The CLAS Cherenkov detector

Adams, G. S.; Burkert, Volker; Carl, Richard T.; Carstens, T.; Frolov, V. V.; Houghtlin, L.; Jacobs, G.; Kossov, M.; Klusman, M.; Kross, B.; Onuk, M.; Napolitano, J.; Price, J. W.; Riggs, C.; Sharabian, Y. G.; Stavinsky, A.; Smith, L. C.; Stephens, W.; Stoler, P.; Tuzel, W.; Ullrich, Katja; Vlassov, A. V.; Weisenberger, A.G.; Witkowski, M.; Wojtekhowski, B.; Yergin, P.F.; Zorn, C.

doi:10.1016/s0168-9002(00)01313-9

Cited by 83 publications

(46 citation statements)

References 6 publications

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“…The outgoing vector mesons were reconstructed from their decay to e + e − pairs. The leptons were detected with the electromagnetic calorimeters (ECs) [35] and Cherenkov counters (CCs) [36] of the CLAS detector [37] in Hall B.…”

Section: A Detector Componentsmentioning

confidence: 99%

Light vector mesons in the nuclear medium

Wood¹,

Nasseripour²,

Weygand³

et al. 2008

Phys. Rev. C

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The light vector mesons (ρ, ω, and φ) were produced in deuterium, carbon, titanium, and iron targets in a search for possible in-medium modifications to the properties of the ρ meson at normal nuclear densities and zero temperature. The vector mesons were detected with the CEBAF Large Acceptance Spectrometer (CLAS) via their decays to e + e − . The rare leptonic decay was chosen to reduce final-state interactions. A combinatorial background was subtracted from the invariant mass spectra using a well-established event-mixing technique. The ρ-meson mass spectrum was extracted after the ω and φ signals were removed in a nearly model-independent way. Comparisons were made between the ρ mass spectra from the heavy targets (A > 2) with the mass spectrum extracted from the deuterium target. With respect to the ρ-meson mass, we obtain a small shift compatible with zero. Also, we measure widths consistent with standard nuclear many-body effects such as collisional broadening and Fermi motion.

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Section: A Detector Componentsmentioning

confidence: 99%

Light vector mesons in the nuclear medium

Wood¹,

Nasseripour²,

Weygand³

et al. 2008

Phys. Rev. C

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“…2). Pions were rejected by requiring a minimum energy of 0.06 GeV in the inner layer of the calorimeter and a pulse height in the CC corresponding to at least 2.5 photoelectrons [30,31]. The two positive tracks in the fiducial volume were identified as a proton and K + using the measured flight time (δT ∼ 160 ps) from the target to the time-of-flight counters [32], a typical distance of about 5 m. Fiducial volume cuts were made to cut out tracks in inefficient parts of the detector, and small momentum corrections were applied to compensate for uncertainties in the magnetic field and detector positioning.…”

Section: Event Reconstructionmentioning

confidence: 99%

“…The Cherenkov detector [30] is not well modeled in GSIM, and its efficiency was determined separately using the data.…”

Section: Acceptance Correctionsmentioning

confidence: 99%

Electroproduction ofϕ(1020)mesons at1.4⩽Q2⩽3
Santoro¹,
Smith²,
Garçon³
et al. 2008
Phys. Rev. C
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32
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21
2
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Electroproduction of exclusive φ vector mesons has been studied with the CLAS detector in the kinematic range 1.4 Q 2 3.8 GeV 2 , 0.0 t 3.6 GeV 2 , and 2.0 W 3.0 GeV. The scaling exponent for the total cross section as 1/(Q 2 + M 2 φ ) n was determined to be n = 2.49 ± 0.33. The slope of the four-momentum transfer t distribution is b φ = 0.98 ± 0.17 GeV −2 . Under the assumption of s-channel helicity conservation, we determine the ratio of longitudinal to transverse cross sections to be R = 0.86 ± 0.24. A two-gluon exchange model is able to reproduce the main features of the data.

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“…The Cerenkov counters consist of 216 light collection modules, 36 per sector, arranged in 18 segments in θ, covering the polar angles up to 45 • for all six sectors [66].…”

Section: Cerenkov Countermentioning

confidence: 99%

Polarisation observables for strangeness photoproduction on a frozen spin target with CLAS at Jefferson Lab

Fegan¹

2012

AIP Conference Proceedings

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The CLAS Cherenkov detector

Cited by 83 publications

References 6 publications

Light vector mesons in the nuclear medium

Light vector mesons in the nuclear medium

Electroproduction ofϕ(1020)mesons at1.4⩽Q2⩽3
Santoro¹,
Smith²,
Garçon³
et al. 2008
Phys. Rev. C
Self Cite
32
0
21
2
View full text Add to dashboard Cite

Polarisation observables for strangeness photoproduction on a frozen spin target with CLAS at Jefferson Lab

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The CLAS Cherenkov detector

Cited by 83 publications

References 6 publications

Light vector mesons in the nuclear medium

Light vector mesons in the nuclear medium

Electroproduction ofϕ(1020)mesons at1.4⩽Q2⩽3Santoro1, Smith2, Garçon3 et al. 2008Phys. Rev. CSelf Cite320212View full textAdd to dashboardCite

Polarisation observables for strangeness photoproduction on a frozen spin target with CLAS at Jefferson Lab

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Electroproduction ofϕ(1020)mesons at1.4⩽Q2⩽3
Santoro¹,
Smith²,
Garçon³
et al. 2008
Phys. Rev. C
Self Cite
32
0
21
2
View full text Add to dashboard Cite