(r24) UpgradeSimulationProductions < LHCb

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---+!! <font color="#b22222"> *Centrally Produced Simulation samples for Upgrade studies* </font>

A set of reference samples are centrally produced for studies of the upgrade detectors. They comprise smallish samples for specific detectors, tracking and particleID evaluation and later on a few reference key physics channels to study the impact of the technology choices across the range of the LHCb physics programme.

%TOC%

---++ Reference physics channels

At this early stage, a subset of the physics channels has been identified to be used to test the production chain and develop the reconstruction algorithms. 
These are the following channels: 
   * Bs0&#8594;&#966;&#966;
   * B0&#8594;K*0&#956;&#956;
   * D*+&#8594;D0(&#8594;KS&#960;+&#960;–)&#960;+
   * Bs0&#8594;&#966;&#947;.

---++ Beam conditions
Upgrade simulations are made for collisions of 7+7 <nop>TeV protons, with 25 ns spaced bunches and 2808 filled bunches.

The crossing angle is assumed to be 
<latex title="hor angle">\mp 135 \mu rad</latex> horizontal (beam1/beam2) due to the LHCb magnet (field pointing down) and related MBXW compensator and MBXWS correctors. The sign on the angle is flipped in the case of field pointing up. 
An external vertical crossing angle of 
<latex title="ver angle">+ 100 \mu rad </latex> is assumed to ensure no parasitic collisions occurs in the Long Straight Section (LSS8).

Initially only one of the polarity of the magnet will be simulated, magnet down. Only for very special studies the other polarity will also be produced.

<latex title="beta"> \beta^{*}</latex> and <latex title="emittance">\varepsilon_{n}</latex> 
 are not yet known and are related to the virtual Luminosity needed at the start of fill and to the procedure that will be used for the luminosity leveling during the fills.  Since <latex title="beta">\beta^{*}</latex> may vary between 3 and 15 m, in order to simulate the most difficult conditions to reconstruct a <latex title="beta">\beta^{*} = 3 m</latex> is chosen since it will give a narrower primary vertex transverse distributions. A normalized emittance of <latex title="emittance">\epsilon_{n} = 2 \mu m</latex> is chosen as it may be possible to reach after LS2 and also makes for a smaller beam size.

The number of total/visible collisions per bunch crossing, <latex title="nint">\nu / \mu</latex> will depend of the chosen constant Luminosity it will be decided to run the Upgrade detector. In order to cover both the initial and what is at the moment considered the ultimate luminosity a few central samples will be produced for both <latex title="lumi">\nu = </latex> 3.4 and 6.8 corresponding to a Luminosity of <latex title="lumi">1 </latex> and <latex title="lumi"> 2 \times 10^{33} cm{-2} s{-1} </latex> with 2684 colliding bunches (2808 filled bunches - 164 not colliding in IP8), 25 ns bunch spacing, <latex title = "freq"> f_{rev} = 11.245 kHz</latex>) and a total cross section from Pythia of <latex title="xsec"> 102 mbarn</latex>. 

An explanation of <latex title="nint">\nu, \mu</latex> and their relations is available at [[https://twiki.cern.ch/twiki/bin/view/LHCb/NuMuPileUp][this page]].

---++ Detectors configurations
A few different detectors configuration are produced and can be found in the book-keeping via part of the name of the =*Simulation Conditions*=. A full explanation is given in the description of the simulation conditions itself.

The following possible options and their combinations are currently available of which the subset to be simulated is extracted: 
   * Current Velo, Velo Pixels (VP), Velo Light Strips (VL)
   * RICH1 without Aerogel and with PMTs
   * Current TT, Upstream Tracker (UT)
   * Magnetic field as in current detector
   * Beam pipe as in current detector, or with lighter SF2 and SF3 supports
   * IT and OT as in current detector, Fiber Tracker covering whole T stations (FT)
   * RICH2 with PMTs
   * Calorimeters as in current detectors, or in Gauss it is also possible to switch off SPD and PRS
   * Muon System as in current detector
   * Upstream region (BLS+BCM, RB84) and Downstream region (RB86) as in current detector (not normally simulated)
   * Infrastructure as in current detector (not normally simulated)

---++ Processing steps

Initially only =sim= files (i.e. the output of Gauss) will be produced. As soon as Boole will be ready also =xdigi= files can be made. Eventually once A first version of Brunel will be ready =dst= (or =xdst=) files for physics channels to be processed by the physics analysis will be produced.

An explanation of the various files types is available in [[http://lhcb-release-area.web.cern.ch/LHCb-release-area/DOC/gauss/doc/FileTypes.php][this page]]


---++ List of samples to be or being produced.

The following samples will be produced to evaluate and compare the performance of different detector technologies.

%EDITTABLE{cellspacing="2" headerbg="#0000CD" databg="#FDFCDC, #FFFFFF", format="text, 20 | text, 20 | text, 20 | select, 1, tbd, nu=3.4 and no spillover, nu=6.8 and no spillover,  nu=3.4 with spillover, nu=6.8 with spillover, nu=0.7 with no spillover | text, 20 | select, 1, sim, gen, xgen, xdigi, digi, dst, xdst | text, 40 | text, 40 | text, 40 |" changerows="on"}%
| *<nop>EventType* | *<nop>Channel (DecFiles)* | *Detector configuration* | *Beam Conditions* | *No. of events* | *Output type* | *Purpose* | *Status* | *Location* |
| 13104011 | Bs_phiphi=DecProdCut | VP + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | xdigi | tracking studies  all algorithms | DONE request 10329 | MC/Upgrade/Beam7000GeV-Upgrade.VP.UT.FT.MagDown-Nu3.4... |
| 13104011 | Bs_phiphi=DecProdCut | VP + UT +  FT + without aerogel | nu=6.8 and no spillover | 10k | xdigi | tracking studies  all algorithms | DONE request 10327 | MC/Upgrade/Beam7000GeV-Upgrade.VP.UT.FT.MagDown-Nu6.8... |
| 13104011 | Bs_phiphi=DecProdCut | VL + UT + FT  + without aerogel | nu=3.4 and no spillover | 10k | xdigi | tracking studies all algorithms | DONE request 10336 | MC/Upgrade/Beam7000GeV-Upgrade.VL.UT.FT.MagDown-Nu3.4... |
| 13104011 | Bs_phiphi=DecProdCut | VL + UT + FT  + without aerogel | nu=6.8 and no spillover | 10k | xdigi | tracking studies all algorithms | DONE request 10333 | MC/Upgrade/Beam7000GeV-Upgrade.VL.UT.FT.MagDown-Nu6.8... |
| 13104011 | Bs_phiphi=DecProdCut | VP + UT + FT + without RICH1 | nu=3.4 and no spillover | 10k | xdigi | tracking studies all algorithms | DONE request 10338 | MC/Upgrade/Beam7000GeV-Upgrade.VP.UT.FT.noRich1.MagDown-Nu3.4... |
| 13104011 | Bs_phiphi=DecProdCut | VP + UT + FT + without RICH1 | nu=6.8 and no spillover | 10k | xdigi | tracking studies all algorithms | DONE request 10340 | MC/Upgrade/Beam7000GeV-Upgrade.VP.UT.FT.noRich1.MagDown-Nu3.4... |
| 27165100 | Dst_D0pi,KSpipi,DecProdCut | VP + UT + FT (no preference for  rich) | nu=3.4 and no spillover | 10k | xdigi | tracking studies, especially downstream tracking | DONE request 10330 | MC/Upgrade/Beam7000GeV-Upgrade.VP.UT.FT.MagDown-Nu3.4... |
| 27165100 | Dst_D0pi,KSpipi,DecProdCut | VP + UT + FT (no preference for  rich) | nu=6.8 and no spillover | 10k | xdigi | tracking studies, especially downstream tracking | DONE request 10326 | MC/Upgrade/Beam7000GeV-Upgrade.VP.UT.FT.MagDown-Nu3.4... |
| 27165100 | Dst_D0pi,KSpipi,DecProdCut | VL + UT + FT (no preference for  rich) | nu=3.4 and no spillover | 10k | xdigi | tracking studies, especially downstream tracking | DONE request 10335 | MC/Upgrade/Beam7000GeV-Upgrade.VL.UT.FT.MagDown-Nu3.4... |
| 27165100 | Dst_D0pi,KSpipi,DecProdCut | VL + UT + FT (no preference for  rich) | nu=6.8 and no spillover | 10k | xdigi | tracking studies, especially downstream tracking | DONE request 10332 | MC/Upgrade/Beam7000GeV-Upgrade.VL.UT.FT.MagDown-Nu3.4... |
| 30000000 | minimum bias | VP + UT + FT  (no preference  for rich) | tbd | 1M (10 M would be even better) | xdst | trigger timing and retention | %ICON{watch}% on hold until tracking algorithms are more advanced | |
| 27173003 | Dst_D0pi,mumu=DecProdCut,CutsForDstar | Reference | nu=0.7 with no spillover | 100k | xdst | tt studies | %ICON{watch}% on hold until the relevant DecFiles and AppConfig are released | |
| 13104013 | Bs_phiphi=CDFAmp,DecProdCut,hpt400 | VP + UT +  large IT + OT + without aerogel | nu=3.4 with spillover | 10k | sim | once geometry is ready | %ICON{choice-no}% geometry not yet available | |
| 13144002 | Bs_Jpsiphi,mm=CPV,DecProdCut | VP + UT +  FT + without aerogel | tbd | 10k | xdigi | VP life time bias studies | | |
| 13104013 | Bs_phiphi=CDFAmp,DecProdCut,hpt400 | VP + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |
| 27165100 | Dst_D0pi,KSpipi,DecProdCut | VP + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |
| | Bd_Kstmm=DecProdCut | VP + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |
| 13102201 | Bs_phigamma=DecProdCut | VP + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |
| 30000000 | minimum bias | VP + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |
| 13104013 | Bs_phiphi=CDFAmp,DecProdCut,hpt400 | VL + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |
| 27165100 | Dst_D0pi,KSpipi,DecProdCut | VL + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |
| 13102201 | Bs_phigamma=DecProdCut | VL + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |
| | Bd_Kstmm=DecProdCut | VL + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |
| 30000000 | minimum bias | VL + UT +  FT + without aerogel | nu=3.4 and no spillover | 10k | dst | first set of channels for UPT document | %ICON{watch}% on hold until brunel released + dst tested | |

The previous sim-only request information is archived [[https://twiki.cern.ch/twiki/bin/view/LHCb/UpgradeSimulationProductions?rev=14#List_of_samples_to_be_or_being_p][here]].
The previous xdigi request info is archived [[https://twiki.cern.ch/twiki/bin/view/LHCb/UpgradeSimulationProductions?rev=19#List_of_samples_to_be_or_being_p][here]].

-- _Last updated_: Main.PaulSzczypka - 03-Feb-2013
Topic revision: r24 - 2013-02-28 - SeanBenson
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