The trigger system of the KLOE experiment

Adinolfi, Marta; Ambrosino, F.; Antonelli, M.; Bini, C.; Bocci, V.; Bossi, F.; Branchini, P.; Cabibbo, G.; Caloi, R.; Casarsa, M.; Cataldi, G.; Ciambrone, P.; Lucia, E. De; Robertis, G. De; Simone, P. De; Agnello, Simone Dell'; Denig, A.; Domenico, A. Di; Donato, C. Di; Falco, S. Di; Doria, A.; Felici, G.; Ferrari, A.; Finocchiaro, G.; Forti, C.; Franzini, P.; Gatti, C.; Gauzzi, P.; Gero, E; Giovannella, S.; Graziani, E.; Guarnaccia, P.; Incagli, M.; Kuo, C. C.; Lanfranchi, G.; Martemianov, M.; Mei, W.; Messi, R.; Moulson, M.; Müller, S.; Murtas, F.; Pacciani, L.; Palutan, M.; Pasqualucci, E.; Passalacqua, L.; Passeri, A.; Patera, V.; Picca, D.; Pirozzi, Gianluca; Pontecorvo, L.; Primavera, M.; Ruggieri, F.; Santangelo, P.; Santovetti, E.; Saracino, G.; Schwick, C; Sciascia, B.; Sciubba, A.; Sfiligoi, I.; Spadaro, T.; Spiriti, E.; Valente, P.; Valeriani, B.; Venanzoni, G.; Ventura, A.

doi:10.1016/s0168-9002(02)01313-x

Cited by 89 publications

(33 citation statements)

References 2 publications

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“…Cluster positions are measured with a resolution of 1.3 cm in the coordinate transverse to the fibers, and, by timing, of 1.2 cm/ E (GeV) in the longitudinal coordinate. The KLOE trigger [17] is based on the coincidence of two energy deposits with E > 50 MeV in the barrel and E > 150 MeV in the endcaps. Moreover, to reduce the trigger rate due to cosmic rays crossing the detector, events with a large energy release in the outermost calorimeter planes are vetoed.…”

Section: Daφne and Kloementioning

confidence: 99%

Measurement of the η→3π0 slope parameter α with the KLOE detector

Ambrosino¹,

Antonelli²,

Antonelli³

et al. 2010

Physics Letters B

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We present a measurement of the slope parameter α for the η → 3π 0 decay, with the KLOE experiment at the DAΦNE φ-factory, based on a background free sample of ∼ 17 millions η mesons produced in φ radiative decays. By fitting the event density in the Dalitz plot we determine α = −0.0301 ± 0.0035 stat +0.0022 −0.0035 syst . The result is in agreement with recent measurements from hadro-and photo-production experiments.

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Section: Daφne and Kloementioning

confidence: 99%

Measurement of the η→3π0 slope parameter α with the KLOE detector

Ambrosino¹,

Antonelli²,

Antonelli³

et al. 2010

Physics Letters B

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“…The trigger [10] uses both EMC and DC information. Two energy deposits above threshold (E > 50 for barrel and > 150 MeV for endcaps) are required for the EMC trigger.…”

Section: Da Ne and Kloementioning

confidence: 99%

“…The absolute values of all of the systematic uncertainties on R 10 and R γ , the integral of (6) for E γ > 10 MeV, are listed in Table 2; the statistical uncertainties, 1% and 4.5% fractional respectively, are reported for comparison. All of the sources of systematic error are discussed below.…”

Section: Systematic Errorsmentioning

confidence: 99%

Precise measurement of Γ(K→e ν(γ))/Γ(K→μ ν(γ)) and study of K→e ν γ

Ambrosino

Antonelli

et al. 2009

Eur. Phys. J. C

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We present a precise measurement of the ratio) and a study of the radiative process K → eνγ , performed with the KLOE detector. The results are based on data collected at the Frascati e + e − collider DA NE for an integrated luminosity of 2.2 fb −1 . We find R K = (2.493 ± 0.025 stat ± 0.019 syst ) × 10 −5 , in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate d (K → eνγ )/dE γ for photon energies 10 < E γ < 250 MeV. Results are compared with predictions from theory.PACS 13.20.Eb a

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“…The column Selection includes the efficiency of the trigger, the background filter and the data filters described in sections 4 and 5.1. The trigger efficiency is controlled by comparison of the calorimeter trigger with a complementary trigger based on the drift chamber hit patterns [30]. A sample of unfiltered data is used to control the filter efficiency.…”

Section: Reconstruction Ofmentioning

confidence: 99%

Measurement of η meson production in γγ interactions and Γ(η → γγ) with the KLOE detector

Babusci¹,

Badoni²,

Balwierz-Pytko³

et al. 2013

J. High Energ. Phys.

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We present a measurement of η meson production in photon-photon interactions produced by electron-positron beams colliding with √ s = 1 GeV. The measurement is done with the KLOE detector at the φ-factory DAΦNE with an integrated luminosity of 0.24 fb −1 . The e + e − → e + e − η cross section is measured without detecting the outgoing electron and positron, selecting the decays η → π + π − π 0 and η → π 0 π 0 π 0 . The most relevant background is due to e + e − → ηγ when the monochromatic photon escapes detection. The cross section for this process is measured as σ(e + e − → ηγ) = (856 ± 8 stat ± 16 syst ) pb. The combined result for the e + e − → e + e − η cross section is σ(e + e − → e + e − η) = (32.72 ± 1.27 stat ± 0.70 syst ) pb. From this we derive the partial width Γ(η → γγ) = (520 ± 20 stat ± 13 syst ) eV. This is in agreement with the world average and is the most precise measurement to date.

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The trigger system of the KLOE experiment

Cited by 89 publications

References 2 publications

Measurement of the η→3π0 slope parameter α with the KLOE detector

Measurement of the η→3π0 slope parameter α with the KLOE detector

Precise measurement of Γ(K→e ν(γ))/Γ(K→μ ν(γ)) and study of K→e ν γ

Measurement of η meson production in γγ interactions and Γ(η → γγ) with the KLOE detector

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