Discussion on the 1st MPI@LHC agenda

The w/s is organized in 8+1 “four hours” sessions (including1/2 hour breaks) the last one being dedicated to the highlights

- 42 confirmed talks:

Section zero “Hot Topics” : 4 (30+10’ talks)Section one “Soft+Hard MPI” : 8+9 (20+5’ talks)Section two “Small x & Diffr.” : 8 (20+5’ talks)Section three “MC” : 6 (30+10’ talks)Section four “HI” : 7 (30+10’ talks)

- 14 pending talks (most likely to be dropped)

(1) Welcome 1 - Perugia City Authorities (10’)(2) Welcome 2 - University of Perugia Authorities (10’)(3) Introduction to the Workshop, Communications etc. - w/s Organizers (10’)

(4) Higgs Search at Tevatron - Ralf Bernhard (D0)(5) Early measurements at the LHC - Oleg Fedin (ATLAS) (6) Monte Carlo Generators for the LHC - Roberto Chierici (CMS)(7) Large Rapidity Gap method for Higgs hunting at the LHC - Valery Khoze(8) Total cross sections at the LHC - Rohini Godbole30+10’, 30’ intro+break

Monday morning Session - 9.00 - 13.00Section 0 - Introduction & Hot topics (P.Bartalini, Y.Srivastava)

Proposals to accommodate the need of the speakers and to balance the agenda (We kindly ask the conveners of the sections to be flexible on these possible re-arrangements)- Further talks may be moved here- 20+5’ duration is also an option

Monday evening Session - 14.30 - 18.30Section 1a - Soft & Hard MPI (A.Moraes, R.Field, M.Strikman)

(1) Transverse structure of nucleon, color fluctuations in nucleon - C.Weiss(2) Progress in jet search algorithms - Matteo Cacciari(3) MC event generators - look from hard core QCD theorists - Yuri Dokshitzer

- didn’t answer yet(4) how to implement coherence effects - John Collins

- cannot come(5) Multijet production and S-channel unitarity - Ted Rogers(6) Heavy quarks, J/psi as tools to probe multiparton interaction dynamics - J.W.Qiu(7) W's as tools to probe multiparton interaction dynamics - Daniele Treleani(8) Color connections, Multijets - P. Skands (See last talk in Section 3a)20+5’ talks, 30’ intro+break

Proposals to accommodate the need of the speakers and to balance the agenda (We kindly ask the conveners of the sections to be flexible on these possible re-arrangements)- Move the talk of M. Cacciari in Section 0- Move the talk of P.Skands in Section 3a- Move here the Tevatron talks from Section 1b

TH

Tuesday morning Session - 9.00 - 13.00Section 1b - Soft & Hard MPI (A.Moraes, R.Field, M.Strikman)(1) CDF: Min-Bias Studies at CDF and Comparisons with MC - Niccolo' Moggi(2) CDF: The Underlying Event and Comparisons with MC - Rick Field(3) CDF: Double Hard MPI and Comparisons with MC

- didn’t answer yet(4) D0: Min-Bias and the Underlying Event at D0 and Comparisons with MC

- no available speaker (offered talk in “Hot Topics” Section, instead (5) ATLAS: Status of the minimum bias events - William Bell(6) ATLAS: Underlying Event Studies - Alessandro Tricoli(7) ATLAS: Tuning of the QCD Monte Carlo Models - Arthur Moraes(8) CMS: Min-Bias studies - Ferenc Sikler(9) CMS: Underlying Event studies - Filippo Ambroglini(10) CMS: Study of Double Hard MPI in 3jet+gamma - Florian Bechtel(11) ALICE: Min-bias Studies at ALICE - Raffaele Grosso(12) TOTEM: Min Bias - Fabrizio Ferro

- turned into “TOTEM Early Measuremnets”(13) LHCb: Minimum Bias at LHCb Umberto Marconi (14) HERA: MPI in photoproduction - Lluis Marti (H1)20+5’ talks, 30’ intro+break

Proposals to balance the agenda:- Possible migration of the TOTEM talk to the section zero- Move Tevatron talks in Section 1a (30’ might be an option for these talks)- Extension to the afternoon (Section 1c)

EXP

Tuesday evening Session - 14.30 - 18.30Section 2a - Small x physics and diff. (L.Frankfurt, H.Jung)

Relation of MPI and hard diffractive processes as well as small x processes

(1) Vectormeson and dijet production - Henri Kowalski (2) Small x pdfs - experimental review - Ronan McNulty (LHCb)(3) Small x pdfs - theoretical issues - Marcello Ciafaloni

- no answer• Small x pdfs - diffractive/not diffractive integrated/unintegrated - Victor Lendermann (H1)

• Gap survival probability and rescattering in diffraction - Ada Solano (ZEUS)• Gap survival probability and rescattering in diffraction (Tevatron speaker)

- no answer(1) Gap survival probability and rescattering in diffraction (LHC) - Michele Arneodo

(CMS)(2) Theoretical estimates of gap survival - Ch. Weis(3) Soft and hard diffraction and relation to MPI (theo)20+5’ talks, 30’ intro+break

Proposals to balance the agenda:- Dedicate half of this Session to the possible extension of Section 1b- Move two-three talks to Section 2b (which ones ?)

The scale Q0 separating soft and hard processes +Simulation and modelling of diffraction/saturation/MPI

(1) Extracting Q0 from measurements (HERA)- negotiated different talks (already converged on them)

(2) Extracting Q0 from measurements (Tevatron)- no answer

(3) Forward jet close to rapidity gaps & Muller Navelet jets at the LHC- Mario Campanelli (ATLAS)

(4) The energy dependence of Q0 (Theo) - Leszek Motyka- no answer

• New phenomena in DIS at very high energies and it's impact on LHC - Boris Bloc• Monte Carlo implementation of MPI/diff/sat. - E. Avsar/G. Gustaffson

- cannot come20+5’ talks, 30’ intro+break

Wednesday morning - 9.00 - 13.00Section 2b - Small x physics and diff. (L.Frankfurt, H.Jung)

Proposals to balance the agenda:-Move here two-three talks from Section 2a (which ones ?)

Wednesday morning Session - 9.00 - 13.00Section 3a - Monte Carlo Models (T.Sjostrand, J.Butterworth)

Main LHC generators

(1) Herwig++ - Manuel Bähr(2) Pythia 8 - Richard Corke(3) Sherpa - Stefan Höche(4) Color connections, Multijets - Peter Skands30+10’ talks, 30’ intro+break

Wednesday afternoon: free

Proposals to accommodate the need of the speakers and to balance the agenda Talk of P.Skands from Section 1a moved here

Thursday morning Session - 9.00 - 13.00

Cosmic ray generators / Tuning(1) PhoJet and others - Ralph Engel (See first talk in Section 4a)(2) EPOS and others - Klaus Werner(3) Comparison between tuned generators - Hendrik Hoeth30+10’ talks, 10’ intro

11.00 - 13.00Section 4a - Heavy Ions (D.D'Enterria, D.Treleani)

(1) MCs based on the Regge-Gribov approach - Ralph Engel (can be moved to Section 3b)

(2) High parton densities and saturation scale - Cyrille Marquet(3) Unitarization of the BFKL Pomeron within pQCD - E. Iancu

- cannot come(4) Antishadowing and multiparton scattering in had-nucl collisions - M. Strikman30+10’ talks, 10’ intro

9.00 - 10.30Section 3b - Monte Carlo Models (T.Sjostrand, J.Butterworth)

Thursday evening Session- 14.30 - 18.30Section 4b - Heavy Ions (D.D'Enterria, D.Treleani)

(1) Quarkonia production (production through MPI followed by final state heavy-quark recombination) - Andrei Mischke

(2) Jets in heavy-ion collisions (emphasis on UE bg subtraction) - Mark Heinz(3) Incoherent parton-parton scattering, nuclear PDFs, and hard pQCD yields in

nucleus-nucleus collisions - Klaus Reygers(4) Signals of parton collectivity at RHIC - Raymond Snellings -

- no answer(5) Heavy-ion perspectives at the LHC - Dave Hofman30+10’ talks, 10’ intro

Friday morning Session - 9.00 - 13.00

Highlights / Report from conveners and round table

Electronic Conference Proceedings Archivehttp://www.slac.stanford.edu/econf/

Proceedings

All speakers would be kindly invited to send their written contribution (5-10 pages) until Jan 31st 2009 to mpi08@pg.infn.it We would like to have the proceedings published in Winter 2009