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MARS15 calculations

For the 1.5-TeV Muon Collider

Two files mupl-1e3x500-26m-lowth-excl and mumi-1e3x500-26m-lowth-excl contain background in \(IP\) coming from \(\mu+\) (-25 to 1m) and \(\mu-\) (25 to -1 m) arcs.

  • NDECAY = 103x500 = 5*105 is number of simulated decays.

  • Thresholds - 100 keV for charged hadrons,muons, electrons,positrons and gammas, and 10-12 GeV for neutrons.

Particles were collected on interface surface (shielding nozzle etc.)

Every row consists of:
name NI JJ X Y Z PX PY PZ TOFF W ZDEC XORIG YORIG ZORIG WORIG EORIG IORIG KORIG
FORMAT I11 I7 F11.3 F11.3 F11.3 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 I7 I3
  • NI - history number
  • JJ - particle ID, reaching detector
  • X,Y,Z - coordinates on interface surface (cm)
  • PX,PY,PZ - momentum components (GeV/c)
  • TOFF - time with respect to bunch crossing.
  • W - particle weight.
  • ZDEC - decay coordinate along beam line.
  • XORIG,YRIG,ZORIG - coordinate of particle origin (cm),
  • WORIG,EORIG,IORIG - weight, energy, particle ID of particle origin
  • KORIG - type of process in which particle were created

PARTICLE ID:

ID name ID name ID name ID name
1 p 11 e + 21 nuae 31 nbar
2 n 12 pbar 22 K0L 32 KSI0
3 pi+ 13 pi0 23 K0S 33 KSI-
4 pi- 14 d 24 K0 34 OM-
5 K+ 15 t 25 AK0 35 sib-
6 K- 16 He3 26 LAM 36 si0b
7 mu+ 17 He4 27 ALAM 37 sib+
8 mu- 18 num 28 SIG+ 38 AKSI0
9 g 19 nuam 29 SIG0 39 ksib+
10 e- 20 nue 30 SIG- 40 omb+

Weight in files is 26 (26 m).

To get normalization per bunch you should correct weight:

\[W_{final} = \frac{W*4.2788*10^5}{NDECAY}\]

For the 125-GeV Higgs Factory Muon Collider

SS, NM, IT (2014)

File mumi-5e6-40m-lowth contains background in \(IP\) coming from the positive z-side for a 62.5 GeV \(\mu-\) beam (z= 30 to -10 m collider region).

  • NDECAY = 5.1335*106 is a number of simulated decays.
  • Thresholds - 100 keV for charged hadrons,muons,electrons, positrons and gammas, and 10-12 GeV for neutrons.

Particles were collected on the MDI surface (shielding nozzle etc.)

Every row consists of
name NI JJ X Y Z PX PY PZ TOFF W ZDEC XORIG YORIG ZORIG WORIG EORIG IORIG KORIG
FORMAT I11 I7 F11.3 F11.3 F11.3 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 1PE14.6 I7 I3
  • NI - history number
  • JJ - PID, reaching detector
  • X,Y,Z - coordinates on interface surface (cm)
  • PX,PY,PZ - momentum components (GeV/c)
  • TOFF - time with respect to the bunch crossing
  • W - particle statistical weight
  • ZDEC - decay coordinate along the beam line
  • XORIG,YRIG,ZORIG - coordinates (cm) of particle origin
  • WORIG,EORIG,IORIG - weight, energy, PID of the parent particle
  • KORIG - type of process in which the particle was created

MARS15 PARTICLE ID:

ID name ID name ID name ID name
1 p 11 e + 21 nuae 31 nbar
2 n 12 pbar 22 K0L 32 KSI0
3 pi+ 13 pi0 23 K0S 33 KSI-
4 pi- 14 d 24 K0 34 OM-
5 K+ 15 t 25 AK0 35 sib-
6 K- 16 He3 26 LAM 36 si0b
7 mu+ 17 He4 27 ALAM 37 sib+
8 mu- 18 num 28 SIG+ 38 AKSI0
9 g 19 nuam 29 SIG0 39 ksib+
10 e- 20 nue 30 SIG- 40 omb+

All weights in the file W = 40 (related to 1 decay/m rate over 40 meters)

To get normalization per bunch (2*1012 muon/bunch), modify it as:

\[W_{bunch} = \frac{W*5.1335*10^6}{NDECAY}\]