We illustrate some of the other choices as variations compared to our central value: α S (Mz) = 0.1156 → 0.1196 New H1 ‘optimized’ parametrization New.

Slides:



Advertisements
Similar presentations
ZEUS high Q 2 e + p NC measurements and high-x cross sections A.Caldwell Max Planck Institute for Physics On behalf of the ZEUS Collaboration Allen Caldwell.
Advertisements

Low x workshop Helsinki 2007 Joël Feltesse 1 Inclusive F 2 at low x and F L measurement at HERA Joël Feltesse Desy/Hamburg/Saclay On behalf of the H1 and.
Effect of b-tagging Scale Factors on M bb invariant mass distribution Ricardo Gonçalo.
OLD- just experimental NEW- just experimental. OLD- just experimental NEW- just experimental.
H1/ZEUS averaging meeting Sep 22 nd 2008 A M Cooper-Sarkar Studies on heavy quark scheme LHAPDF implementation.
Copyright © 2013 by The S.E.A. Group. A particle filter can be fitted to the front of a gas filter. Copyright © 2013 by The S.E.A. Group Make a combination.
W,Z, pdf’s and the strange quark distribution Max Klein, Uta Klein, Jan Kretzschmar WZ Meeting, CERN QCD Fit assumptions and pdf’s Measurement.
HSG5: work towards Moriond H->bb paper for Moriond: – WH->lνbb and ZH->llbb: – Analysis seems ready. See status here:
Precision Measurement of F 2 with H1 Workshop on DIS and QCD, Florence, Max Klein for the H1 Collaboration Towards today The Measurement Results.
J. Huston Latest results on pdfs and pdf uncertainties J. Huston Michigan State University.
Report on fitting FINAL new data: e- CC (175pb -1 : P=0.30, 71pb -1, P=-0.27, 104pb -1 )(DESY ) e- NC (169pb -1, P=+0.29, P=-0.27)(DESY ) Now.
FC 100% at $11.00 PUT, $.15 FC 10, 15 & 25% at 50 th, 70 th & 90 th %-tile FC 10, 15 & 25% at 50 th, 70 th & 90 th %-tile PLUS an $11.00 $.15.
Investigate model uncertainties OLD/NEW But what about u,d,s,c?
HERAPDF0.2 and predictions for W/Z production at LHC PDF4LHC A M Cooper-Sarkar 29 May 2009 Motivation Some of the debates about the best way of estimating.
May 2005CTEQ Summer School25 4/ Examples of PDF Uncertainty.
H1/ZEUS fitters meeting Jan 15 th 2010 Am Cooper-Sarkar Mostly about fitting the combined F2c data New work on an FFN fit PLUS Comparing HERAPDF to Tevatron.
HERAPDF0.2 and predictions for W/Z production at LHC PDF4LHC A M Cooper-Sarkar 29 May 2009 Motivation Some of the debates about the best way of estimating.
Studies on heavy quark scheme. Comparison of central fit plus total uncertainties to variation of heavy quark scheme: using massive variable flavour number.
Preliminary results in collaboration with Pavel Nadolsky Les Houches /6/5.
1 Combination of PDF uncertainties for LHC observables Pavel Nadolsky (SMU) in collaboration with Jun Gao (Argonne), Joey Huston (MSU) Based on discussions.
Why are PDF’s important for ATLAS Durham, Sep 18 th 2006 A M Cooper-Sarkar, Oxford SM CSC notes UK effort Min bias Glasgow, Sheffield W/Z cross-section.
1 Low-x Meeting July 2008 Held here Don Lincoln Fermi National Accelerator Laboratory for the DØ collaboration Jet Physics at DØ.
Update on fits for 25/3/08 AM Cooper-Sarkar Central fit: choice of parametrization Central fit: choice of error treatment Quality of fit to data PDFs plus.
The New HERAPDF Nov HERA SFgroup AM Cooper-Sarkar Appears compatible with HERAPDF0.1 when doing fits at Q20=4.0 GeV2 But humpy gluon is Chisq favoured.
ZEUS PDF analysis 2004 A.M Cooper-Sarkar, Oxford Low-x 2004 New Analysis of ZEUS data alone using inclusive cross-sections from all of ZEUS data from HERA-I.
Update of ZEUS PDF analysis A.M Cooper-Sarkar, Oxford DIS2004 New Analysis of ZEUS data alone using inclusive cross-sections from all of HERA-I data –
May 14 th 2008 averaging meeting A M Cooper-Sarkar Look at the HERA-I PDFs in new ways Flavour break-up High-x Compare to ZEUS data alone/ H1 data alone.
Predictions for high energy neutrino cross-sections from ZEUS-S Global fit analysis S Chekanov et al, Phys Rev D67, (2002) The ZEUS PDFs are sets.
PDF fitting to ATLAS jet data- a first look A M Cooper-Sarkar, C Doglioni, E Feng, S Glazov, V Radescu, A Sapronov, P Starovoitov, S Whitehead ATLAS jet.
PDF fits with free electroweak parameters Overview of what has happened since March’06 Collaboration meeting Emphasis on the NC couplings au,vu,ad,vd and.
Flavour break-up July7th 2008 Our aim was modest: 1)To alter fc=0.15 to fc=0.09 following investigations of the charm fraction 2)To take into account the.
Precision Cross section measurements at LHC (CMS) Some remarks from the Binn workshop André Holzner IPP ETH Zürich DIS 2004 Štrbské Pleso Štrbské Pleso.
Workshop Activity Comparative politics: How do we compare political systems?
 Introduction  The ZEUS PDF fit: an overview  Impact of future HERA data on the ZEUS fit - end of current HERA-II running scenario - additional studies.
HERA-LHC workshop 21 st -24 th March 2005 Claire Gwenlan (with the help of Sasha Glazov, Max Klein, Gordana Lastovicka-Medin, Tomas Lastovicka)  Introduction.
NLO QCD fits How far can we get without jet data/HERA-II data? A. M. Cooper-Sarkar March-04 Collaboration Meeting ZEUSNOTE Extended ZEUS-S fits.
More on NLOQCD fits ZEUS Collab Meeting March 2003 Eigenvector PDF sets- ZEUS-S 2002 PDFS accessible on HEPDATA High x valence distributions from ZEUS-Only.
High Q 2 Structure Functions and Parton Distributions Ringberg Workshop 2003 : New Trends in HERA physics Benjamin Portheault LAL Orsay On behalf of the.
Write Perimeter, Area or Volume for each answer Number from 1-22 on a sheet of notebook paper.
Further investigations on the fits to new data Jan 12 th 2009 A M Cooper-Sarkar Considering ONLY fits with Q 2 0 =1.9 or 2.0 –mostly comparing RTVFN to.
Treatment of correlated systematic errors PDF4LHC August 2009 A M Cooper-Sarkar Systematic differences combining ZEUS and H1 data  In a QCD fit  In a.
In the context of the HERA-LHC workshop the idea of combining the H1 and ZEUS data arose. Not just putting both data sets into a common PDF fit but actually.
11 QCD analysis with determination of α S (M Z ) based on HERA inclusive and jet data: HERAPDF1.6 A M Cooper-Sarkar Low-x meeting June 3 rd 2011 What inclusive.
June 1st 2008 averaging meeting A M Cooper-Sarkar Model dependence fs Model dependence fc Model dependence need to be consistent when varying Q2_0 Model.
Decision Making Matrix A Closer Look at Preliminary Ideas.
In the QCD sector the PDFs limit our knowledge - transport PDFs to hadron-hadron cross-sections using QCD factorization theorem for short-distance inclusive.
3:00. 2:59 2:58 2:57 2:56 2:55 2:54 2:53 2:52.
Future of DIS: PDF studies at LHC April 18 th DIS 2007 A M Cooper-Sarkar, Oxford At the LHC high precision (SM and BSM) cross section predictions require.
CT14 PDF update J. Huston* PDF4LHC meeting April 13, 2015 *for CTEQ-TEA group: S. Dulat, J. Gao, M. Guzzi, T.-J. Hou, J. Pumplin, C. Schmidt, D. Stump,
H1 and ZEUS Combined PDF Fit DIS08 A M Cooper Sarkar on behalf of ZEUS and H1 HERA Structure Function Working Group NLO DGLAP PDF fit to the combined HERA.
D Parton Distribution Functions, Part 2. D CT10-NNLO Parton Distribution Functions.
Luca Stanco - PadovaLow-x at HERA, Small-x Low-x AND Low Q 2 Luca Stanco – INFN Padova Small-x and Diffraction 2007 Workshop FermiLab, March 28-30,
1 ZEUS Results E. Tassi - Calabria Univ. and INFN DIS 2009 Workshop - Madrid.
Binary Numbers Practice.
N. RaicevicMoriond QCD Structure Functions and Extraction of PDFs at HERA Nataša Raičeviċ University of Montenegro On behalf of the H1 and ZEUS Collaborations.
On detector electronics: High voltage part Tilecal session in ATLAS upgrade week (Tuesday 10 November 2009) François Vazeille  What are the constraints.
Group refractive index ● Method ● Additional runs ● Wavelength distribution ● Systematics ● Results.
HERAPDF1.0 and predictions for W/Z production at LHC PDF4LHC A M Cooper-Sarkar August 2009 Motivation Some of the debates about the best way of estimating.
1 Proton Structure and Hard QCD AM Cooper-Sarkar, Oxford Phys Rev D93(2016)
Hadron Structure from inclusive and exclusive cross-sections in ep scattering On behalf of ZEUS and H1 A M Cooper-Sarkar Oxford HS07 H1 and ZEUS published.
News from HERAPDF A M Cooper-Sarkar PDF4LHC CERN March
Top Fire Protection Services Ottawa available on Dubinskyconstruction
BACK SOLUTION:
HERA I - Preliminary H1 and ZEUS QCD Fit
HESSIAN vs OFFSET method
May 14th 2008 averaging meeting A M Cooper-Sarkar
Solving the Agent’s Problem
Mitja Rosina THE BINDING ENERGY OF THE Ξcc++ BARYON
Variational Inequalities
A M Cooper-Sarkar and K Wichmann
Presentation transcript:

We illustrate some of the other choices as variations compared to our central value: α S (Mz) = → New H1 ‘optimized’ parametrization New ZEUS-JETS ‘optimized parametrization Old ‘in-between’ parametrization with ‘humpy’ gluon solution

Comparison of central fit plus total uncertainties to variations with α s (Mz)= OLD/NEW are the same apart from high-x for the sea. STOP PRESS: the new NEW with fc=0.15 non-dynamic but Q20 and mc variation of fc, looks EXACTLy like OLD Preliminary status requested HERA I PDFs OLDNEW

Comparison of central fit plus total uncertainties to variations with α s (Mz)= OLD/NEW are the same apart from high-x for the sea STOP PRESS: the new NEW with fc=0.15 non-dynamic but Q20 and mc variation of fc, looks EXACTLy like OLD NEWOLD

Comparison of central fit plus total uncertainties to parametrization variation using: New H1 optimised parametrization Old/new are the same Preliminary status requested HERA I PDFs NEWOLD

Comparison of central fit plus total uncertainties to parametrization variation using: New H1 optimised parametrization OLD/NEW very slightly different at high-x Dbar STOP PRESS: the new NEW with fc=0.15 non-dynamic but Q20 and mc variation of fc, looks EXACTLy like OLD NEWOLD

Comparison of central fit plus total uncertainties to parametrization variation using: New ZEUS-JETS optimised parametrization OLD/NEW look the same Preliminary status requested HERA I PDFs NEWOLD

NEWOLD Comparison of central fit plus total uncertainties to parametrization variation using: New ZEUS-JETS optimised parametrization OLD/NEW look the same apart from very high-x Dbar STOP PRESS: the new NEW with fc=0.15 non-dynamic but Q20 and mc variation of fc, looks EXACTLy like OLD

Comparison of central fit plus total uncertainties to parametrization variation using: the ‘humpy’solution for the h1/zeus parametrization. At Q 2 =4 (right)GeV 2 where the humpy structure is more visible OLD/NEW look the same Preliminary status requested NEWOLD

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com Inc. All rights reserved.