Tel"Aviv,"5."Jan."2014" 1"
Physics landscape at the end 1970s • Parton model for proton -> partons are fractionally charged quarks (gluons postulated) Z 1 ε ≈ 0.5 x · [ u ( x ) + u ( x ) + d ( x ) + d ( x )] dx = 1 − ε 0 • Charm quark was discovered • QCD, a theory for strong interaction • Neutrinos may have mass and oscillate Tel"Aviv,"5."Jan."2014" 2"
Physics with neutrinos • Neutrino ( ν µ ) beam • CDHS(W) experiment • EW physics – Weinberg angle – charm production • QCD – Structure of proton – “Scaling violation” -> gluon radiation – Strong coupling constant • Search for neutrino oscillations Tel"Aviv,"5."Jan."2014" 3"
SPS Neutrino beam (1977-1998) <44444444444444444444444444444444"880"m"""4444444444444444444444444444>" Fig. 24. Beam layouts at SPS. van"der"Meer"horn" Tel"Aviv,"5."Jan."2014" 4"
SPS Neutrino beam 2 types: Wide-Band Beam and Narrow-Band Beam Energy"spectrum" NBB" Energy""vs"radius"at"detector" Tel"Aviv,"5."Jan."2014" 5"
The CDHS Experiment 1977-1985 1977479:" CERN" Dortmund" Heidelberg" Saclay" ~ 35 members " 1980485:"" "CDHSW"(+Warsaw)" • •"20"m"long" •"1.8"m"radius" • •"1200"t""iron" •"19"driI"chambers" • •"1500"scinKllators" •"3000"PMs" Tel"Aviv,"5."Jan."2014" 6" John"Rander"
Fe-scintillator calorimeter ~ 3000 photomultipliers + 19 drift chambers interleaved. Magnetized iron Tel"Aviv,"5."Jan."2014" 7"
Events in the detector ν +"N"4>" µ "+"X" charged"current"(W"exchange)" ν +"N"4>" ν "+"X" neutral"current"(Z"exchange)" ν +"N"4>" µ + "+" µ � +"X" CC""+""charm"decay" Tel"Aviv,"5."Jan."2014" 8" F."Eisele"
Some Team members Tel"Aviv,"5."Jan."2014" 9"
CERN Competition in same ν beam • BEBC 1976-84 • CHARM -> NC 1979-84 Tel"Aviv,"5."Jan."2014" 10"
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