v. chekelian, a. glazov, s.habib, a. nikiforov, r ...zhang/paper/hiq2final/t0110915.pdf · zhiqing...
TRANSCRIPT
T0, Physics Plenary 15/09/2011 1/45 Zhiqing Zhang
V. Chekelian, A. Glazov, S.Habib, A. Nikiforov,
R. Plačakytė, V. Radescu, E. Rizvi, S. Shushkevich,
T.H.Tran, Z.Zhang
1st part given by Eram on July 18th
https://www-h1.desy.de/iminutes/thursday/2011/07.18/Rizvi.pdf
T0, Physics Plenary 15/09/2011 2/45 Zhiqing Zhang
1. NC cross section reported in 1st part - few minor changes cross section hardly affected
2. Final CC cross sections
3. HERA-I+II data combination
4. Combined QCD-EW fits
5. Paper draft
T0, Physics Plenary 15/09/2011 3/45 Zhiqing Zhang
- HERAPDF1.0 is used instead of H1 PDF 2010
- MC stat uncertainty is added to uncorrelated error
- QED rad. cor. uncertainty applied differently (shift method)
Little effects on the previously reported cross sections
T0, Physics Plenary 15/09/2011 4/45 Zhiqing Zhang
- Lumi & Polarisation - Breakthrough on PSCC samples - All efficiencies (trigger, vtx, bkg finders) reevaluated - Dependence on hadronisation models - Comparison of two analyses - Final cross sections
T0, Physics Plenary 15/09/2011 5/45 Zhiqing Zhang
Polarisation [%] -60 -40 -20 0 20 40 60
] -1Lu
min
osity
[nb
0
2000
4000
6000
8000
10000p-e
Polarisation [%] -60 -40 -20 0 20 40 60
] -1Lu
min
osity
[nb
0
2000
4000
6000
8000
10000 p+e
2009 Compton based lumi. corr. To be updated
No update on polarisation since 2007
T0, Physics Plenary 15/09/2011 6/45 Zhiqing Zhang
Observations: Large discrepancy observed between PSCC data and CC MC and/or PSCC MC
Breakthrough: Bug on missing FST hits/vertex in PSCC data found by Sasha & Ringaile, fixed by Sergey
Before
After
T0, Physics Plenary 15/09/2011 7/45 Zhiqing Zhang
Based on PSCC samples Evaluated period-by-period Here an example for 0607 R (after reweighting using track multiplicity distribution)
Quoted syst. Uncertainties:
3% 1.5%
T0, Physics Plenary 15/09/2011 8/45 Zhiqing Zhang
Using subtriggers: 66 (Etmiss>2) 67 (Electron1) 77 (Etmiss>1)
Based on PSCC data
Applied to CC MC -either in x-Q2 bins -or parameterized in PT-γh
Difference covered mostly by quoted uncertainty: 15%(1-ε) + 0.2%
T0, Physics Plenary 15/09/2011 9/45 Zhiqing Zhang
Ex. 0607 R
Quoted uncertainty: 2% (y<0.08), 1% (y>0.08)
T0, Physics Plenary 15/09/2011 10/45 Zhiqing Zhang
γp: Dominant ep background
Vap/Vp: efficient cut variable
Syst. uncertainty: ± 0.02 around the nominal value
γp background normalisation checked to be within ±30% with - Vap/Vp distribution (before cut) & - Tagged sample in e-tagger
T0, Physics Plenary 15/09/2011 11/45 Zhiqing Zhang
2 = 300 GeV2Q 2 = 300 GeV2Q 2 = 300 GeV2Q 2 = 500 GeV2Q 2 = 500 GeV2Q 2 = 500 GeV2Q 2 = 1000 GeV2Q 2 = 1000 GeV2Q 2 = 1000 GeV2Q
2 = 2000 GeV2Q 2 = 2000 GeV2Q 2 = 2000 GeV2Q 2 = 3000 GeV2Q 2 = 3000 GeV2Q 2 = 3000 GeV2Q 2 = 5000 GeV2Q 2 = 5000 GeV2Q 2 = 5000 GeV2Q
2 = 8000 GeV2Q 2 = 8000 GeV2Q 2 = 8000 GeV2Q 2 = 15000 GeV2Q 2 = 15000 GeV2Q 2 = 15000 GeV2Q
LH Data+0304-0607eHERAPDF10
CC
0
0.2
0.4
0.6
0.8
CC
0
0.2
0.4
0.6
0.8
CC
0
0.2
0.4
0.6
0.8x
-210 -110
x-210 -110
x-210 -110
Example with L, e+
No extra uncertainty for CDM/MEPS, covered by Vap/Vp variation
T0, Physics Plenary 15/09/2011 12/45 Zhiqing Zhang
Largest syst. among the 4 data samples
T0, Physics Plenary 15/09/2011 13/45 Zhiqing Zhang
x
Example for 0607 L
Shown are for - ratio of ds2/dxdQ2 [left] - comparison of ds/dQ2 [bottom]
Two analyses differ mainly in background rejection cuts with different finders/ optimisation
T0, Physics Plenary 15/09/2011 14/45 Zhiqing Zhang
Method: Sasha’s combination method as used in previous publications
Data samples: - HERA-I: all published high Q2 NC, CC cross section data - HERA-II: merge L, R data samples and correct for small residual Pe
Applications: - xF3 extraction (double differential NC e+/e- cross sections) - “Universality” plot (single differential NC, CC, e+/e- cross sections)
T0, Physics Plenary 15/09/2011 15/45 Zhiqing Zhang
- Fit Strategy
- Input data sets
- Correlation across the data sets
- Comparison/validation of two fitting programmes
- Heavy flavour mass scheme, PDF para. optimisation
- Results
T0, Physics Plenary 15/09/2011 16/45 Zhiqing Zhang
Following the strategy of previous publication in 2005 (based on HERA-I data):
Fit EW parameters and PDFs simultaneously
Expect additional sensitivity from HERA-II - polarised beam - higher stat data samples
T0, Physics Plenary 15/09/2011 17/45 Zhiqing Zhang
Table 4 in the paper draft
T0, Physics Plenary 15/09/2011 18/45 Zhiqing Zhang
δpol
+P1
-P1
+P2
-P2
Table 5 in the paper draft
T0, Physics Plenary 15/09/2011 19/45 Zhiqing Zhang
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
QCDFIT
H1fitter(10p,old 2)
H1
68% CL
Standard Model
au
v u
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
-1 -0.8 -0.6 -0.4 -0.2 0 0.2
QCDFIT
H1fitter(10p,old 2)
H1
68% CL
Standard Model
adv d
Both use HERAPDF1.0 parametrisation and zero mass HF scheme
Very similar contours Difference contour size still to be understood
T0, Physics Plenary 15/09/2011 20/45 Zhiqing Zhang
To be added or Refer to Voica’s presentation for pre-t0 talk
T0, Physics Plenary 15/09/2011 21/45 Zhiqing Zhang
Table 8, to be updated with final fit results
T0, Physics Plenary 15/09/2011 22/45 Zhiqing Zhang
Version 0.7 sent to referees on 6th early morning
Version 0.7 sent to referees on 6th early morning
The paper contains - 8 sections, > 30 tables, >25 figures
T0, Physics Plenary 15/09/2011 23/45 Zhiqing Zhang
θtrack-θclus vs. θclus compared between Data/MC Error band: ± 1mrad
]o [clus
20 40 60 80 100 120 140
[mra
d]cl
us
tr
ack
-4
-2
0
2
4
6
8 H1 Collaboration
HER
A-II
p+H1 NC eMC
1 mrad± clusMC,
]o [clus
20 40 60 80 100 120 140
[mra
d]cl
us
tr
ack
-4
-2
0
2
4
6
8 H1 Collaboration
HER
A-II
pH1 NC eMC
1 mrad± clusMC,
T0, Physics Plenary 15/09/2011 24/45 Zhiqing Zhang
T0, Physics Plenary 15/09/2011 25/45 Zhiqing Zhang
PT and y balance plots vs. PT,e and γhad shown for combined e+, e- data & MC Error band: ± 1% variation
]o [had20 40 60 80 100 120 140 160 180
DA
/yha
dy
0.9
0.92
0.94
0.96
0.98
1
1.02
1.04
1.06
1.081.1
H1 Data NCNC MC
1%±NC MC
H1 Collaboration
HER
A-II
[GeV]elecTP
10 20 30 40 50 60 70 80 90 100
elec
T /
Pha
dTP
0.94
0.96
0.98
1
1.02
1.04
1.06
H1 Data NCNC MC
1%±NC MC
H1 Collaboration
HER
A-II
T0, Physics Plenary 15/09/2011 26/45 Zhiqing Zhang
[GeV]zE-P30 40 50 60 70 80 90
eve
nts
310
0
10
20
30
40
50
60
[GeV]eE’0 5 10 15 20 25 30 35 40 45 50
eve
nts
310
0
5
10
15
20
25
30
35
]o [e
0 20 40 60 80 100 120 140 160
Even
ts
1
10
210
310
410
510
610 pH1 NC Data eNC MC + Bkg MCBkg MC
H1 Collaboration
HER
A-II
[GeV]zE-P30 40 50 60 70 80 90
eve
nts
310
0
10
20
30
40
50
60
70
[GeV]eE’0 5 10 15 20 25 30 35 40 45 50
eve
nts
310
0
5
10
15
20
25
30
35
40
]o [e
0 20 40 60 80 100 120 140 160
Even
ts
1
10
210
310
410
510
610 p+H1 NC Data eNC MC + Bkg MCBkg MC
H1 Collaboration
HER
A-II
MC reweighted to HERAPDF1.0
T0, Physics Plenary 15/09/2011 27/45 Zhiqing Zhang
Jet based PT balance, jet angle and E-pz distributions shown for e+, e- & MC
T0, Physics Plenary 15/09/2011 28/45 Zhiqing Zhang
Ee, θe, E-pz distributions shown for e+, e- & MC
T0, Physics Plenary 15/09/2011 29/45 Zhiqing Zhang
MC reweighted to HERAPDF1.0
[GeV]T,hP0 10 20 30 40 50 60 70 80 90 100
Even
ts
200
400
600
800
1000
H1 Collaborationp CC Data+H1 e
MC (CC + Bkg)MC (Bkg)
MEPSMCCDMMC
[GeV]zE-P0 10 20 30 40 50 60
Even
ts
100
200
300
400
500
600
p/VapV0.00 0.05 0.10 0.15 0.20 0.25 0.30
Even
ts
-110
1
10
210
310
410
510
HER
A II
[GeV]T,hP0 10 20 30 40 50 60 70 80 90 100
#Eve
nts
200
400
600
800
1000
1200
H1 Collaborationp CC Data+H1 e
MC (CC + Bkg)MC (Bkg)
MEPSMCCDMMC
[GeV]zE-P0 10 20 30 40 50 60
#Eve
nts
100
200
300
400
500
600
700
800
900
p/VapV0.00 0.05 0.10 0.15 0.20 0.25 0.30
#Eve
nts
-110
1
10
210
310
410
510
HER
A II
T0, Physics Plenary 15/09/2011 30/45 Zhiqing Zhang
]2 [GeV2Q
310 410
]2 [p
b/G
eV2
/dQ
d
-710
-610
-510
-410
-310
-210
-110
1
10
210
310
Y<0.9
H1 Collaboration
HER
A-II
p NC, P = -37.6%+H1 e
p NC, P = 32.5%+H1 e
HERAPDF 1.0, P = -37.6%
HERAPDF 1.0, P = 32.5%
]2 [GeV2Q
310 410
]2 [p
b/G
eV2
/dQ
d
-710
-610
-510
-410
-310
-210
-110
1
10
210
310
Y<0.9
H1 Collaboration
HER
A-II
p NC, P = -26.0%H1 e
p NC, P = 36.9%H1 e
HERAPDF 1.0, P = -26.0%
HERAPDF 1.0, P = 36.9%
]2 [GeV2Q310 410
(HER
APD
F 1.
0)2
/dQ
/d2/d
Qd 0.6
0.8
1
1.2
1.4
1.6
1.8
Y<0.9
H1 Collaboration
HER
A-II
p NC, P = -26.0%_ H1 e
p NC, P = 36.9%_ H1 e
HERAPDF 1.0 Uncert
310
0.90.95
11.05
1.1
]2 [GeV2Q310 410
(HER
APD
F 1.
0)2
/dQ
/d2/d
Qd 0.6
0.8
1
1.2
1.4
1.6
1.8
Y<0.9
H1 Collaboration
HER
A-II
p NC, P = -37.6%+H1 ep NC, P = 32.5%+H1 e
HERAPDF 1.0 Uncert
310
0.90.95
11.05
1.1
Lumi uncertainty unshown, no fitted normalisation shift applied
T0, Physics Plenary 15/09/2011 31/45 Zhiqing Zhang
Direct evidence of parity violation in DIS NC with minimal sensitivity to PDFs
A =2
PR − PL
σ±(PR)− σ±(PL)σ±(PR) + σ±(PL)
� ∓κaeF γZ
2
F2
T0, Physics Plenary 15/09/2011 32/45 Zhiqing Zhang
]2 [GeV2Q
310 410
]2 [p
b/G
eV2
/dQ
d
-610
-510
-410
-310
-210
-110
1
Y<0.9
H1 Collaboration
HER
A-II
= -37.6%ep CC, P+H1 e
= 32.5%ep CC, P+H1 e
= -37.6%eHERAPDF 1.0, P
= 32.5%eHERAPDF 1.0, P
]2 [GeV2Q
310 410
]2 [p
b/G
eV2
/dQ
d
-610
-510
-410
-310
-210
-110
1
Y<0.9
H1 Collaboration
HER
A-II
= -26.0%ep CC, P_ H1 e
= 36.9%ep CC, P_ H1 e
= -26.0%eHERAPDF 1.0, P
= 36.9%eHERAPDF 1.0, P
]2 [GeV2Q310 410
(HER
APD
F 1.
0)2
/dQ
/d2/d
Qd
0.4
0.6
0.8
1
1.2
1.4
1.6
Y<0.9
H1 Collaboration
HER
A-II
p CC, P = -37.6%+H1 e
p CC, P = 32.5%+H1 e
HERAPDF 1.0 Uncert
]2 [GeV2Q310 410
(HER
APD
F 1.
0)2
/dQ
/d2/d
Qd
0.4
0.6
0.8
1
1.2
1.4
1.6
Y<0.9
H1 Collaboration
HER
A-II
p CC, P = -26.0%_ H1 e
p CC, P = 36.9%_ H1 e
HERAPDF 1.0 Uncert
Lumi uncertainty unshown, no fitted normalisation shift applied
T0, Physics Plenary 15/09/2011 33/45 Zhiqing Zhang
]2 [p
b/G
eV2
/dQ
d
-710
-510
-310
-110
10
]2 [GeV2Q310 410
p CC+H1 e
p CC-H1 e
p CC (HERAPDF 1.0)+SM e
p CC (HERAPDF 1.0)-SM e
p NC+H1 ep NC-H1 e
p NC (HERAPDF 1.0)+SM ep NC (HERAPDF 1.0)-SM e
y < 0.9 = 0eP
Beautiful demonstration of unification of electromagnetic & weak forces in DIS
Text book plot
T0, Physics Plenary 15/09/2011 34/45 Zhiqing Zhang
At low Q2, γ-exchange dominant Little polarisation effect
At high Q2, Z, γ-Z contribute Parity violation effect visible
H1 CollaborationNC
HER
A-II
X X
p, P = -26.0%_ H1 NC e
p, P = 36.9%_ H1 NC e
p, P = -_ HERAPDF 1.0, e
p, P = 3_ HERAPDF 1.0, e
-210 -110 1
2 = 30000 GeV2Q
-210 -110 1
2 = 20000 GeV2Q
-210 -110 1
0.5
1
1.5 2 = 12000 GeV2Q
2 = 8000 GeV2Q2 = 5000 GeV2Q2 = 3000 GeV2Q
0.5
1
1.5 2 = 2000 GeV2Q
2 = 1500 GeV2Q2 = 1200 GeV2Q2 = 1000 GeV2Q
0.5
1
1.5 2 = 800 GeV2Q
2 = 650 GeV2Q2 = 500 GeV2Q2 = 400 GeV2Q
0.5
1
1.5 2 = 300 GeV2Q
2 = 250 GeV2Q2 = 200 GeV2Q2 = 150 GeV2Q
0.5
1
1.5 2 = 120 GeV2Q
T0, Physics Plenary 15/09/2011 35/45 Zhiqing Zhang
H1 CollaborationNC
HER
A-II
X X
p, P = -37.6%+H1 NC e
p, P = 32.5%+H1 NC e
HERAPDF 1.0, P = -37.6%
HERAPDF 1.0, P = 32.5%
-210 -110 1
2 = 30000 GeV2Q
-210 -110 1
2 = 20000 GeV2Q
-210 -110 1
0.5
1
1.5 2 = 12000 GeV2Q
2 = 8000 GeV2Q2 = 5000 GeV2Q2 = 3000 GeV2Q
0.5
1
1.5 2 = 2000 GeV2Q
2 = 1500 GeV2Q2 = 1200 GeV2Q2 = 1000 GeV2Q
0.5
1
1.5 2 = 800 GeV2Q
2 = 650 GeV2Q2 = 500 GeV2Q2 = 400 GeV2Q
0.5
1
1.5 2 = 300 GeV2Q
2 = 250 GeV2Q2 = 200 GeV2Q2 = 150 GeV2Q
0.5
1
1.5 2 = 120 GeV2Q
At low Q2, γ-exchange dominant Little polarisation effect
At high Q2, Z, γ-Z contribute Parity violation effect visible
T0, Physics Plenary 15/09/2011 36/45 Zhiqing Zhang
H1 CollaborationCC
HER
A-II
X X X-210 -110 -210 -110 -210 -110
1
2
2 = 300 GeV2Q 2 = 500 GeV2Q 2 = 1000 GeV2Q
0.5
1
1.5
2 = 2000 GeV2Q 2 = 3000 GeV2Q 2 = 5000 GeV2Q
0
0.5
1
2 = 8000 GeV2Q 2 = 15000 GeV2Q = -26.0%
ep, P_ H1 CC e
= 36.9%e
p, P_ H1 CC e = -26.
ep, P_ HERAPDF 1.0, e
= 36.9e
p, P_ HERAPDF 1.0, e
H1 CollaborationCC
HER
A-II
X X X-210 -110 -210 -110 -210 -110
1
2
2 = 300 GeV2Q 2 = 500 GeV2Q 2 = 1000 GeV2Q
0.5
1
1.5
2 = 2000 GeV2Q 2 = 3000 GeV2Q 2 = 5000 GeV2Q
0
0.1
0.2
0.3
0.42 = 8000 GeV2Q 2 = 15000 GeV2Q
= -37.6%ep, P+H1 CC e = 32.5%ep, P+H1 CC e
= -37.6%eP+ HERAPDF 1.0, e = 32.5%eP+ HERAPDF 1.0, e
W exchange Maximal parity violation effect Large difference in L & R CC cross sections
T0, Physics Plenary 15/09/2011 37/45 Zhiqing Zhang
Little sensitivity to Pe L & R samples combined
Future FL measurement when Ep=460, 575GeV will be ready
[GeV]2Q
210 3100.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
p+H1 NC epH1 NC e
p+HERAPDF 1.0, epHERAPDF 1.0, e
H1 Collaboration
Y<0.9 = 0eP
NC
HER
A-II
T0, Physics Plenary 15/09/2011 38/45 Zhiqing Zhang
H1 CollaborationNC
HER
A-I+
II
X X
= 0ep, P_ H1 NC e
= 0e
p, P+ H1 NC e
= 0ep, P_ HERAPDF 1.0, e
= 0e
p, P+ HERAPDF 1.0, e
-210 -110 1
2 = 30000 GeV2Q
-210 -110 1
0.2
0.4
0.6
2 = 20000 GeV2Q
2 = 12000 GeV2Q2 = 8000 GeV2Q2 = 5000 GeV2Q
0.5
1
1.5 2 = 3000 GeV2Q
2 = 2000 GeV2Q2 = 1500 GeV2Q2 = 1200 GeV2Q
0.5
1
1.5 2 = 1000 GeV2Q
2 = 800 GeV2Q2 = 650 GeV2Q2 = 500 GeV2Q
0.5
1
1.5 2 = 400 GeV2Q
2 = 300 GeV2Q2 = 250 GeV2Q2 = 200 GeV2Q
0.5
1
1.5 2 = 150 GeV2Q
Improved precision
γ dominance et low Q2 σ(e+) ~ σ(e-)
γZ increases as Q2 σ(e+) ≠ σ(e-)
T0, Physics Plenary 15/09/2011 39/45 Zhiqing Zhang
1 10 210 310 410 510 610-310
-210
-110
1
10
210
310
410
510
610x = 0.00005, i = 21
x = 0.00008, i = 20x = 0.00013, i = 19
x = 0.00020, i = 18x = 0.00032, i = 17
x = 0.0005, i = 16x = 0.0008, i = 15
x = 0.0013, i = 14x = 0.0020, i = 13
x = 0.0032, i = 12x = 0.005, i = 11
x = 0.008, i = 10x = 0.013, i = 9
x = 0.02, i = 8x = 0.032, i = 7
x = 0.05, i = 6
x = 0.08, i = 5
x = 0.13, i = 4x = 0.18, i = 3x = 0.25, i = 2
x = 0.40, i = 1
x = 0.65, i = 0
p+ H1 NC ep_ H1 NC e2H1 Low Q
Fixed TargetH1PDF 2009
p+ HERAPDF 1.0, ep_ HERAPDF 1.0, e
HER
A I +
II
H1 Collaboration
]2 [GeV2Q
i) x
22
(x,Q
NC
±
Scaling variation vs. Q2 Shown for fixed x shown
T0, Physics Plenary 15/09/2011 40/45 Zhiqing Zhang
2 = 300 GeV2Q 2 = 300 GeV2Q 2 = 300 GeV2Q 2 = 500 GeV2Q 2 = 500 GeV2Q 2 = 500 GeV2Q 2 = 1000 GeV2Q 2 = 1000 GeV2Q 2 = 1000 GeV2Q
2 = 2000 GeV2Q 2 = 2000 GeV2Q 2 = 2000 GeV2Q 2 = 3000 GeV2Q 2 = 3000 GeV2Q 2 = 3000 GeV2Q 2 = 5000 GeV2Q 2 = 5000 GeV2Q 2 = 5000 GeV2Q
2 = 8000 GeV2Q 2 = 8000 GeV2Q 2 = 8000 GeV2Q 2 = 15000 GeV2Q 2 = 15000 GeV2Q 2 = 15000 GeV2Q 2 = 30000 GeV2Q 2 = 30000 GeV2Q 2 = 30000 GeV2Q
H1 CC eHERAPDF 1.0x(u+c)
0
1
2
3
0
0.5
1
1.5
0
0.5
1
X-210 -110
X-210 -110
X-210 -110
H1 Collaboration
HERA
I +
II
cc
2 = 300 GeV2Q 2 = 300 GeV2Q 2 = 300 GeV2Q 2 = 500 GeV2Q 2 = 500 GeV2Q 2 = 500 GeV2Q 2 = 1000 GeV2Q 2 = 1000 GeV2Q 2 = 1000 GeV2Q
2 = 2000 GeV2Q 2 = 2000 GeV2Q 2 = 2000 GeV2Q 2 = 3000 GeV2Q 2 = 3000 GeV2Q 2 = 3000 GeV2Q 2 = 5000 GeV2Q 2 = 5000 GeV2Q 2 = 5000 GeV2Q
2 = 8000 GeV2Q 2 = 8000 GeV2Q 2 = 8000 GeV2Q 2 = 15000 GeV2Q 2 = 15000 GeV2Q 2 = 15000 GeV2Q+H1 CC e
HERAPDF 1.0x(d+s)2(1-y)
0
0.5
1
1.5
2
0
0.2
0.4
0.6
0.8
0
0.1
0.2
0.3 X-210 -110
X-210 -110
X-210 -110
H1 Collaboration
HERA
I +
II
cc
CC cross sections fluctuation much reduced with combined HERA-I+II data Unique data sets to separate d/u quark flavours
T0, Physics Plenary 15/09/2011 41/45 Zhiqing Zhang
To be updated with combined HERA-I+II data
T0, Physics Plenary 15/09/2011 42/45 Zhiqing Zhang
[%]eP-100 -50 0 50 100
[pb]
CC
tot
0
20
40
60
80
100
120XpeH1 HERA-IH1 HERA-II
Xp+eH1 HERA-IH1 HERA-II
HERAPDF 1.0
Linear Fit
H1 Collaboration
Y<0.92>400 GeV2Q
Linear fit results:
e-p data: σ(Pe=+1)=-0.94 ± 2.44 ± 1.67 ± 2.65 (pb) (exp) (lumi) (pol) e+p data: σ(Pe=-1)=-1.44 ± 1.33 ± 0.68 ± 0.85 (pb)
95%CL Feldman-Cousins limits on right handed current: σ(Pe=+1) < 7.0 pb (e-p) σ(Pe=-1) < 2.1 pb (e+p)
95%CL lower mass limits on MWR assuming SM couplings & light right handed neutrinos:
MWR>194 GeV (e-p) 208 GeV (e+p)
T0, Physics Plenary 15/09/2011 43/45 Zhiqing Zhang
To be added when the fit is finalized
T0, Physics Plenary 15/09/2011 44/45 Zhiqing Zhang
Precision competitive with D0 & LEPWW To be updated with final results from H1fitter
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
vu-au-vd-ad-PDF
vu-au-PDF
H1
68% CL
Standard Model
LEP EWWG
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Standard Model
LEP EWWGD0 (4-D)D0 (2-D)
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T0, Physics Plenary 15/09/2011 45/45 Zhiqing Zhang
- NC & CC cross sections now final
- HERA-I+II combination performed
- Combined QCD-EW fit being finalised