Update on CTEQ-TEA PDFs Carl Schmidt Michigan State University On - - PowerPoint PPT Presentation

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Update on CTEQ-TEA PDFs Carl Schmidt Michigan State University On - - PowerPoint PPT Presentation

May 29, 2023 449 likes •767 views

Update on CTEQ-TEA PDFs Carl Schmidt Michigan State University On behalf of the CTEQ-TEA group July 31, 2107 DPF 2017 Fermilab, Batavia, IL, USA CTEQ-TEA group CTEQ Tung et al. (TEA) in memory of Prof. Wu-Ki Tung, who established

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SLIDE 1

Update on CTEQ-TEA PDFs

Carl Schmidt

Michigan State University

On behalf of the CTEQ-TEA group

DPF 2017 Fermilab, Batavia, IL, USA July 31, 2107

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SLIDE 2

CTEQ-TEA group

  • CTEQ – Tung et al. (TEA)

in memory of Prof. Wu-Ki Tung, who established CTEQ Collaboration in early 90’s

  • Current members of CTEQ-TEA group:

Sayipjamal Dulat (Xinjiang U.), Tie-Jiun Hou, Pavel Nadolsky, Bo-Ting Wang, Keping Xie (Southern Methodist U.), Jun Gao (Shanghai Jiaotong U), Marco Guzzi (U. of Manchester & Kennesaw State), Joey Huston, Jon Pumplin, Dan Stump, CS, Jan Winter, C.-P.Yuan (Michigan State U.)

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SLIDE 3

CT14 Parton Distributions

  • 2015 major release of general purpose

PDFs CT14NNLO/NLO, including αs series and nf=3,4,5 [1506.07443]

  • Combined HERA charm, H1 FL data in NC DIS
  • Early LHC Run 1 data on W/Z charged lepton

rapidity and asymmetry

  • Inclusive jet production from ATLAS & CMS
  • More flexible parametrization: gluon, d/u at large-

x, d/u & dbar/ubar at small-x, 28 eigenvectors compared to 25 for CT10

  • http://hep.pa.msu.edu/cteq/public/index.html

u d g s

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SLIDE 4

Beyond standard CT14

  • CT14QEDinc: constraints on photon PDFs in the nucleon [1509.02905]
  • CT14MC: MC replicas for certain applications [1607.06066]
  • CT14HERA2: effects of combined HERA1+2 data [1609.07968]
  • CT14IC: intrinsic/fitted charm component [1707.00657]
  • CT17: preliminary fits (CT17p)
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SLIDE 5

Outline

  • CT14IC (intrinsic charm)
  • CT17 preliminary fits and impact of new data
  • LHC ttbar distributions (ATLAS 8 TeV)
  • Conclusion
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SLIDE 6

Fitted Charm and CT14IC

  • Charm PDF in CT14 is generated perturbatively from c(x,Q0=mc)=0

(nonzero matching at NNLO)

  • However, nonzero c(x,Q0=mc) is possible at % level of total mom. fraction
  • “fitted charm” = “nonperturbative charm”

+ other higher order terms in αs or Λ2/mc

2

  • Dominant higher twist terms evolve in Q just as twist-2 terms
  • Perturbative charm cancels at Q ~ mc up to higher order in αs
  • Assume factorization holds.
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SLIDE 7

Parametrizations of c(x,Q0)

  • 1. “Valence-like” intrinsic charm: BHPS1 and BHPS2 (Brodsky et al PLB 1980)
  • 2. “BHPS3 model”: compute numerical solutions to BHPS model with physical

masses, and include uubar, ddbar, ccbar intrinsic components => gives physical behavior of c/ubar, c/dbar at large x

  • 3. “Sea-like” models SEA1, SEA2

c(x) = ¯ c(x) = 1 2Ax2 1 3(1 − x) (1 + 10x + x2) − 2x(1 + x) ln (1/x)

  • c(x) = ¯

c(x) = A ⇥ ¯ d(x, Q0) + ¯ u(x, Q0) ⇤

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SLIDE 8

Models of IC in the proton

0.005 0.01 0.015 0.02 0.001 0.01 0.1 1 xc(x,Q) x IC models in the CT14IC fit, Q = 1.3 GeV, Nf = 4 1000*CT14-pert. BHPS1 BHPS2 BHPS3 SEA1 SEA2 0.005 0.01 0.015 0.02 0.001 0.01 0.1 1 xc(x,Q) x IC models in the CT14IC fit, Q = 2 GeV, Nf = 4 CT14-pert. BHPS1 BHPS2 BHPS3 SEA1 SEA2

  • Valence-like models: BHPS1, BHPS2, BHPS3
  • Sea-like models: SEA1, SEA2
  • Perturbative: No IC contribution

There is a sizable perturbative contribution, just from evolving from 1.3 to 2.0 GeV.

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SLIDE 9

<x>IC for various models

  • Defining: at Q0=1.3 GeV
  • 90% CL limits for CT14 and CT14HERA2 fits, using charm pole mass mc=1.3 GeV:

∆χ2 <x>IC BHPS1 BHPS2 SEA1 SEA2 CT14 Q0=1.3GeV BHPS BHPS + Tier-2 SEA SEA + Tier-2

  • 40
  • 20

20 40 60 80 100 120 0.01 0.02 0.03 ∆χ2 <x>IC BHPS3 CT14HERA2 Q0=1.3GeV BHPS BHPS + Tier-2 SEA SEA + Tier-2

  • 40
  • 20

20 40 60 80 100 120 0.01 0.02 0.03

x IC = x c(x,Qc)+ c(x,Qc)

[ ]

1

∫

dx

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SLIDE 10

Dependence on charm mass

  • CT14NNLO (no IC) fits prefer light MSbar charm mass mc(mc) ~ 1.2-1.3 GeV
  • Exact value depends slightly on gluon parametrization.
  • BHPS models are roughly independent of mc.
  • SEA models with larger mc allow associated larger <x>IC .

∆χ2 <x>IC CT14, BHPS Q0=1.0 GeV mc=1.5 GeV mc=1.4 GeV mc=1.3 GeV mc=1.2 GeV mc=1.1 GeV

  • 40
  • 20

20 40 60 80 100 120 0.01 0.02 0.03 ∆χ2 <x>IC CT14, SEA Q0=1.0 GeV mc=1.5 GeV mc=1.4 GeV mc=1.3 GeV mc=1.2 GeV mc=1.1 GeV

  • 40
  • 20

20 40 60 80 100 120 0.01 0.02 0.03

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SLIDE 11

Impact of IC on PDFs

PDF Ratio to CT14NNLO x c(x,Q) at Q =2.0 GeV 90% C.L. CT14NNLO BHPS1 BHPS2 BHPS3 SEA1 SEA2 0.0 1.0 2.0 3.0 4.0 5.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14NNLO x c(x,Q) at Q =100.0 GeV 90% C.L. CT14NNLO BHPS1 BHPS2 BHPS3 SEA1 SEA2 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9

  • At low Q:
  • SEA models uniformly above CT14
  • BHPS models dominant at high x
  • At high Q, perturbative contribution dominates at low x
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SLIDE 12

Impact of IC on gg luminosity

  • Sea models: gg luminosity suppressed at low MX, enhanced at high MX
  • BHPS models: suppressed at high MX
  • Impact on Higgs cross section small.
  • Sizable impact for high mass gg luminosities, but still within uncertainties.

Ratio to CT14NNLO M

X

[GeV] Lgg at Ecm=8.0 TeV, 68% C.L. CT14NNLO BHPS1 BHPS2 BHPS3 SEA1 SEA2 0.8 0.9 1.0 1.1 1.2 101 102 103 Ratio to CT14NNLO M

X

[GeV] Lgg at Ecm=13.0 TeV, 68% C.L. CT14NNLO BHPS1 BHPS2 BHPS3 SEA1 SEA2 0.8 0.9 1.0 1.1 1.2 101 102 103

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SLIDE 13

Impact on LHC observables

  • Impact on inclusive Higgs, Z, W+, W- cross sections is mild.

H(gluon fustion) [pb] Z [pb] LHC 13 TeV

1603.09222 ATLAS-CONF-2016-081

CT14 NNLO 90% C.L., mpole

c =1.3 GeV

BHPS1 BHPS2 BHPS3 SEA1 SEA2 40 45 50 1850 1900 1950 2000 2050 W- [nb] W+ [nb] LHC 13 TeV

1603.09222

CT14 NNLO 90% C.L., mpole

c =1.3 GeV

BHPS1 BHPS2 BHPS3 SEA1 SEA2 8.0 8.5 9.0 9.5 11.0 11.5 12.0

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SLIDE 14

mc and <x>IC dependence

H(gluon fustion) [pb] Z [pb] LHC 13 TeV CT14 NNLO 90% C.L., mpole

c =1.3 GeV CT14IC BHPS, Q0=1.0 GeV mpole

c =1.5

mpole

c =1.1

<x>IC=0% <x>IC=3%

41 42 43 44 45 1850 1900 1950 W- [nb] W+ [nb] LHC 13 TeV CT14 NNLO 90% C.L., mpole

c =1.3 GeV

CT14IC BHPS, Q0=1.0 GeV mpole

c =1.1

mpole

c =1.5

8.0 8.2 8.4 8.6 8.8 9.0 11.0 11.2 11.4 11.6 11.8 12.0 H(gluon fustion) [pb] Z [pb] LHC 13 TeV CT14 NNLO 90% C.L., mpole

c =1.3 GeV

CT14IC SEA, Q0=1.0 GeV mpole

c =1.5

mpole

c =1.1

<x>IC=0% <x>IC=3%

41 42 43 44 45 1850 1900 1950 W- [nb] W+ [nb] LHC 13 TeV CT14 NNLO 90% C.L., mpole

c =1.3 GeV

CT14IC SEA, Q0=1.0 GeV mpole

c =1.1

mpole

c =1.5

8.0 8.2 8.4 8.6 8.8 9.0 11.0 11.2 11.4 11.6 11.8 12.0

BHPS SEA

  • LHC 13 TeV
  • CT14NNLO

@ 90%CL

  • mc = 1.1-1.5 GeV
  • <x>IC = 0 - 3%
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SLIDE 15

Z+c @ LHC 13 TeV, NLO

5 −

10

4 −

10

3 −

10

2 −

10

1 −

10

CT14nnlo BHPS2 BHPS3 SEA1 SEA2

(pb/GeV)

Z T

/dp σ d LHC 13 TeV

100 200 300 400 500 600 1 1.2 1.4 1.6 1.8 2 CT14nnlo PDF unc.

Ratio to CT14nnlo

(GeV)

Z T

p

5 −

10

4 −

10

3 −

10

2 −

10

1 −

10

Sherpa CT14nnlo Sherpa BHPS2 Sherpa BHPS3 Sherpa SEA1 Sherpa SEA2 MCFM CT14nnlo

(pb/GeV)

Z T

/dp σ d LHC 13 TeV 100 200 300 400 500 600 1 1.1 1.2 1.3 1.4 1.5 Ratio to Sherpa CT14nnlo

(GeV)

Z T

p

Fixed order Parton Shower with Sherpa

  • High pT excess of BHPS models is dampened by parton showers.
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SLIDE 16

CT17p : new data to be included

  • Combined HERA 1+2 DIS

update ✔︎

  • LHCb 7 TeV Z,W muon rapidity distribution

update ✔︎

  • LHCb 8 TeV Z,W muon rapidity distribution

update ✔︎

  • ATLAS 7 TeV inclusive jet

update ✔︎

  • CMS 7 TeV inclusive jet (extended y range)

update ✔︎

  • ATLAS 7 TeV Z pT distribution

NEW ✔︎

  • LHCb 13 TeV Z rapidity distribution

update

  • CMS 8 TeV Z pT and rapidity distribution (double diff.)

NEW

  • CMS 8 TeV W muon rapidity distribution

update

  • ATLAS 7 TeV W/Z lepton rapidity distribution

update

  • CMS 7,8 TeV tT differential distribution

NEW

  • ATLAS 7,8 TeV tT differential distribution

NEW

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SLIDE 17

ATLAS 8 TEV ttbar Data

  • Eur. Phys. J. C76 (2016) 538,

arXiv: 1511.04716

  • Mttbar, pt

T, |yt|, |yttbar|

  • Theory: Michal Czakon, David

Heymes and Alexander Mitov

  • fastNLO tables with NNLO

QCD, arXiv:1704.08551

ATLAS 8 TeV Data

Data: Eur. Phys. J. C76 (2016) 538, arXiv: 1511.04716 Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at 8 TeV using the ATLAS detector

  • Micha Cza, David Heyes ad Aexader Mitv reease

fastNLO tabes with NNLO QCD top-quark pair production at 8TeV arXiv:1704.08551

ATLAS 8 TeV Data

Data: Eur. Phys. J. C76 (2016) 538, arXiv: 1511.04716 Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at 8 TeV using the ATLAS detector

  • Micha Cza, David Heyes ad Aexader Mitv reease

fastNLO tabes with NNLO QCD top-quark pair production at 8TeV arXiv:1704.08551

Including

distribution data

  • || Shows the least agreement with

NNLO prediction, with MRST2008nnlo PDFs.

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SLIDE 18

Correlation with g-PDF @ 100 GeV

Strong correlation at large x

Correlation of -PDF @ 100 GeV

  • (t)
  • X

Strong correlation of g-PDF found in large x region.

X X

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SLIDE 19

Estimating impact of new data

ePump: error PDF updating method package

  • a package for (very quickly) estimating impact of new data using

Hessian eigenvector PDFs

  • C.-P. Yuan, J. Pumplin, CS: arXiv: 1708.xxxxx
  • based on ideas of H. Paukkunen and P. Zurita [1402.6623]
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SLIDE 20

CT14 updated by ATLAS ttbar

  • Largest impact on central fit from |yt| or |yttbar| at large x
  • But impact on error bands is small

0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14nn x g(x,Q) at Q =100.0 GeV 90%C.L.

CT14nn CT14+ytW1/CT14nn CT14+ytW3/CT14nn

0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14nn x g(x,Q) at Q =1.3 GeV 90%C.L.

CT14nn CT14+ytW1/CT14nn CT14+ytW3/CT14nn

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9

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SLIDE 21

Compare three results:

  • CT14HERA2
  • CT14HERA2-jet: remove from fits all four inclusive jet data (CDF and

D0 Run-2, ATLAS 7 TeV 35 pb-1 and CMS 7 TeV 5 pb-1)

  • CT14HERA2-jet+yt: add back ATLAS 8 TeV |yt| data

Can ATLAS 8 TeV Data provide the same g-PDF information as the inclusive jet data from the Tevatron and the LHC, included in CT14 global analysis?

  • A. Tursun et al.
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SLIDE 22

ATLAS 8 TeV ttbar Data and g-PDF

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14HERA2-jet x g(x,Q) at Q =1.3 GeV 90%C.L.

CT14HERA2-jet CT14HERA2/CT14HERA2-jet CT14HERA2-jet+yt/CT14HERA2-jet

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 Error bands of g(x,Q) x g(x,Q) at Q =1.3 GeV 90%C.L.

CT14HERA2-jet CT14HERA2 CT14HERA2-jet+yt

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14HERA2-jet x g(x,Q) at Q =100.0 GeV 90%C.L.

CT14HERA2-jet CT14HERA2/CT14HERA2-jet CT14HERA2-jet+yt/CT14HERA2-jet

0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 Error bands of g(x,Q) x g(x,Q) at Q =100.0 GeV 90%C.L.

CT14HERA2-jet CT14HERA2 CT14HERA2-jet+yt

0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9

Error band reduces

  • nly small amount

compared to inclusive jet data. Central value gets pulled in same direction as jet data.

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SLIDE 23

CMS 7 TeV jet Data and g-PDF

CMS 7 TeV accounts a large part of the reduction of the error bands.

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14HERA2-jet x g(x,Q) at Q =1.3 GeV 90%C.L.

CT14HERA2-jet CT14HERA2/CT14HERA2-jet CT14HERA2-jet+CMS7/CT14HERA2-jet

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 Error bands of g(x,Q) x g(x,Q) at Q =1.3 GeV 90%C.L.

CT14HERA2-jet CT14HERA2 CT14HERA2-jet+CMS7

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14HERA2-jet x g(x,Q) at Q =100.0 GeV 90%C.L.

CT14HERA2-jet CT14HERA2/CT14HERA2-jet CT14HERA2-jet+CMS7/CT14HERA2-jet

0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 Error bands of g(x,Q) x g(x,Q) at Q =100.0 GeV 90%C.L.

CT14HERA2-jet CT14HERA2 CT14HERA2-jet+CMS7

0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9

Same exercise, but instead add back CMS 7 TeV jet data

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SLIDE 24

Full jet Data and g-PDF

A verification of ePump methodology

Finally, add back all four jet data sets

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14HERA2-jet x g(x,Q) at Q =1.3 GeV 90%C.L.

CT14HERA2-jet CT14HERA2/CT14HERA2-jet CT14HERA2-jet+jet/CT14HERA2-jet

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 Error bands of g(x,Q) x g(x,Q) at Q =1.3 GeV 90%C.L.

CT14HERA2-jet CT14HERA2 CT14HERA2-jet+jet

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14HERA2-jet x g(x,Q) at Q =100.0 GeV 90%C.L.

CT14HERA2-jet CT14HERA2/CT14HERA2-jet CT14HERA2-jet+jet/CT14HERA2-jet

0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 Error bands of g(x,Q) x g(x,Q) at Q =100.0 GeV 90%C.L.

CT14HERA2-jet CT14HERA2 CT14HERA2-jet+jet

0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9

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SLIDE 25

Summary – CT14IC

  • Fitted charm c(x,Q0) approximates for universal twist-4 terms plus
  • ther missing terms higher order in αs and Λ2/mc

2

  • Universal ladder contributions can be resummed for Q2>>mc

2 in any version of ACOT scheme

  • Assume non-universal Λ2/mc

2 terms can be neglected.

  • Constraints give <x>IC < 2% for BHPS model and <x>IC < 1.6% for

SEA model at 90% CL with Q0=Qc=mc=1.3 GeV

  • Impact of IC on LHC predictions is still within standard CT14 NNLO

uncertainties

  • Enhancement of Z+c production at high pT(Z) is predicted in the BHPS

model (assuming universality), but final-state parton showering dampens the enhancement.

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SLIDE 26

Summary – ATLAS 8 TeV ttbar

  • ATLAS 8 TeV ttbar differential cross section data does not strongly

modify the CT14 gluon PDF.

  • When used to replace inclusive jet data, it has similar pull on central

gluon fit, but gives substantially weaker constraints.

  • Impact of ttbar data on uncertainties of gg-> H is at the sub-percent

level.

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SLIDE 27

Backup Slides

slide-28
SLIDE 28

CT17p : theory issues

FastNLO/ApplGrid interface:

  • MC statistical errors in tabulated K-factors
  • MC statistical errors in generated ApplGrid tables
  • Especially in tail regions

Inclusion of the theoretical uncertainties through scale variations with certain assumptions on correlations, e.g,

Note jitter, especially at high rapidities

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SLIDE 29

CT14 updated by ATLAS ttbar

  • Largest impact on central fit from |yt| or |yttbar| at large x
  • But impact on error bands is small

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14nn x g(x,Q) at Q =1.3 GeV 90%C.L.

CT14nn CT14+yttW1/CT14nn CT14+yttW3/CT14nn

0.0 0.5 1.0 1.5 2.0 10-4 10-3 10-2 10-1 0.2 0.5 0.9 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14nn x g(x,Q) at Q =100.0 GeV 90%C.L.

CT14nn CT14+yttW1/CT14nn CT14+yttW3/CT14nn

0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9

slide-30
SLIDE 30

Another test of ePump

0.5 1.0 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9 PDF Ratio to CT14HERA2mD0W x d(x,Q)/u(x,Q) at Q =1.3 GeV 90%C.L.

CT14HERA2mD0W CT14HERA2/CT14HERA2mD0W ePump/CT14HERA2mD0W

0.5 1.0 1.5 10-4 10-3 10-2 10-1 0.2 0.5 0.9

  • CT14HERA2
  • CT14HERA2mD0W: remove

D0 W asymmetry data

  • ePump: add back D0 W

asymmetry data with ePump