UCSB PRV0 Information

The Channels:

• Inclusive Primary Dilepton Sample
• B -> rho l nu
• B -> pi l nu
• B -> omega l nu
• B -> X_u l nu mixture
• B -> K* gamma
• B -> K*(1273) gamma
• B -> rho gamma, B -> omega gamma
• B -> D* gamma
• B -> tau nu

Tools, methods, etc..

• We used Aslund in release 7.10.2 on OSF (at UCSB)
• The code:
  • Event dumping: DumpMc.hh, DumpMc.cc
  • Histogramming: Validation.hh, Validation.cc
  • Kumac: prod.kumac
• The event dumps include the first 10 events. The first table lists all the (Aslund) reconstructed tracks, and includes the following quantites for any given track: charge*momentum magnitude, transverse momentum, phi, theta, z₀, d₀, chi squared, number of degrees of freedom, number of DCH hits, number of SVT hits, and SVT and DCH maps (the latter 6 quantities don't mean much for Aslund tracks, of course). The second table lists StdHep tracks (or MC truth tracks if the StdHep tracks are not found), and includes the following fields: track number, track StdHep ID, name, first and last daughters, first and second mothers, the three momentum components, mass, momentum magnitude, transverse momentum, phi, theta, and the three vertex components. The dumps also include a table of Geant tracks which can be ignored in this case.
• The event displays show a typical event obtained with the generic GraDisplayApp application running off the corresponding .xdr file (generated with stand-alone bbsim in 7.10.2).
• The histrograms include the following:
  • MC truth momentum spectra for all charged and neutral tracks, as well as lepton momentum spectrum for semileptonic decays or gamma energy (in lab and CM) for radiative penguin decays.
  • MC truth cos(Theta) distributions in lab and CM for all charged and neutral tracks
  • MC truth cos(Phi) distributions in lab and CM for all charged and neutral tracks
  • MC truth Q² vs. E_{l CM} distribution, where Q² = (p_l + p_neutrino)², and E_{l CM} is the lepton energy in CM (semileptonic decays only)
  • MC truth number of charged tracks per event, number of neutrals per event, total event charge
  • MC truth deltaZ for the two B vertices
  • Aslund momentum spectrum, lepton momentum spectrum for semileptonic decays, lab cos(Theta) and phi distrubutions, for charged tracks. Note that only tracks with p_t > 50 MeV are considered.
  • Aslund number of charged tracks per event, number of neutrals per event, total event charge (all charged tracks are considered for this one, of course!)
  • Aslund momentum spectra, lab cos(Theta) and phi distrubutions, for neutrals Note that only neutrals with E > 30 MeV are considered.
  • MC truth histogram with 3 bins, where the first bin (from 0 to 1) gives one the number of B0 B0bar pairs per event, the second, the number of B0 B0 pairs, and the third, the number of B0bar B0bar pairs.

Inclusive Dilepton Sample

B⁰ -> X l⁺ nu, B⁰bar -> Y l^- nu_bar
B⁺ -> X l⁺ nu, B^-bar -> Y l^- nu_bar
(l = e or mu)

B -> rho l nu

• B^+(-) -> rho l nu

  Description:
  B⁺ -> X, B^-bar -> rho⁰ l^- nu_bar (+ charge conjugate mode)
  (l = e or mu)
  
  
  Status: 10,000 events generated/reconstructed with Aslund. 2/18/99
  
  DECAY.DEC: B+B-_rholnu.dec
  
  Event dumps: dumpfile.txt
  
  Histograms:check.ps
  
  

• B⁰(bar) -> rho l nu

  Description:
  B⁰ -> X, B⁰bar -> rho⁺ l^- nu_bar (+ charge conjugate mode)
  (l = e or mu)
  Status: 10,000 events generated/reconstructed with Aslund. 2/18/99
  
  DECAY.DEC: B0B0bar_rholnu.dec
  
  Event dumps: dumpfile.txt
  
  Histograms:check.ps
  
  
Event display: typical event

B -> pi l nu

• B^+(-) -> pi l nu

  Description:
  B⁺ -> X, B^-bar -> pi⁰ l^- nu_bar (+ charge conjugate mode)
  (l = e or mu)
  Status: 10,000 events generated/reconstructed with Aslund. 2/18/99
  
  DECAY.DEC: B+B-_pilnu.dec
  
  Event dumps: dumpfile.txt
  
  Histograms:check.ps
  
  

• B⁰(bar) -> pi l nu

  Description:
  B⁰ -> X, B⁰bar -> pi⁺ l^- nu_bar (+ charge conjugate mode)
  (l = e or mu)
  Status: 10,000 events generated/reconstructed with Aslund. 2/18/99
  
  DECAY.DEC: B0B0bar_pilnu.dec
  
  Event dumps: dumpfile.txt
  
  Histograms:check.ps
  
  
Event display: typical event

B -> omega l nu

B⁺ -> X, B^-bar -> omega l^- nu_bar (+ charge conjugate mode)
(l = e or mu)

B -> X_u l nu mixture

B⁰ -> X, B⁰bar -> X_u l^- nu_bar (+ charge conjugate mode)
B⁺ -> X, B^-bar -> X_u l^- nu_bar (+ charge conjugate mode)
(l = e or mu)

B -> K* gamma

• B^+(-) -> K* gamma

  Description:
  B⁺ -> X, B^- ->K ^*- gamma, with K^*- -> K^- pi⁰ and K^*- -> K_s⁰ pi^-, where K_s⁰ -> pi⁺ pi^- (+ charge co njugate mode)
  Status: 10,000 events generated/reconstructed with Aslund. 2/18/99
  
  DECAY.DEC: B+B-_Kstgamma.dec
  
  Event dumps: dumpfile.txt
  
  Histograms:check.ps
  
  

• B⁰(bar) -> K* gamma

  Description:
  B⁰ -> X, B⁰bar -> K^*0bar gamma, with K^*0bar -> K^- pi⁺ and K^*0 -> K_s⁰bar pi⁰, where K_s⁰bar -> pi⁺ pi^- (+ charge conjugate mode)
  Status: 10,000 events generated/reconstructed with Aslund. 2/18/99
  
  DECAY.DEC: B0B0bar_Kstgamma.dec
  
  Event dumps: dumpfile.txt
  
  Histograms:check.ps
  
  
Event display: typical event

B -> K*(1273) gamma

B⁰ -> X, B⁰bar -> K^*0bar(1273) gamma (+ charge conjugate mode)
Note: This is NOT quite the mode as requested. The requested channel was B -> K*(1410) gamma, but since K*(1410) is not in the pdt.table, we used K₁⁰ (1273) instead.

B -> rho gamma, B -> omega gamma

• B^+(-) -> rho gamma

  Description:
  B⁺ -> X, B^- -> rho^- gamma (+ charge conjugate mode)
  Status: 10,000 events generated/reconstructed with Aslund. 2/19/99
  
  DECAY.DEC: B+B-_rhogamma.dec
  
  Event dumps: dumpfile.txt
  
  Histograms:check.ps
  
  

• B⁰(bar) -> rho gamma, omega gamma

  Description:
  B⁰ -> X, B⁰bar -> rho⁰ gamma and omega⁰ gamma (+ charge conjugate mode)
  Status: 10,000 events generated/reconstructed with Aslund. 2/19/99
  
  DECAY.DEC: B0B0bar_rhogamma.dec
  
  Event dumps: dumpfile.txt
  
  Histograms:check.ps
  
  
Event display: typical event

B -> D* gamma

B⁰ -> X, B⁰bar -> D^*0 gamma, with D^*0 -> D⁰ gamma, D⁰ -> K^-pi⁺ and D^*0 -> D⁰ pi⁰, D⁰ -> K^-pi⁺ (+ charge conjugate mode)

B -> tau nu

B⁺ -> X, B^- -> tau^- nu_taubar (+charge conjugate mode)