τ → e γ,   τ → μ γ

Contributor

Links

• HyperNews posting: Trigger Statistics Survey : Search for tau->e/mu gamma LFV decays

Signal Modes

: Mode : Decfile               : Generator : Filter : Run Type                                :
: 3982 : tau_kk2f_0_1_25_1.tcl : continuum :        : tau+ -> generic tau- -> e-gamma (KK2F) :
: 3983 : tau_kk2f_0_1_25_2.tcl : continuum :        : tau+ -> generic tau- -> mu-gamma (KK2F) :
: 3984 : tau_kk2f_25_1_0_1.tcl : continuum :        : tau+ -> e+gamma tau- -> generic (KK2F) :
: 3985 : tau_kk2f_25_2_0_1.tcl : continuum :        : tau+ -> mu+gamma tau- -> generic (KK2F) :

Cuts

• 1-1 or 1-3 topology based on number of GoodTracksVeryLoose
• At least 1 photon with CM energy > 200 MeV in the hemisphere with the one GTVL
• Signal track passes eMicroVeryTight (muNNTight) for e (μ) search
• Highest CM momentum track on other side fails eMicroLoose (muNNVeryLoose) [This is called the tag track]
• Signal and tag tracks have CM momentum < 4.5 GeV
• No extra photons with lab energy > 100 MeV in signal hemisphere
• Total tag side invariant mass < 1.6 GeV
• |Missing mass-sqared| < 1 GeV² in tag side hemisphere
• -Log[(Missing P_t)/(E_beam)] < 2.5
• -0.76 < CosTheta(Missing Momentum) < 0.92
• 0.900 < Thrust < 0.975
• 1.5 < M_ec < 2.1 GeV
• -1.0 < ΔE < 0.5 GeV
• Efficiency: 13.6% SP-3982, 11.7% SP-3983, 13.7% SP-3984, 11.8% SP-3985

Files

ntpTrg_CCC_RunN-1.*

CCC can be emg for SP-3982, mmg for SP-3983, epg for SP-3984, and mpg for SP-3985.

 Name                    Last modified      Size  Description
 SP9plots/               19-Nov-2007 10:30    -   
 SUMMARY                 07-Nov-2006 12:11   11K  
 header.inc              07-Dec-2007 13:09  8.9K  
 plots/                  05-Dec-2006 16:31    -   
 results/                05-Dec-2006 16:31    -