rate of about 1 Hz. The overall systematic uncertainty is estimated to be at the level of 1.7%. Comparison with offline results is also presented.

KW - Accelerator subsystems and technologies

KW - Hardware and accelerator control systems

KW - Performance of high energy physics detectors

KW - Trigger algorithms

KW - Accelerator Subsystems and Technologies

KW - Performance of High Energy Physics Detectors

UR - http://www.scopus.com/inward/record.url?scp=85088323469&partnerID=8YFLogxK

U2 - 10.1088/1748-0221/15/06/C06067

DO - 10.1088/1748-0221/15/06/C06067

M3 - Article

AN - SCOPUS:85088323469

VL - 15

JO - Journal of Instrumentation

JF - Journal of Instrumentation

SN - 1748-0221

IS - 6

M1 - C06067

ER -