Giorgio and CDF

Celebrating 70 years of Giorgio and >25 years of CDF

Henry Frisch Univ. of Chicago

A Personal Note:I first met Giorgio at the 1974 London Conf- we had just found ‘direct muons’ (charm):

He came to the session in tennis whites + rackets, with charm and enthusiasm.

“The lack of Pt ‘bumps’ means that there are no significant heavy objects (M from 3 to 10 GeV) that decay into 2 leptons”-Leon

Intro: Giorgio’s Physics Interests:

See Fermi’s Yale Lectures of 1951“Electromagnetic and

Yukawa InteractionConstants:”

“Perhaps future developments..will enable us to understand the reasons for the existence and the strength of the various interactions.”- Fermi

The Start of CDF• Jan 1997- Cronin heads Colliding Beam

Dept.- -• 2 Init. Designs: one magnetic, one not• Wilson decrees 10M$ cap on detector cost (!)• Oct. 78- Wilson resigns- Lederman new Dir.• Oct. 79- CDF Dept formed; Alvin Head of CDF• Giorgio had already approached Alvin – Pisa

is one of the founding institutions at formal start.

Fig. from TDR 1981

N.B.

CDF Technical Design Report

Author List 1981

G. Bellettini, M.Bertani, L. Bosisio, C.Bradaschia, R.DelFabbro,E.Focardi, M.A. Giorgi, A.Menzione, L.Ristori, A.Scribano, G.Tonelli

S. Bertolucci,M.Cordelli, P. Giormini, P.Sermoneta

HJF and HJ, eds.

Big Step- Technical Design Report

Draft of Fig. 1 of TDR

Remarkable in that it’s what we built!

1981 Vision of top, b-physics!

From Silicon Section of TDR- Aldo, Giorgio,…

Remarkable Paragraph (amazingly forsighted).

The SVX- key to the top discovery and all CDF b-

physics

Critical Dev! Aldo,Giorgio, et al.

1981 TDR AS BUILT-92

Central Hadron Calorimeters

1981 TDR AS BUILT

The detector comes to life…82-85

Some of the crew at work: B0

More B0

Giorgio’s Physics on CDF:

Long Interest in High-Pt pheno-mena (<1974)

Top Discovery (94/5)

Top Properties

Strong Drive for New Effects-

1975 Yerevan Lectures

The Top “Evidence” and Discovery

Giorgio at the announcement

March 2, 1995; Giorgio Co-spokesperson

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1987 Integrated Luminosity (nb)

Run 2 Lum (pb)

Evolution of the Tevatron Collider

CDF in the Present

Collisions at s-hat>1TeV2

CDF Run2 Inclusive Jet Spectrum

(Evelyn Thompson’s ICHEP talk)

Run 2 Top Measurements--

Mtop = 179.6 (stat) ± 6.8 (sys)

GeV/c2

+6.4-6.3

Run 2 Top Mass- l+jets

Giorgio’s Other LongLasting Contributions:

Broad Italian Component

Many Generations of Excellent Young Students (preLHC-school)

Support for non-US physicists (Russians,others,…)

CDF presence at Conferences- La Thuile, PbarP, Elba,...

General Level of Culture- (next slide)

Tita demonstrates typical Fermilab cuisine pre-Giorgio

Thank you Giorgio- from all of CDF

The End

• 33 tt candidate events– Fitted background fraction

CDF Run II – Multivariate Results

Fb = 0.34 ± 0.14

Mtop = 179.6 (stat) ± 6.8 (sys) GeV/c2

+6.4-6.3

This method will be more powerful with the future larger data sample

First baby Bison born at Fermilab

The VTX/SVX