sebastián andrés olivares pino c harged higgs triplet model signals at the lhc p ontificia u...

Sebastián Andrés Olivares Pino

CHARGED HIGGS TRIPLET MODEL SIGNALS AT THE LHC

PONTIFICIA UNIVERSIDAD CATÓLICA DE CHILE

4TH INTERNATIONAL HIGH ENERGY PHYSICS IN THE LHC ERAJANUARY 9, 2012 - UTFSM, VALPARAISO, CHILE

INTRODUCTION

Charged Higgs Triplet Model Signals at the LHC - January 2012, UTFSM Valparaiso Chile

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Why we introduce Higgs triplet fields?

Standard Model

MSSM

Higgs Triplet Model

one Higgs doublet

add one Higgs doublet

add one Higgs doublet and a triplet

All SM particles, except neutrinos

Supersymmetric partners

Neutrinos

HIGGS TRIPLET MODEL

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Vacuum Expectation Values (VEVs)


HIGGS TRIPLET MODEL

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Tadpole Equations


HIGGS TRIPLET MODEL

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HIGGS TRIPLET MODEL

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• and gauge fields• and SU(2) and U(1) group

couplings• and group generators

PARAMETERS RESTRICTIONS

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MODEL APROXIMATIONS

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Masses aproximation ()

κ must be little →0…0.0005

Must be negative for


LEPTONIC LAGRANGIAN

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: Yukawa coupling

LEPTONIC LAGRANGIAN

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neutrino mass!


: Yukawa coupling: Conjugate charge operator

HIGGS TRIPLET MODEL

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PHENOMENOLOGY

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Single Charged Decays

Low Energy:

High Energy:

small :


PHENOMENOLOGY

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Double Charged Decays

Low Energy:

High Energy:

small : leptonic decays dominates.


CROSS SECTION

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Structure Functions Partonic Cross Section

MC VEGAS Integration method

𝑃1

𝑃2

𝑥2

𝑥1


NUMBER OF EVENTS

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Cin channels

Cross Section reaches in channel

Single Charged

More events at low energy

Luminosity registered by ATLAS November 2011=

At low energy the favorite channel is:

The model predicts events!

Very few events at the moment

At low energy the favorite channel is:

The model predictsevents!

Very few events at the moment.

More events at low energy.

Double Charged


CONCLUSIONS

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• The Higgs Triplet Model can explain the neutrino mass with the inclusion of new fields.

• The leptonic couplings are proportional to the matrix, giving the advantage of measure the model phenomenology in neutrino and collider experiments.

• The most probable decay for the Double charged Higgs at low energies is to a pair of leptons, at high is to a Single Charged and a W boson.

• The most probable decay for the Single charged Higgs at low energies is to a Majoron and a W boson, at high is to a CP-Odd Higgs and a W boson.

• There are more events at low energy for the Single and Double Charged Higgs, being events with today’s ATLAS luminosity.

THANKS

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BACKUP

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HIGGS TRIPLET MODEL

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fases complejas(Violación CP)

Jerarquia Normal (NH): ∆ con

𝑣3 :𝑉𝐸𝑉 𝑑𝑒𝑙 𝑡𝑟𝑖𝑝𝑙𝑒𝑡𝑒→0…1000

𝛿 : 𝑓𝑎𝑠𝑒 𝑑𝑒𝐷𝑖𝑟𝑎𝑐 (𝑖𝑛𝑣𝑎𝑟𝑖𝑎𝑛𝑡𝑒𝐶𝑃 )→0 ,𝜋2,𝜋 ,

3𝜋2

𝜑1 ,𝜑2: 𝑓𝑎𝑠𝑒𝑠𝑑𝑒𝑀𝑎𝑗𝑜𝑟𝑎𝑛𝑎(𝑖𝑛𝑣𝑎𝑟𝑖𝑎𝑛𝑡𝑒𝐶𝑃 )→0 ,𝜋

𝜑1 ,𝜑2=0 ,𝛿=016 combinaciones que coinciden en 4 casos.

Conservación CP


HIGGS TRIPLET MODEL

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HIGGS TRIPLET MODEL

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HIGGS TRIPLET MODEL

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Aproximaciones de las Masas ()

κ debe ser pequeño →0…0.0005

debe ser negativo para que


HIGGS TRIPLET MODEL

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Decaimientos Simplemente Cargados

Bajas energías:

Altas energías:

pequeño:


HIGGS TRIPLET MODEL

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Decaimientos Doblemente Cargados

Bajas energías:

Altas energías:

pequeño: dominan decaimientos leptónicos


HIGGS TRIPLET MODEL

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Sección eficaz alcanza Canales

Sección eficaz solo alcanza ~ Canal

Más eventos a bajas energías Más eventos a bajas energías

Luminosidad registrada por ATLAS Agosto 2011=

A bajas energías el canal predilecto:

Se encontraron eventos!

Sin embargo, existen complicaciones al medir un canal con MET.

A bajas energías el canal predilecto:

Se encontraron eventos!

Muy pocos eventos por el momento.


sebastián andrés olivares pino c harged higgs triplet model signals at the lhc p ontificia u...

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