A RICH Detector for CLAS12 Spectrometer

A RICH detector for strangeness physics in Hall A at Jefferson Lab

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2004.03.041 ◽

2004 ◽

Vol 525 (1-2) ◽

pp. 163-167 ◽

Cited By ~ 7

Author(s):

F Cusanno ◽

F Garibaldi ◽

E Cisbani ◽

S Colilli ◽

G De Cataldo ◽

...

Keyword(s):

Jefferson Lab ◽

Rich Detector

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Design and test results of the AMS RICH detector

Nuclear Physics B - Proceedings Supplements ◽

10.1016/s0920-5632(03)91007-3 ◽

2003 ◽

Vol 125 ◽

pp. 303-307 ◽

Cited By ~ 5

Author(s):

D. Casadei

Keyword(s):

Test Results ◽

Rich Detector

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MEASUREMENT OF POLARIZED QUARK DISTRIBUTIONS AT HERMES

International Journal of Modern Physics A ◽

10.1142/s0217751x03014502 ◽

2003 ◽

Vol 18 (08) ◽

pp. 1185-1192

Author(s):

◽

STEFAN BERNREUTHER

Keyword(s):

Cross Section ◽

Kinematic Range ◽

Spin Asymmetries ◽

Double Spin ◽

Hermes Experiment ◽

Down Quark ◽

Up Quark ◽

Rich Detector ◽

The Individual ◽

Quark Flavors

The HERMES experiment has measured double spin asymmetries in the cross section for deep–inelastic scattering of longitudinally polarized positrons on longitudinally polarized 3 He (1995), 1 H (1996/97), and 2 D (1998) targets. A kinematic range of 0.023 < x < 0.6, and 1 GeV 2 < Q2 < 15 GeV 2 has been covered. From these asymmetries, based on inclusive and semi–inclusive measurements, polarized quark distributions are extracted as a function of x for up [Formula: see text] and down [Formula: see text] flavors as well as for valence and sea quarks. In the measured range, the up quark polarization is positive while the down quark polarization is negative. The sea quark polarization is compatible with zero. In this analysis all sea quark polarizations have been assumed to be flavor symmetric. Presently HERMES is analyzing a high statistics 2 D data sample taken in 1999-2000. For these data it is possible to identify pions and kaons with a RICH detector which was installed in 1998. This will enable an extraction of the individual sea quark flavors [Formula: see text], [Formula: see text], and [Formula: see text] without any symmetry assumptions.

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