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2:00 o’clock

4:00 o’clock 6:00 o’clock

8:00 o’clock PHOBOS

10:00 o’clock BRAHMS

STAR

PHENIX RHIC

AGS LI NAC BOOSTER

TA NDEMS Pol. Proton Source

High Int. Proton Source

Design Parameters:

Beam Energy = 100 GeV/u No. Bunches = 57 No. Ions /Bunch = 1× 10 9 T store = 10 hours L ave = 2 × 10 26 cm -2 sec -1 9 GeV/u

Q = +79

1 MeV/u Q = +32

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η

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0 100 200 300

400 19.6 GeV

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0 200 400 600

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WA98 E814/877

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STAR PHENIX PHOBOS BRAHMS

Model prediction for = 29 MeV µ b

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Central Au+Au @ 200 GeV RHIC data preliminary

PHENIX STAR PHOBOS BRAHMS Hydro Kolb, Rapp, PRC 67 044903 (2003)

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× 60-70% _-8

Au+Au, p+p h ⁺ + h- --- 2

10 ^-10 10 ^-9 10 ^-8 10 ^-7 10 ^-6 10 ^-5 10 ^-4 10 ^-3 10 ^-2 10 ^-1 1 10 10 ² 10 ³

10 ^-7 10 ^-6 10 ^-5 10 ^-4 10 ^-3 10 ^-2 10 ^-1 1 10 10 ²

p _T (GeV/c)

p _T (GeV/c)

) φ ∆ dN/d( TRIGGER 1/N ^1.4