WimpSim data files

Below you will find results form runs with WimpSim 3.03 and nusigma 1.17 (or rather pre-releases of the code with equivalent physics). The code is run for 10 million annihilations for 22 different masses from 3 GeV to 10 TeV and for several different annihilation channels. This is done for the PDG 2012 oscillation scenario. For the actual detector, we focused on IceCube at the South Pole, even if the results would not change significantly for any other detector.

The data files below can be used to e.g. read in the results into a computer programme. Note that the next release of DarkSUSY will contain routines to do exactly this.

Description of the WimpAnn data files

The wimpann data files contain the yields for all the neutrino flavours at creation in the Sun, at R_sun and at 1 AU. They also contain the results at creation in the Earth. For each mass and annihilation channel, there exists two summary files, one for the Sun and one for the Earth. E.g., for 250 GeV neutralinos annihilating to tau+ tau-, we have the two files wa-m250-ch4-earth-sum.dat and wa-m250-ch4-sun-sum.dat. Each of these files contains a header stating information about the run (like versions of programs used, oscillation parameters and date). For the Earth and the Sun, the information below the header is described below.

WimpAnn data files - Earth

After the header, the earth summary files contains six lines, with 200 numbers each. These numbers are the differential yield, dN/dz in 200 bins at z=0.0025, 0.0075, ..., 0.9975. z is the neutrino energy fraction in units of the WIMP mass, z=E_nu/m_WIMP. The six lines are for the six different (anti)neutrino flavours 1-6, given in Table 1.

WimpAnn data files - Sun

For the Sun, the summary files contain roughly the same information, but now we have neutrinos sampled at different locations. Hence, there are now 30 lines after the header. Each one contains the differential neutrino yield dN/dz in 200 bins z=0.0025, 0.0075, ..., 0.9975 as before. The meaning of the different lines are

• Lines 1-6: Neutrino yields at creation at the center of the Sun for neutrino 1-6
• Lines 7-12: Neutrino yields at the surface of the Sun (R_sun) for neutrino 1-6
• Lines 13-18: Neutrino yields at 1 AU for neutrino 1-6
• Lines 19-24: Neutrino yields from secondary neutrinos at the surface of the Sun (R_sun) for neutrino 1-6. Note that these yields only include the contribution from decay of tau+/tau- that arise in nu_tau/nu_tau-bar charged current interactions on the way out of the Sun. The neutrino yields on lines 7-12 on the other hand include the TOTAL neutrino yields (both the primary component arising from the propaged neutrinos from the center and the secondary component).
• Lines 25-30: Neutrino yields from secondary neutrinos at 1 AU for neutrino 1-6. Note that these yields only include the contribution from decay of tau+/tau- that arise in nu_tau/nu_tau-bar charged current interactions on the way out of the Sun. The neutrino yields on lines 13-18 on the other hand include the TOTAL neutrino yields (both the primary component arising from the propaged neutrinos from the center and the secondary component).

Note that the yields given above are projected out on flavour eigenstates. In reality though, we keep all the amplitudes and phases, so the yields above are mainly given for illustrative purposes.

Description of the WimpEvent data files

These result files are based on runs of WimpEvent on the event files (not given for download as they are too big) created by the WimpAnn runs. These files contain contain results for a specific detector where we have chosen to focus on IceCube at the South Pole. In practice though, the oscillation effects for the passage through the Earth are not very important and the actual detector location chosen is not of big importance.

For each mass and annihilation channel, there are now a number of different result files, depending on what kind of process that are of interest. In addition, there are 1D files that are differential in energy only and 2D files that are differential in both energy and angle. The general layout of a 1D file is that it contains a header explaining the run info (as for the WimpAnn files) and then follows 6 lines that give dN/dz in 100 bins z=0.005, 0.015, ..., 0.995. However, the yields are now not only for neutrinos, but also for the corresponding charged leptons and hadronic showers (see more info below) that are created at the neutrino-nucleon interaction. The 2D files contain 50 lines for each neutrino (or charged lepton or hadronic shower) type. Each line is for one of 50 bins in z=0.01, 0.03, ..., 0.99. Each line contains 91 values corresponding to d^2N/dz dtheta, where theta is binned in 91 bins from 0 to 30° and the meaning of theta is the angle from the center of the Sun or the center of the Earth. The theta bins are as follows

• The first 50 bins are for theta=0.1°, 0.3°, ..., 9.9°
• The next 40 bins are for theta=10.25°, 10.75°, ..., 29.75°
• The final bin in theta are for theta>30°

Furthermore, both the 1D files and the 2D files are available both for the differential yield (as outlined above), but also for the integrated yield up to a given theta and above a given energy. For the integrated yields, the lower limit of each energy bin and the upper limit of each theta bin are used, otherwise, the bin numbering is the same as above.

So, this is how the results look like for a given process. The different processes that are summarized in these kind of files are

• Process 1. Neutrino yields. In this case the six different lines in the 1D files (or the six different sets of 50 lines (corresponding the the different z-bins) for the 2D files) correspond to each of the neutrino types in Table 1. These yields are at the detector and the units are cm^-2 annihilation^-1.
• Process 2. Charged lepton yields at the neutrino-nucleon vertex. The leptons are the ones corresponding to the neutrinos in Table 1 (i.e. e-, e+, mu-, mu+, tau- and tau+ for index 1-6). These yields are at the detector and the units are cm^-3 annihilation^-1.
• Process 3. Charged lepton yields at an imaginary plane at the detector. Compared to process 2, these yields have been propagated and the leptons have undergone both energy losses and multiple Coulomb scattering. Note that since electrons are stopped essentially immediately and tau leptons decay almost immediately, only mu- and mu+ are included in these files. The units are cm^-2 annihilation^-1.
• Process 4. Hadronic shower yields. The energy and angle here refers to the total hadronic shower energy and direction. We give the hadronic shower separately for each parent type neutrino, as given in Table 1. The showers given here are for neutrinos that have undergone charged current interaction. The units are cm^-3 annihilation^-1.
• Process 5. The same as process 4, but for neutral current interactions. The units are cm^-3 annihilation^-1.

For each of these processes there are 8 different files (Earth/Sun, 1D/2D, differential or integrated). The naming convention of the files are that they are called:

we-m[mass]-ch[channel]-[where]-[dimension]-[diff/int]-f[process].dat

where [mass] is the mass in GeV, channel is the number of the annihilation channel, [where] is ea or su for the Earth/Sun, [dimension] is 1D or 1D, [diff/int] is diff or int for differential or integrated yields respectively and [process] is the process number given above. For example, the differential 1D file for annihilation of 250 GeV WIMPs in the Earth to tau+ tau- (channel 11) is for process 2 called

we-m250-ch11-ea-1D-diff-f2.dat

Note. Please note that the differential yields are per degree and z, i.e. the bin size is included in the yield tables (i.e. they are not just bins filled with events).

In case you have problems, send me an e-mail:
Go back to WimpSim home page.