All the new analyses use anywhere from 200 to 440 pb^-1

Internal documentation for these results
References to D0 Notes and draft notes can be found at the link above.

Internal documentation for these results
References to D0 Notes and draft notes can be found at the link above.

Older results (from 2003)

Even Older results (mainly from 2002)

N.B.: References to D0 Notes on this page are for internal use only (unless otherwise authorized) and are passworded for access.

All the new analyses use anywhere from 200 to 440 pb^-1

Check the Physics Coordinator's B Physics Page first for all up-to-date preliminary, submitted, and published results.

• Resonance Production and Properties
• Observation and properties of X(3872) See belowPublished in PRL, see
• Studies of Upsilon(1S) production: absolute cross-section measurement of Upsilon(1S) (Link)
• Study of excited B-mesons: observation of narrow B** states using fully reconstructed B hadrons (Link)
• Observation of semileptonic B decays to narrow D** mesons (Link)
• Reconstruction of B hadron signals at D0 (Link). - Latest note and figures can also be found below
• Observation of the B_c meson and a study of its properties in the J/psi+Muon+neutrino+X final state (Link).
• Reconstruction of Semileptonic Lambda_b decays (Link)
• Reconstruction of B_s -> D_s mu nu (D_s -> K*K-) decays (Link)

• Heavy flavor jet production

• Lifetimes
• Measurement of Lifetime Ratio for B0 and B+ Mesons (preliminary) Submitted to PRL, see
• Measurement of the Lambda_b lifetime using the fully reconstructed final state J/psi Lambda (preliminary) Submitted to PRL, see
• Measurement of the B_s lifetime using the fully reconstructed final state J/psi Phi (preliminary) Submitted to PRL, see )
• Measurement of B_d lifetime using Bd -> J/PsiKs (Link) - uses 114 pb^-1
• Observation of the B_c meson and a study of its properties (including lifetime) in the J/psi+Muon+neutrino+X final state (Link).

 
• Mixing and Oscillations
• Flavour Oscillations in B_d mesons with opposite-side muon tagging (Link)
• Flavour Oscillations in B_d mesons with same-side tagging (Link)
• Measurement of the B_d mixing rate using three flavor tagging algorithms (Link)

 
• Decays & Rare Decays
• Search for the flavor-changing neutral current decay Bs -> mu^+ mu^- (preliminary) Submitted to PRL, see

Evidence for Belle X(3872) State

• Most up-to-date, submitted to PRL: OBSERVATION AND PROPERTIES OF THE X(3872) DECAYING TO J/PSI PI+ PI- IN P-P(BAR) COLLISIONS AT SQRT(S) = 1.96 TEV, By D0 Collaboration (V.M. Abazov for the collaboration). FERMILAB-PUB-04-061-E, May 2004. 6pp.

e-Print Archive: hep-ex/0405004
• Manuscript
• Fig. 1, X mass peak
• Fig. 2, X mass peak, different rapidity ranges
• Fig. 3, fractions in different production and decay variables
• This analysis was performed with approx. 200 pb^-1 of reprocessed data
• Conference Note can be found here
• Individual plots are available at:

    Main Signal (delta_M) Plot, Eta Dependence of Yield, Comparison with psi(2S)
• Additional plots can be found at:

    J/psi mass used in analysis, Plot with same sign pions
• D0 Internal Information can be found at web page

Latest Mass Plots

• None of these plots use extended HTFAA tracking. All use standard p14 tracking
• Conference note describing selection for following mass plots: D0 Note 4481
• Figure 1: mu+mu- mass spectra, approximately 200 pb-1

    Figure 1: Same plot with Standard Model prediction for Bs->mu+mu- overlaid
• Figure 2: J/psi -> mu+mu- mass peak, 250 pb-1
• Figure 3: B+ -> J/psi K+ mass peak, 250 pb-1
• Figure 4: K* -> K+pi- mass peak (in B decay), 250 pb-1
• Figure 5: B_d^0 -> J/psi K*  mass peak, 250 pb-1
• Figure 6: B_d^0 -> J/psi K^0_S mass peak, 250 pb-1
• Figure 7: phi -> K+K- mass peak, (in B decay) 250 pb-1
• Figure 8: B_s -> J/psi phi, 250 pb-1
• Figure 9: Lambda_b -> J/psi Lambda, 250 pb-1
• Figure 10: D^0 mass peak from B -> D^0 mu nu, 250 pb-1
• Figure 11: D* mass diference peak from B -> D^* mu nu, 250 pb-1
• Figure 12: D_s mass peak from B_s -> D_s mu nu, 250 pb-1
• Lambda_b -> J/psi Lambda (~200 pb-1). Cuts are here - This plot has lifetime cuts to clean-up the signal



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Older Results (from 2003)

B jet cross section

• contact: Onne Peters
• Documentation
• mu-jet cross section
• pTrel fit
• b-fraction
• b-jet cross section

A summary of the following results

Plots marked with * are with 114 pb-1

J/Psi mass plot (HTFAAextended tracking)

• Plots marked with * are with 114 pb-1
• * J/Psi mass

B mass plots (HTFAAextended tracking)

• contact: Guennadi Borissov, Sergey Burdin
• * B+ ->J/PsiK+ mass plot
• * B0 -> J/PsiKs mass plot
• * B0 -> J/PsiK* mass plot
• *Bs->J/Psi Phi Bs and phi peak Bs peak only
• Lambda_b -> J/Psi Lambda: Lambda_b peak only Lambda_b peak with background from Lambda sidebands overlaid
• Cuts used for previous mass plots
• B semi-leptonic decays (with 6.2 pb-1 of data)
• Cuts for B-> D+/D*muX
• B->D+muX mass plot
• B->D*muX mass plot
• B0 -> D0muX mass plot, Right/Wrong sign, Cuts used for B->D0muX
• Bs->DsmuX mass plot
• AA Tracking Talk at ADM (28 Feb03)

Average B lifetime and charged B lifetime

• contacts: Pedro Podesta, Eduard De La Cruz Burelo, Brendan Casey
• Average B Lifetime
• * J/Psi mass (with tighter cuts)
• * Average B lifetime plot
• Correction Factor
• Summary Documentation
• B+ Lifetime
• * charged B lifetime plot
• * B mass  with lifetime > 300 microns
• Summary for B+ lifetime

 
• D0 Note 4257: Inclusive B lifetime at D0, E. De La Cruz Burelo, H. Castilla-Valdez, A. Sanchez-Hernandez, B.C.K. Casey, 9/12/03
Abstract:
$D0_PUB/4257.txt (1 kb)
Main file(s):
$D0_PRI/4257/m_BLifetimeNote.ps (801 kb)
• D0 Note Number 4273: Charged B lifetime at Dzero, P. Podesta-Lerma ,H. Castilla-Valdez, A. Sanchez-Hernandez, B.C.K Casey, 10/9/03
Abstract:
$D0_PUB/4273.txt (1 kb)
Main file(s):

$D0_PRI/4273/m_BplusLifetimev1.ps (282 kb)

Bs and Bd lifetime

• contact: Daria Zieminska
• *Summary plots

 
• D0 Note 4221: A study of Bs-J/psi phi and Bd-J/psi K* Decays with the D0 Detector at Fermilab, Chunhui Luo, Daria Zieminska, 8/3/03
Abstract:
$D0_PUB/4221.txt (1 kb)
Main file(s):
$D0_PRI/4221/m_bs_21sets.ps (399 kb)

 
• D0 Note 4220: A study of Bd-J/psi K* Decays with the D0 Detector at Fermilab, Chunhui Luo, Daria Zieminska, 8/3/03
Abstract:
$D0_PUB/4220.txt (1 kb)
Main file(s):
$D0_PRI/4220/m_bd.ps (351 kb)

 
• D0 Note 4219: A study of Bs-J/psi phi Decays with the D0 Detector at Fermilab, Chunhui Luo, Daria Zieminska, 8/3/03
Abstract:
$D0_PUB/4219.txt (1 kb)
Main file(s):
$D0_PRI/4219/m_bs.ps (677 kb)
$D0_PRI/3831/m_qfthep2000.ps (341 kb)

/\_b lifetime

• contact:Abaz and Rick V.
• Uses p14 HTFAA(extended) re-processed data, ~115 pb-1 of data
• Lambda_b -> J/Psi Lambda: Lambda_b peak only Lambda_b peak with background from Lambda sidebands overlaid
• Lifetime analysis in progress

B semi-leptonic

• contact: Brad, Christos, Tulika, Wendy, Vivek
• Analysis was done with approx. 12 pb^-1
• D mass, Lifetime
• Summary document

 
• D0 Note 4244: Inclusive B Lifetime using B->D0 mu X, B. Abbott, T. Bose, V. Jain, C. Leonidopoulos, W. Taylor, 9/2/03
Abstract:
$D0_PUB/4244.txt (1 kb)
Main file(s):
$D0_PRI/4244/m_d0note_4244_v103.ps (317 kb)

B flavor tagging using muons

• contact: Christos Leonidopoulos
• * Latest results
• * B+ plot used for tagging studies

B flavor tagging using average jet charge

• contact: Xiaojian Zhang
• Cuts used to select the B+ peak are the same as for tagging using Muons
• * tagging results
• *1-page plot

Same-Side Tagging

• contact: Avdhesh Chandra, Jim Fast
• Draft Note
• B Mass plot  epsgif
• One page description of algorithm
• Results table

Bs -> mu+mu-

• contact: Pete Tamburello, Elliott Cheu
• * Mass plot
• * Summary document
• * Plot of Variables

Upsilon cross section (and polarization)

• contact: Andrzej Zieminski, Jundong Huang

D0 Note 4264, Studies of Upsilon(1S) bottomonium state production with the D0 detector at Fermilab, Daniela Bauer, Jundong Huang, Andrzej Zieminski
Abstract:
$D0_PUB/4264.txt (1 kb)
Main file(s):
$D0_PRI/4264/m_ups_note.ps (1096 kb)
$D0_PRI/4264/m_ups_note_v3.ps (831 kb)
Plot of normalized differential cross section, comparing shape of different rapidity ranges (ps) (pdf)
Plot of normalized differential cross section over rapidity range |y|<1.8 compared to CDF Run 1 result over range |y|<0.4 (ps) (pdf)

B**

• contact: Matt Doidge
• * Summary documentation
• * Mass plot

Chi_c mass plots

• contact: Alexandre Khanov
• * Final Plot

Other mass peaks:

• Kshort and Lambda mass peaks plot
• Xi->Lambda-pion and Omega->Lambda-K plot