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Steve King
SHEP BSM Group 18/19
Elena Perdomo
Pasquale Di Bari
Steve King
Kareem Farrag Susana Sedgewick Sam Rowley
Ye-Ling Zhou
Huchan Lee Rome Samanta Adam Forster Josu Hernandez Adam Murphy
Introductory talk on Beyond the Standard Models of Particle Physics - - PowerPoint PPT Presentation
Introductory talk on Beyond the Standard Models of Particle Physics - - PowerPoint PPT Presentation
Introductory talk on Beyond the Standard Models of Particle Physics and Cosmology Steve King SHEP BSM Group 18/19 Steve King Rome Samanta Ye-Ling Zhou Pasquale Di Bari Josu Adam Adam Hernandez Huchan Lee Murphy Forster Susana Elena
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The Standard Models of Particle Physics & Cosmology
dR dR dR
eR eR eR
dR dR dR
uR uR uR uR uR uR
cR cR cR
tR tR tR
µR
τR τR
µR
U(1)Y SU(3)C
νatm
R
νatm
R
νatm
R
νsol
R
νsol
R
νdec
R
νdec
R
SFK 1510.02091
leave many questions unanswered...
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BSM Motivations
- Hierarchy problem - Higgs mass << Planck scale
- Origin of neutrino mass - unknown
- 28 parameters - surely too many
- 3 generations - why?
- 3 forces unification -
- Gravity - stands apart from SM
- Dark matter & Dark energy - not explained
- Why only matter in the universe?
SHEP BSM group addresses all these questions
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Dark Matter?
Kareem Farrag Adam Murphy
Elena Perdomo
Ye-Ling Zhou
- many new models of DM
proposed by group members
- DM is studied in combination
with other phenomenologies (leptogenesis, B anomalies, astrophysical observations also in collaboration with Astro group and collider constraints)
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BSM with Cosmology and Neutrinos
- Philosophical approach: There are two possible outcomes: if the result confirms the hypothesis, then
you have made a discovery. If the result is contrary to the hypothesis, then you have made a discovery (E. Fermi)
- Pragmatic approach: Still solid motivations for New Physics come from Cosmology and Neutrinos:
Cosmological puzzles:
- Dark Matter (very strong)
- Matter-Antimatter asymmetry (strong)
- Inflation (quite strong)
- Accelerating Universe expansion (likely)
Two reasons not to despair after LHC null results (so far and barring anomalies!):
Neutrino masses and mixing (obvious indication of BSM physics because of SM definition, less obvious to which extent SM has to be extended)
It is reasonable that the same BSM physics responsible for neutrino masses and mixing can also address the cosmological puzzles:
Finding scenarios able to realise this connection is our main research line but also…
….the connection itself involves fascinating physics: non-equilibrium systems, kinetic theory (Boltzmann equations, density matrix equations, QKE, Schwinger-Dyson equations,flavour effects), GR and beyond, Gravitational Waves (NEW GIFT), cosmic rays, neutrino telescopes, fluid-dynamics, self-gravitating systems, non-standard cosmology,…..
?
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ηB = nB − n ¯
B
nγ = nB nγ ≈ 6 × 10−10
Leptogenesis - the leading candidate for the baryon asymmetry of the Universe
Leptogenesis in Littlest Seesaw Leptogenesis in GUTs of Flavour
Fred Bjorkeroth Postdoc in Frascati Marco Chianese (just moved to GRAPPA)
SLIDE 15
Flavour
Why three families? Why these masses?
Recently study of Steve King and Ye-Ling Zhou on how discrete flavour symmetries can rise from the breaking of SO(3) using supersymmetric potentials (1809.10292)
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b c s u d e t
Origin of quark and lepton masses?
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d s b u c t ν ν ν ν ν ν
1 2 3 e μ τ
CKM PMNS
[Stone, 1212.6374]
Origin of quark and lepton mixing?
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Strong Weak Electromagnetic
Unification
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Tiank YOU
We welcome new students!