Precision Measurementsafter the Higgs Discovery

M.V. ChizhovSofia University, Bulgaria and JINR, Russia

10/06/2014

July 4, 20122

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Is it the Higgs, or isn’t Higgs?

2210 s

2310 s

2410 s

2510 s

Mean Lifetime and Branching Ratios of the Higgs Boson

4

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F Hs

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1

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M. A. Shifman, A. I. Vainshtein, M. B. Voloshin, and V. I. Zakharov, Sov. J. Nucl. Phys. 30 (1979) 711

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SM Higgs Production at the LHChttps://twiki.cern.ch/twiki/bin/view/LHCPhysics/CrossSections

LHC in 2012 at record luminosity (7 × 1033 cm-2s-1) and energy (8 TeV) was producing SM Higgs bosons (MH = 125 GeV) at a rate ~ 6𝟓 𝟎/hr

s[pb]

19.27

1.578

0.7046 0.4153

0.1293

125 GeV

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Higgs Boson Signalfrom the Last ATLAS Data

AT

LA

S-C

ON

F-2

013-

014

H

0.50.6

m 125.5 GeV

0.2(stat)

(sys)

6AT

LA

S-C

ON

F-2

013-

108

Phys. Lett. B 726 (2013) 88 (July 4, 2013)

(Nov 28, 2013)

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Higgs Coupling Constantsfrom ATLAS and CMS Results

Hm 125.7 0.3(stat) 0.3(sys) GeV

7

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Higgs Spin/Parity at TevatronJ. Ellis, D. S. Hwang, V. Sanz and T. You, JHEP 1211 (2012) 134;

D0 Note 6387-CONF (2013), D0 Note 6406-CONF (2013)

Idea from D. J. Miller, S. Y. Choi, B. Eberle, M. M. Muhlleitner and P. M. Zerwas, Phys. Lett. B505 (2001) 149. Discriminating power is provided by the threshold behaviour of the cross section: s-wave for 0+ s ~ b, p-wave for 0- s ~ b3, d-wave for 2+ s ~ b5.

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Results

Phys. Lett. B 726 (2013) 120 Phys. Rev. D 89 (2014) 09207arXiv:1312.5353

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Spin and Parity of New Boson:Evidence for 0+ Nature of the Higgs

The orange (blue) band represents the 1σ, 2σ, and 3σ around the median expected value for the SM Higgs boson hypothesis (alternative hypothesis). The black point represents the observed value. The hypotheses of a pseudoscalar and all tested spin-one boson hypotheses are excluded at a 99,9% confidence level or higher. All tested spin-two boson hypotheses are excluded at a 95% confidence level or higher.

Expected (blue triangles/dashed lines) and observed (black circles/solid lines) confidence level CLs for alternative spinparity hypotheses assuming a 0+ signal.

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Universal Fit (LHC+TeVatron)P.P. Giardino, K. Kannike, I. Masina, M. Raidal

and A. Strumia, arXiv:1303.3570 [hep-ph]

/

0.98 0.0 12

0.98 0.07

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2

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( )

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t

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W

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There is no other Higgs

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„за теоретичното откритие на механизма, допринасящ за разбирането на произхода на масата на субатомните частици и който наскоро беше потвърден чрез откриването на предсказаната фундаментална частица от ATLAS и CMS експериментите на Големия Адронен Колайдер в ЦЕРН“

The Nobel Prize in Physics 2013 was awarded jointly to François Englert and Peter W. Higgs "for the theoretical discovery of a mechanism that contributes to our understanding of the origin of mass of subatomic particles, and which recently was confirmed through the discovery of the predicted fundamental particle, by the ATLAS and CMS experiments at CERN's Large Hadron Collider"

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Elementary Particles and Interactions of the Standard Model

2

4 params

| | ( ) 2 params

Y 13 params

SM

i ij j

D F F

D V

L

15

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Standard Model Extrapolationto the Planck Energy

D. Buttazzo, G. Degrassi, P.P. Giardino, G.F. Giudicе, F. Sala, A. Salvio, A. StrumiaarXiv:1307.3536 [hep-ph]

Figure from Giardino’s slides

16

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MW and mt precise measurements

CDF and D0 Collaborations,Phys. Rev. D 88 (2013) 052018 (arXiv:1307.7627)

ATLAS, CDF, CMS and D0 CollaborationsarXiv:1403.4427 [hep-ex]

See, however, CMS-PAS-TOP-14-001:mtop = 172.22 ± 0.73 GeV

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SM predictions versus measurementsEffect of Higgs Mass Knowledge

http://gfitter.desy.de

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The Latest Measurementsof the Higgs Properties

No yet combination of CMS and ATLAS results with the full run 1 dataset: scheduled for Fall 2014

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Tight Higgs Width Constraint!CMS: arXiv:1405.3455

Impossible directly due to experimental resolution, but using idea byFabrizio Caola and Kirill Melnikov, Phys. Rev. D 88 (2013) 054024

2 2resonance (on-shell) production:

( ) ( ) in H f H in H f

H H

g gin H BR H f

2 2off-shell production: ( ) H in H fin f g g

Assuming presence of the SM interactions only:SM5.4 22 MeVH H

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No evidence yetfor H bb decay

Tevatron combination: Phys. Rev. D 88, 052014 (2013)

m = 1.6 ± 0.7

ATLAS-CONF-2013-079 CMS PAS HIG-13-012

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No H Zg decay signal yet

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No H mm decay signal yetATLAS-CONF-2013-010 CMS PAS HIG-13-007

CMS also has Upper Limiton Br(H→ee) < 0.0017(SM prediction is ~ 5*10-9)

stat syst

H

m 125.7 0.3 0.3 GeVm 0.6 GeVH

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Precise Higgs-Boson Mass Measurements

stat sys

stat sy

stat syst

H stat sys

t

st

t

m( ) 125.98 0.42 0.28 Gem 125.36 0.37 0.18 GeV

Vm( 4 ) 124.51 0.52 0.04 GeV

m 1.47 0.67 0.28 GeVH

HH

Considerable reduction of systematic uncertainties on individual measurements

Shown at LHCP last week for first time; paper to be submitted shortly

stat syst

H stat syst

m 125.55 0.31 0.23 GeVm 0.2 0.6 0.6 GeV

my estimation!

H

CMS-PAS-HIG-13-005

CMS-PAS-HIG-13-001 (March 2013)

CMS: Phys. Rev. D 89 (2014) 09207stat systm( 4 ) 125.6 0.4 0.2 GeVH

stat systm( ) 125.4 0.5 0.6 GeVH

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Higgs Couplings Measurements ATLAS-CONF-2014-009 CMS-PAS-HIG-13-005

0.170.15

1.15 0.18

0.99

V

F

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0.91 0.20V

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0.150.12

1.08

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g

0.84 0.11

0.97 0.18

g

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Top-Pair Production at LHC

Strong collaboration between theoretical and experimental researchers10/06/2014 27

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Single Top Production at Tevatron

CDF: 0.96 0.09(stat+syst) 0.05(theory)

0.78 at 95% C.L.

D0:

0.79 at 95% C.L

tb

tb

tb

V

V

V

.

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Single-Top Production at LHC

t-channel s-channeltW

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10/06/2014 31Victor E. Bazterra

10/06/2014 32Victor E. Bazterra

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FR = -0.009 ± 0.006(stat.) ± 0.020(syst.),

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35

“Stairway to Heaven”

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Heavy Flavour Physicswill be discussed in Augusto Ceccucci talk

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Precision measurement of tau lepton mass by BESIII

arXiv:1405.1076 [hep-ex]

BESIII 0.100.131776.91 0.12 MeV [96 ppm]m

PDG 2012

0.510 998 928(11) MeV [21.5 ppb]

10 5.658 3715(35) MeV [33.1 ppb]

1776.82(16) MeV [90 ppm]

em

m

m

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3

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5( )( )

192

( ) ( ) ( )

F

F F F

G e mBr e

G e G e G

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MEG + → e + Phys. Rev. Lett. 110 (2013) 201801; arXiv:1303.0754

[hep-ex]

BR(+ → e+ ) < 5.7 10-13

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2

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Peculiarity of Neutrino Physics

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L

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39

Mixing matrices in quark and lepton sectors

Cabibbo-Kobayashi-Maskawa

Pontecorvo-Maki-Nakagawa-Sakata

3 i

2

3 i 2

1 e

1

(1 e ) 1

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CKM cd cs cb

td ts tb

d s b

u V V V

V c V V V

t V V V

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d d

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2

3

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PMNSU

i

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1 2 3

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6 3 2

1

e e

e

e 1 e 2 1

6e

3

e

e2

e e e

PMNS

e U U U

U U UU

U U U

Wolfenstein parameterization

10/06/2014 40P. F. Harrison, D. H. Perkins and W. G. Scott, Phys. Lett. B 530 (2002) 167

4 2 2 0

3 1

R1 33

, , ; , , L LR

R RL L

uu d e

d e

ii

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Elementary Particles and Interactions of the Standard Theory

2

4 params

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Y 13 params

SM

i ij j

D F F

D V

L

41

n3n2n1 Lepton sector is least known:+9 parameters(5 known, 4 unknown)Neither electron neutrino, nor muon and tau neutrinos are real particles!

e 1 2 3

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OscillationsThe two necessary conditions for neutrino oscillations:

UPMNS is non-identity matrix: the flavour states are different from the mass states m1 m2 m3: non-degeneracy of the mass states

22 2 2

3 3 02

22* *3121

0 3 3 2 22 231 31

sin (1 ) sin sin (1 )( ) 4 8 cos( ) ( )

(1 ) (1 )

2 2, , arctan , .

4

e e

F ee e

V V VP U U

V V V

m L G N EmU U U U V

m E m

O

2 2 2 5 221 2 1

2 5 231

7.54(20) 10 eV

2.43(8) 10 eV

m m m

m

Oscillations!

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First indications of non-zero Ue3

and negative CP-phase d from T2K

Phys.Rev.Lett. 107 (2011) 041801arXiv:1106.2822 [hep-ex]

→ e Appearance!

PR

L 112 (

2014)

06180

2

arXiv:1405.3871

NH: 1.1

9

8

0% CL allo

IH: 0.91 0.0

0.15

wed interva s

8

l

new results

The T2K beam has restarted, including antineutrino test data.

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Ue3 = sin 13 e-i

2 22 2 4 2 231 21

13 13 12( ) 1 sin 2 sin cos sin 2 sin4 4e e

m L m LP

E E

e → e Disappearance

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Daya Bay sin2 213 fit from rate and energy spectra

Phys.Rev.Lett.112 (2014) 061801e-Print: arXiv: 1310.6732 [hep-ex]

2 0.00813 0.009

2 0.019 3 231 0.020

sin 2 0.090 ( 10 )

2.59 10 eVm

213

2 0.010 3 231 0.011

with 621 days of data:

sin 2 0.084 0.005 ( 17 )

2.44 10 eVm

Neutrino 2014

48

How burns the reactor?

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How burns the Sun?

pp-cycle >99% energy production

5 ν species

CNO-cycle <1% energy production

3 ν species

Neutrinos are produced in several reactions in both cycles

5050

,Borexino

Solar Neutrinos: the predicted spectrum

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BorexinoarXiv:1308.0443

7

9 2 1

Be (862 keV)

9 2 1SSM

(4.43 0.22) 10 cm s

4.47(1 0.07) 10 cm s

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Accuracy determination ofmass differences and mixing angles

F. Capozzi, G.L. Fogli, E. Lisi, A. Marrone, D. Montanino, A. Palazzo

Phys. Rev. D89 (2014) 093018arXiv:1312.2878v2 [hep-ph] 5 May

2014

after Neutrino 2014 (June 2-7)

2 2 2 2 221 12 13 32 23 sin sin sin

3.2% 5.5% 8.3% 2.5% 13%

m m

2 2 2 2 221 12 13 32 23 sin sin sin

2.4% 4.2% 2.5% 1 6% 3%

m m

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2 22 2 2 2 1

sol 2 1 atm 3, .2

m mm m m

Neutrino Mass Spectrum

23 1

2

3

1

2 1

0.058 eV

2

ii

m m

m m

m

22 3

21 3

3

1

0.098

2

eV

2

ii

m m

m

m

m

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2

sensitive to effective Majorana

mass :

(0 )

ei ii

m U m

m

A M

Neutrinoless double beta (0nbb) decay

There are claims for 0νββ signal by Klapdor-Kleingrothaus et al.

0 76 0.37

0 76 0.44

251 2 0

251 2

.23

0.31

Phys. Lett. B 586 (2004) 198( Ge) 1.19 10 yr (4.2 )

(0.2 0.6) eV

Mod. Phys. Lett. A 21 (2006) 1547( Ge) 2.23 10 yr (7.2 )

(0.32 0.0

T

T

m

m

3) eV

GERDA CollaborationPhys. Rev. Lett. 111 (2013) 122503

0 76 251 2

0 251 2

( Ge) 2.1 10 yr @ 90%CLcombination of GERDA+HdM+IGEX:

3.0 10 yr @ 90%CL

T

T

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KamLAND-Zen and EXO-200 0 nbb 136Xe experiments

0 136 251 2 ( Xe) 1.1 10 yr

(0.19 0.45) eV

@ 90% CL

T

m

EXO-200, Nature (2014) doi:10.1038/nature13432KamLAND-Zen, Phys.

Rev. Lett. 110 (2013) 0625020 136 25

1 2 ( Xe) 1.9 10 yr

@ 90% CL

T

0 136 251 2 ( Xe) 3.4 10 yr

(0.

combined resul

12 0.25) eV

t

@ 90% L

:

C

T

m

GERDA combinedTheoretical and

experimental constraints in

the plane charted by the

0 nbb half-lives of 76Ge and 136Xe

56

The effective Majorana mass asa function of the lightest neutrino mass

0.05 eVT½~1027 y

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Evidence of non-zero lightest neutrino mass

Baryonic Oscillation Spectroscopic Survey (BOSS)

The 2.5-meter Sloan telescope in New Mexico

South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey

BOSS

SPT-SZ

combination

1 2

3

3

1 2

Quasi-Degenerate masses

NH0.105 0.025 eV

0.116 0.022 eV IH

0.105 0.025 eV0.116 0.022 eV

m mm

mm m

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Lattice Calculations

2

3

2 ( )

10 MeV

13

(250 M

0.7 M

eV)

eV

u d

u d

uu dd

uu dd

m m mF

m m

F

60

Hadron mass spectrum in lattice calculations

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The Standard Model of fundamental particles and their interactions is finally reconfirmed and it acquires the status of a complete theory of elementary particles. It is self-consistent and could work up to the Planck energies.

It is in good shape: Neither new particles nor any deviations beyond the Standard Model up to distances 2.510-18 cm have been found. This size is two order of magnitude smaller than the scale of the weak interactions.

In the next year we expect almost double increase of the collider energy and more deeper penetration into the secrets of Nature.

By 2022 it is expected to gather 10 times more data and by 2030 100 times more data than we have now and at almost twice higher collider energy.

Conclusions

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Thank you for your attention!