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Event Rate Calculations

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Cross Section References

Xscns water.gif Xscns argon.gif

Need to check: nue-16O, NC nubar

GLoBES

Todo list

AB=Alex Beck; FB=Farzan Beroz; RC=Rachel Carr; ZM=Zander Moss; DR=Diane Reitzner; KS=Kate Scholberg

Blue is completely done

Red is high priority

Orange is lower priority: need by end of study

Grey is lowest priority-- should do eventually

Channel Cross-section Smearing Post-smearing efficiencies
Interaction products Energy resolution
IBD Provided by RC; [Ref] Simple model Enu-1.3 MeV;will refine Provided by AB for SK1/SK2 [Ref]; updated for WCsim by ZM, AB Provided by AB for SK1/SK2; updated for WCsim by ZM, AB
Neutrino-electron elastic scattering Provided by RC; [Ref] Provided by RC AB for energy resolution of scattered electron for SK1/SK2;updated for WCsim by ZM, AB Provided by AB for SK1/SK2; updated for WCsim for ZM/AB
O-16 CC nue+O->e- + F Provided by RC; [Ref] Simple model Enu-15.4 MeV Provided by AB for SK1/SK2 ; updated for WCsim by ZM/AB Provided by AB for SK1/SK2; updated for WCsim by ZM/AB
O-16 CC nuebar+O->e+ + N Provided by AB; [Ref] Simple model Enu-10.3 MeV Provided by AB for SK1/SK2; updated for WCsim by ZM/AB Provided by AB for SK1/SK2; updated for WCsim by ZM/AB
O-18 CC nue+O->e- + F
O-16 NC nux + O -> nux+ X + gamma Provided by RC; [Ref] DR for gamma distribution AB, FB, ZM for detector response with WCsim; need further WCsim checks AB for response SK1/SK2; updated for WCsim by AB
Ar-40 CC nue + Ar -> e- + K Provided by AB; [Ref] Simple model for lepton, Enu-1.5 MeV; deexcitation gammas provided by DR;[Ref]; adding in gamma energy AB [Icarus ref]; need update for LBNE Assuming 5 MeV threshold; eventually need refined info
Ar-40 CC nuebar + Ar -> e+ + Cl Provided by AB; [Ref] Simple model for lepton, Enu-6.5 MeV (guessed ?); deexcitation gammas unknown AB [Icarus ref]; need update for LNBE Assuming 5 MeV threshold; eventually need refined info
Ar-40 NC nux + Ar -> nux + X + gamma Provided by AB; [From plot; no source ref] No info No info No info
Others? e.g other isotopes excitations, p/n emission...


Energy in the detector is the total energy an electron would have (i.e. including rest mass energy of an electron). For LAr, we assume gammas are visible and they are included in the interaction product energy.

Example output

Event rate calculations using GLoBES front end.

The fluxes are in neutrinos per cm^2 per 0.2 MeV bin per time interval.

Green: sum of numu, nutau, numubar, nutaubar; Red: nue; Black: nuebar

Event rate plots are for SK1 parameters, 100 kton mass. They show events per 0.5 MeV bin.

Solid (left): events detected per neutrino energy.

Dashed(right): events per detected energy, after energy smearing and efficiency. This is the distribution that would be observed. (Smearing in GLoBES includes product distribution and detector resolution.)

Black: IBD; Red: elastic scattering, all flavors; Green: nue on 16-O;Blue: nuebar on 16-O; Cyan: NC excitation events on 16-O, sum of all; Magenta: total


These plots are for Jim Kneller's flux file, integrated over the full time interval:

Flux kneller.gif Interaction rates kneller 100kt.gif Smeared rates kneller 100kt.gif Interaction rates kneller ar17.gif Smeared rates kneller ar17.gif


Talk from INT LBNE Physics workshop: INT talk

SVN repository info

BNL SVN repository info

To get the code, first request access from Brett Viren as per instructions from link above

svn co https://lbne.bnl.gov/svn/snbtg/event_rates