10 25 years of D France Hugh Montgomery

10 -25 years of DØ France Hugh Montgomery Jefferson Laboratory LPNHE Universite Paris 6 et 7 October 14, 2008

To our hosts Pascal Debu and everyone at the LPNHE Thank you

The Organisers Greg Bernardi, Marc Besancon, Arnaud Duperrin, Phillipe Gay, Pierre Petroff, Isabelle Ripp-Baudot, Gerard Sajot, Patrick Verdier Thank you

To The Speakers Etienne Auge, Frederique Badaud, Ursula Bassler, John Campbell, Marcela Carena, Dima Denisov, Frederic Deliot, Arnaud Du. Perrin, Albert De. Roeck, Jos Engelen, Paul Grannis, Sebastian Greder, Jean -Francois Grivaz, Beate Heinemann, Matt Herndon, Karl Jakobs, Eric Kajfasz, Patrice Lebrun, Arnaud Lucotte, Bruno Mansoulie, Klaus Moenig, Christophe Royon, Yves Sirois, Jan Stark, Boris Tuchming, Patrice Verdier, Harry Weerts, John Womersley, Darien Wood, Terry Wyatt Especially to the non-DØ people Thank you

Fermilab Antiprotons 5

CDF - The Competition 6

Transition Radiation Detector, ret. TRD inside CDC polypropelene foils X-ray converter and charge collection chamber Xe/CH 4 conversion gap Flash ADC time distribution of TRD response to electrons & pions (CERN test beam). Pion rejection > 50: 1 Charge clusters from converted X rays drifted to anode wires

Transition Radiation Detector The Scarlet Pimpernel, I failed to find a figure until I collected Paul’s Talk yesterday!!! In Pluquet’s Thesis on the web the figures do not survive into. pdf. But: TRD played a major role in the “weeks of top” and for my association with it, the LHCC declared me a TRD expert and had me give an internal briefing as a precursor to the discussion of the Atlas TRT. 8

Tevatron Run I and Top 57 pb Yagil – Top Turns Ten Dec 94 Aug 93 19 pb 9

DØ Author List Abachi to Zylberstejn Thanks to all (Grannis), Hadley – Top Turns Ten 10

Saclay Participation in Top Paper • J. Alitti, • L. Chevalier, • Y. Ducros, • J. F. Glicenstein, • J-F. Lebrat, • B. Mansoulie, • A. Pluquet, • J. Teiger, • A. Zylberstejn 11

Run II Participation: Saclay and IN 2 P 3 “ Apres moi c’est le deluge!!!” a dit Armand (ou Louis XV ou Mme de Pompadour) Bernardi, Bassler, Petroff, Kajfasz, Sajot, … Clermont Ferrand, Grenoble, Lyon, Marseille, Paris, Orsay, CEA-Saclay, Strasbourg 12

Run II: The Calorimeter l The heart of DØ needed help l Electronics l Calibration system l Purity Control l l …. . Lafayette a l’aide des Etats Unis contre les Anglais!? Silicon, and much more 13

DZero 14

QCD: Inclusive Jet Production

Physics of the Bs Meson l Introduction l The Bs Meson l More Bs Mesons l Lifetimes and l Direct CP Violation l Bs Oscillations l CP Violation in Bs J/ l Conclusions

Searches for New Phenomena Searches for new particles predicted by many beyond the SM theories: Leptoquarks – generations 1 and 2 (lljj, lnjj) and combined 1, 2, 3 (nnjj) Susy – squark/gluino in MET+jets, lepton + jets Wino/Zino trileptons, dileptons top squarks bottom squarks GMSB gauginos GMSB photons R-parity violating couplings Right-handed W Heavy W, Z 4 th generation b-quark Excellent Run 1 MET resolution key for many searches. Leptophobic Higgs Large extra dimensions (di-EM, monojets) ! d un Anomalous trilinear couplings Magnetic monopoles Model independent searches (SLEUTH) n o F g N i h t o

New Phenomena l Nothing So Far!!!!! l But SUSY is running out of places to hide l Technicolor has not undergone resurrection l The extra dimensions are really rolled up tightly

Vector Boson Production

Summary of the Top Quark Mass Measurements F. Déliot, D 0 -France 13 -OCT-2008 ( 1. 2 Ge. V) M/M = 0. 7% 21

Electroweak Fits http: //lepewwg. web. cern. ch/LEPEWWG/ 22

Higgs Particle – CDF & DØ Combined

Tevatron Luminosity

Efficient Operations: A DØ Hallmark

LHC: A new era to come? l l We all look forward to the operation of the LHC with collisions at multi-Te. V energies The cross-sections for known high-mass processes such as top production will increase by a factor of ten from the Te. Vatron. The experiments are superbly equipped in this region and higher. The challenge is the low mass; if the Higgs is very light, finding it will be a challenge, anywhere

Conclusions The decision by the Saclay and IN 2 P 3 groups to participate in DØ for run II appears, in retrospect, to have been the precursor to an explosion of participation from Europe in both CDF and DØ at the Tevatron. It was of great importance for DØ ( and German, UK, other European participation in the Tevatron program) It led to great physics. Nous ne regrettons rien