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New Approaches to High Transverse Momentum Physics: Tackling Mysterious Transitions Below 20 GeV

This study addresses significant gaps in high and medium transverse momentum (pT) data for energies between 24 and 200 GeV, highlighting a mysterious transition around 80-90 GeV that shifts spectra from convex to concave shapes. We explore the energy thresholds for jet quenching and the emergence of the Cronin effect in proton-nucleus (pA) interactions, emphasizing the need for further measurements. Additionally, the production of Upsilon particles near 9.5 GeV poses interesting challenges. The investigation will utilize advanced techniques to achieve high precision under extreme conditions.

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New Approaches to High Transverse Momentum Physics: Tackling Mysterious Transitions Below 20 GeV

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  1. Mozaic trigger system for high transverse momentum physics Elso Dddd Ddd Ffffffffffffff Dddddddddd Ddddddddd Ddddddd

  2. Motivation for new measurements below = 20 GeV Practically no high or medium Pt data between Einc = 24 and 200 GeV Mysterious transition around 80-90 GeV: convex versus concave spectra Energy threshold for Jet-quenching? Emergence of Cronin-effect in pA interactions is completely unknown energy dependence centrality dependence particle type dependence particle correlations Production of Upsilon (9.5 GeV) particles near the threshold. Practically no high or medium Pt data between Einc = 24 and 200 GeV Mysterious transition around 80-90 GeV: convex versus concave spectra Energy threshold for Jet-quenching? Emergence of Cronin-effect in pA interactions is completely unknown energy dependence centrality dependence particle type dependence particle correlations Production of Upsilon (9.5 GeV) particles near the threshold.

  3. Beier (1978) NA49 (CERN) results at 158 FODS (IHEP) at 70 GeV

  4. Special requirements for Y-> e+e- and high pT Extremely high intensity - Pile-up Segmented multi-target - Relaxed vertex precision Straight tracks - High momentum tracks DREAM: 109 interactions/sec

  5. High ( > 5 GeV/c ) momentum  Straight track x,y [cm] Px=Py= 3 GeV/c Pz = 10 GeV/c Px=Py = 1 GeV/c; Pz= 5 GeV/c z [cm]

  6. MAPS vs Hybrid Vertex resolution: dz = 1 mm, dx,dy= 0.05 mm High intensity: radiation hard Practical 4+ 2 + 3 = 9 planes ( 4 Hybrids + 5 strips) Selectivity depends on the availability of TOF information

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