r.carlin 2006 aspen winter conference hera for lhc roberto carlin university of padova and infn-pd

RCarlin 2006 Aspen Winter Conference

HERA for LHC

Roberto CarlinUniversity of

Padova and INFN-PD


LHC pp collider radics = 14 TeV

Discovery machine Higgs Susy

But it is a parton-parton colliderneed the structure of the proton and QCD to get precise results understand the backgrounds to new physics measure the luminosity

Need to control QCD effects at the best


HERA ep collider radics = 320 GeV

Mostly a QCD machine

Parton densities jets hard diffraction heavy flavors productionhellipThe photon can be used as an hadronic probe (ldquoresolvedrdquo photon in photoproduction) multiple intraction gap survival in diffractionhellip

HERA is the ideal machine to make precision QCD studies and test new QCD predictions


Topics for this talkbull What is the impact of

the measurements done so far (HERA-I)

bull Can we do better in HERA-II for what concernes LHC

bull What should be measured really to have an impact

bull Structure functions and parton distribution functions

bull Diffraction diffractive PDFs and generalised parton distributions

bull Multiple interactionsbull Heavy flavor

production

Very detailed documentation in the proceedings of the HERA-LHC workshop recently issued as CERN-2005-014 yellow reportApologies to the original authors for the plots without the proper reference


Parton distributions HERA results

PDFs fits without and with HERA data at different Q2 uncertainty vastly reduced particularly at low-x NB same fit sameparametrization and DGLAP evolution just no HERA data


Example the effect of HERA PDFs in the determination of the W+ production at LHC

Process is important for the measurement of the luminosity in LHC

00001ltxlt01

bull Uncertainty from a specific PDF fit goes from ~16 to ~35 using HERA data

bull Low- to midle-x gluon knowledge is essential

bull Is our knowledge of PDFsit good enough

W+ rapidity

W+ rapidity


Results of H1 and ZEUS are compatible

But there are clear differences particularly at low-x in the gluon The differences are mostly from the dat sets not from the fits and prameterizations

NB the gluon is not directly measured in HERA enters in the PDFs from F2lnQ2

use exclusive measurements senitive to the gluons (jets charmhellip)

Example of differences between PDFs


bullSpread of existing PDFs gives 10 uncertainty on Higgs cross sections at LHC

bullSame in the W production (8)bullNeed to do better than this

Djouadi amp Ferrag


Not only experimental data but also QCD calculations need progress (NNLOhellip) for the PDF fits

Large evolution from HERA to LHC to high-Q2 and low-x

bull Is NLO (NNLO) DGLAP good enough

bull Collinear factorization kt effects

bull BFKL ln(1x) resummationbull Saturation non linear

evolution

Precise data from HERA should help models to disentangle these effects


HERA-2 is expecting an integrated luminosity ~700pb-1 (H1 and ZEUS have ~130pb-1 on tape from HERA-1) Various improvements are possible

bull Use Jet data in the fits with higher statistics

bull Increased statistics on high Q2 data

bull Measure FL

Improvements are also possible with present data

bull Improved systematicsbull Combined data fits

How can we improve with HERA-2 the uncertainty in the PDFs


Improves the mid- to high-x gluon distributions up to high scalesAllowes to fit without the low energy heavy target data (target corrections systematics)

The use of high statitics HERA-2 data brings a significative improvement

gluon fractional errorInclusion of DIS Jet and High-Et dijet photoproduction data in the PDFs fits

Even better using full statistics AND optimised jet cross sectionsmeasurements designed to optimise the sensitivity to the gluon density

C Gwenlan A Cooper-Sarkar CTargett-Adams


At high-Q2 high-x the NCCC measurement is still limited by statistics

Expect impact in the valence quarks distributions

The measurements at low-Q2 are already limited by the systematic uncertainties O(2-3)

bullH1 is planning to reduce the systematics at low-Q2 using HERA-I yr 2000 databullGoal is to reach 1 level will effect mostly low-x gluon


Simulation 500 pb-1 in the e+ and e- channels

Improvement up to a factor 2 in the valence

NB this is a ZEUS fit with jets cross sections and no low energy data results still improves wrt global fits

There are also improvements in xF3~Σ(q-qbar) up to a factor of three


Impact on LHC from improved PDFs (I)


Impact on LHC from improved PDFs (II)

Uncertainty on jet cross section at LHC significantly reduced


Measurement of FL

Can be performed with a set of lowered p energies at HERA-2 (~10pb-1)

bull σr~F2(xQ2)-f(y)FL(xQ2) y=Q2sxbull measure cross sections at high-y and change y at fixed xQ2

(change s)

FL~sxg(xQ2)

direct measurement of the gluon

M Klein


Result of a simulation (MKlein)

bull Can get ΔFL ~ 10-20bull The measurement of FL can

have an impact mostly in the low-x gluon low-Q

bull Important test of QCD consistency

bull HERA is the only place to mesure it

bull Trade off with luminosity lost at high energy

bull Luminosity goes as Ep2

bull Setup the machinebull Problem are the present

detectors well tuned to the measurement (low-x low-Q2)


Overall improvement from HERA-II statistics


Combining H1 and ZEUS present data

Using H1 and ZEUS data together in standard QCD fits The improvement is marginal errors are dominated by systematics the data sets are not incompatible but pull against each otherhellip


Example on how the combined ldquoHERArdquo data set after the fit is betterthan each individual pointBeware still preliminary all pitfalls have to be worked out

Different method (Glazov) Global (Hessian) fit of H1 and ZEUS cross section data The idea is that we are measuring the same thing and the systematics of one experiment can be solved by the other taking into account correlations Indeed systematics are quite different between ZEUS and H1

It is a duty of the HERA community to provide the best PDFs


Diffractive Higgs production at LHC

2-10 fb

bullClean signal very good mass resolution for the exclusive process

bullNeed knowledge of the diffractive PDFs and GPD

O(100) fb

fi(zXIPtQ2)


HERA is measuring DVCS and eleastic VM production (ρφJΨ Υ)

which are in principle sensitive to GPDsbullVM data sensitive to gluon distribution at x~(MV

2+Q2)W2

(neglecting skeweness of the two gluons)


Example exclusive JΨ production in DISbullSmallest theoretical error in DVCS and ΥbullRates are low need HERA-2


Diffraction at HERA

bull ~10 of DIS NC events are diffractive (rapidity gap)

bull Hard process should be described by QCD (2g exchange)

bull QCD factorization a hard process and a structure function F2

D(4)(xIPtβQ2)

bull Measure the diffractive PDFsbullBackground to the exclusive diffraction at LH

bull Understand the gap survival probability

X


First compilation of HERA F2

D(3)

Different methodsbull tagged proton LPS FPS

(clean but low statistics)bull rapidity gap (H1)bull Mx method (Zeus) based on

the distribution of lnMX2

Result

bull Reasonable agreement between H1 and ZEUS

bull There are regions of significant discrepancies


NLO QCD fit

Gluon dominates over the singlet

Almost a factor 2 difference in the gluon between Zeus and H1

More work needed More data will come from FPS (H1) and exclusive processes


QCD fit to inclusive diffractive data can predict the exclusive diffractive dijets production in DIS Same for diffractive DIS charm production Some confidence in the process

Diffractive PDFs are they process independent functions (hard scattering factorization)


HERA diffractive PDFs fail to describe diffractive hadron-hadron collisions at the Tevatron To be understood and quantified to export results to LHC

Factorization is broken by the interctions of the spectator quarks (multiple interactions) Soft interactions between the spectator fill the gap (gap survival probability reduced)


At HERA we can have hadron-hadron interactions ldquoresolvedrdquo photon in photoproduction where the photon hadronizes before the hard scattering So we should see that the rapidity gap fills in these interactionsNB at HERA we can switch ON and OFF the hadron-hadron studying direct vs resolved


For jets in photoproduction the NLO fit overestimates the data by a factor 2 in both ldquoresolvedrdquo and ldquodirectrdquo photon regimes contrary to what expected from ldquogap survivalrdquo models (suppression in resolved only) More work is needed Use ratio beween diffractive and inclusive Jets


Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton

Underlying Event Underlying Event

Outgoing Parton

Outgoing Parton

Multiple Interactions

MI (additional partonic remnant-remnant interactions) will certainly be an issue at LHC

Has HERA anything to say about that


4 jets event in photoproduction at HERA

bull High order photoproduction process

bull At low xγ (ldquoresolvedrdquo) it can be interpreted as hadron-hadron collisions

bull The inclusive sample is well described by standard PS models + MI (with hard scattering contribution to the underlying event)

bull Not conclusive but suggestive


Multiple Interaction Diffraction saturation relationship AGK cutting rule in QCD

Diffraction

MI

Saturation

Bartels Kowalski Sabio-Vera


Try to find observables sensitive to non-DGLAP evolution

Measure forward jets in DIS at HERA

Study non-DGLAP QCD evolution at low-x

bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2

bull kT ordering (DGLAP DISENT) bull x ordering (BFKL)bull angular ordering (CCFM)


Standard pQCD gives poor description at low-x for forward jets but hadronization and scale uncertainties are large

bullNeed more statistics and phenomenological progress to improve the understanding

x


Open Heavy Quark Production at HERAimpact on LHC

bull At very high-Q2 heavy quarks distributions are of size comprable to light sea quarksndash Impact on lumi

processes (Z production)

bull The b quarks PDFs enter in a number of interesting process at LHC (as signal or background)ndash Higgs productionndash Searches


bull5 difference in the pp z production if b PDFs are neglectedbullNeed to know F2

b to 20 accuracy to get Z production at 1 level


bull Presently the b production cross section at HERA is relatively well described by NLO QCD some discrepancy in selected regions

bull No more a factor 2-3 of overall excess bull Still limited statistics from HERA-I (b into μ channel)

open b productiondijet in photoproduction

open b productionjet in DIS


bull H1 has shown the first F2b

measurements using the lifetime still limited in statistics (57pb-1)

bull In HERA-II ZEUS has a new microvertex (MVD)

bull The increased statistics and the use of vertex detectors will improve significantly (order of magnitude) the heavy flavours measurements at HERA-II


Conclusions

bull The HERA experiments have performed many measurements essential for LHC

bull Many more have to come with HERA-IIbull Many things I did not mention

ndash Lot of theoreticalphenomenological developments in QCD triggered by HERA

ndash MC tools developments ndash Design of very forward region (leading proton

tagging)bull HERA will stop in July 2007 still lot of data

to come we are getting ready for a prompt analisys

HERA for LHC

Slide 2

Slide 3

Topics for this talk


Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35

Open Heavy Quark Production at HERA impact on LHC

Slide 37

Slide 38

Slide 39

Conclusions


LHC pp collider radics = 14 TeV

Discovery machine Higgs Susy

But it is a parton-parton colliderneed the structure of the proton and QCD to get precise results understand the backgrounds to new physics measure the luminosity

Need to control QCD effects at the best














production








00001ltxlt01




W+ rapidity

W+ rapidity










Djouadi amp Ferrag







evolution






bull Measure FL


























Measurement of FL



(change s)

FL~sxg(xQ2)


M Klein






















2-10 fb



O(100) fb

fi(zXIPtQ2)




2+Q2)W2





Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions














production








00001ltxlt01




W+ rapidity

W+ rapidity










Djouadi amp Ferrag







evolution






bull Measure FL


























Measurement of FL



(change s)

FL~sxg(xQ2)


M Klein






















2-10 fb



O(100) fb

fi(zXIPtQ2)




2+Q2)W2





Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions







00001ltxlt01




W+ rapidity

W+ rapidity










Djouadi amp Ferrag







evolution






bull Measure FL


























Measurement of FL



(change s)

FL~sxg(xQ2)


M Klein






















2-10 fb



O(100) fb

fi(zXIPtQ2)




2+Q2)W2





Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions










Djouadi amp Ferrag







evolution






bull Measure FL


























Measurement of FL



(change s)

FL~sxg(xQ2)


M Klein






















2-10 fb



O(100) fb

fi(zXIPtQ2)




2+Q2)W2





Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions







evolution






bull Measure FL


























Measurement of FL



(change s)

FL~sxg(xQ2)


M Klein






















2-10 fb



O(100) fb

fi(zXIPtQ2)




2+Q2)W2





Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions





bull Measure FL


























Measurement of FL



(change s)

FL~sxg(xQ2)


M Klein






















2-10 fb



O(100) fb

fi(zXIPtQ2)




2+Q2)W2





Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions























Measurement of FL



(change s)

FL~sxg(xQ2)


M Klein






















2-10 fb



O(100) fb

fi(zXIPtQ2)




2+Q2)W2





Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions






















2-10 fb



O(100) fb

fi(zXIPtQ2)




2+Q2)W2





Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions




2+Q2)W2





Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions




Diffraction at HERA




D(4)(xIPtβQ2)



X



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions



D(3)




Result




NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions


NLO QCD fit















Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions












Proton AntiProton

PT(hard)

Outgoing Parton

Outgoing Parton


Outgoing Parton

Outgoing Parton












Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions









Diffraction

MI

Saturation






bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions





bull low xbj

bull xjetgtgtxbj

bull E2Tjet~Q2





x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions




x




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions




















Conclusions







HERA for LHC

Slide 2

Slide 3



Slide 6


Slide 8

Slide 9


Slide 11

Slide 12

Slide 13



Measurement of FL

Slide 17



Slide 20


Slide 22

Slide 23

Diffraction at HERA

Slide 25

NLO QCD fit

Slide 27

Slide 28

Slide 29

Slide 30


Slide 32

Slide 33

Slide 34

Slide 35


Slide 37

Slide 38

Slide 39

Conclusions

r.carlin 2006 aspen winter conference hera for lhc roberto carlin university of padova and infn-pd

Documents

aspen winter conference

aspen winter conference

hera data slide

aspen winter conference

diffraction hera

heralhc workshop

hera results pdfs

effect of hera pdfs