H-COUP toward version 2 1. Introduction: top-down vs. bottom-up - - PowerPoint PPT Presentation

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H-COUP toward version 2 1. Introduction: top-down vs. bottom-up - - PowerPoint PPT Presentation

Nov 18, 2023 181 likes •316 views

H-COUP toward version 2 1. Introduction: top-down vs. bottom-up Kentarou Mawatari 2. H-COUP in a nutshell 3. H-COUP 3-min tutorial 4. H-COUP toward v.2 5. Summary and outlook 21st NHWG - Osaka - 2017.12.23 1 /12 Kentarou

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12

H-COUP — toward version 2 —

Kentarou Mawatari

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1. Introduction:
 top-down vs. bottom-up 2. H-COUP in a nutshell 3. H-COUP 3-min tutorial 4. H-COUP toward v.2 5. Summary and outlook

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12

The SM cannot be the ultimate theory !

2 CONF-2015-081 (diphoton) Butter et al. [1604.03105, JHEP]

How can we find BSM physics?

✓Find new particles/

phenomena.

➡ Top-down approach: 


SUSY, ExtraD, 2HDM, ...

✓Find small deviations from

the SM expectation.

➡ Top-down approach: 


SUSY, ExtraD, 2HDM, ...

➡ Bottom-up approach:

Effective field theory (EFT)

PAS EXO-16-052 (mono-higgs) Kanemura et al. [1705.05399, PRD]

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12

Top-down vs. Bottom-up

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Top-down approach Bottom-up approach

UV model : SUSY, ExtraDim, extended Higgs, …

{L; m1, m2, · · · , g1, g2, · · · }

EFT : SM gauge group, particles

{L; Λ, c1, c2, · · · }

deviation from SM

L = LSM + 1 Λ2 X

i

ciOD6

i

+ · · ·

h H h

predict find

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Kentarou Mawatari (Osaka U.) 20th NHWG - Osaka - 2017.08.18 /20

Higgs Characterisation (HC)

based on the effective field theory (EFT)

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  • HC1 (spin-0,1,2): “A framework for Higgs characterisation” [1306.6464, JHEP]


Artoisenet, de Aquino, Demartin, Frederix, Frixione, Maltoni, Mandal, Mathews, Mawatari, Ravindran, Seth,
 Torrielli, Zaro

  • HC2 (VBF/VH): “Higgs characterisation via

VBF/VH: NLO and parton-shower effects” [1311.1829, EPJC]
 Maltoni, Mawatari, Zaro

  • HC3 (GF(H+jets)/ttH): “Higgs characterisation at NLO: CP properties of the top

Yukawa” [1407.5089, EPJC]
 Demartin, Maltoni, Mawatari, Page, Zaro

  • HC4 (tH): “Higgs production in association with a single top quark at the LHC” [1504.00611, EPJC]


Demartin, Maltoni, Mawatari, Zaro

  • HC5 (tWH): “tWH associated production at the LHC” [1607.05862, EPJC]


Demartin, Maier, Maltoni, Mawatari, Zaro

  • HC provides an automated NLO(QCD)+PS accurate tool and predictions to

accomplish the most general and accurate characterisation of Higgs interactions in the main production and decay modes at the LHC.

  • The model file is publicly available at the FeynRules repository:


https://feynrules.irmp.ucl.ac.be/wiki/HiggsCharacterisation


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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12

Extending the SM Lagrangian

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Top-down approach Bottom-up approach

UV model : SUSY, ExtraDim, extended Higgs, …

{L; m1, m2, · · · , g1, g2, · · · }

EFT : SM gauge group, particles

{L; Λ, c1, c2, · · · }

deviation from SM

L = LSM + 1 Λ2 X

i

ciOD6

i

+ · · ·

h H h

predict find

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12 6

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12 7 Kanemura, Kikuchi, Yagyu [1511.06211, NPB] Kanemura, Kikuchi, Yagyu [1502.07716, NPB]

Singlet extension 2HDM

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12 8 Kanemura, Kikuchi, Yagyu [1511.06211, NPB]

Singlet extension

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12

H-COUP 3-min tutorial

  • go to the H-COUP webpage
  • download the H-COUP file (and the manual

[arXiv:1710.04603])

  • (install LoopTools.)
  • unzip the file.
  • edit Makefile.
  • make/run.

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12 10 [1312.5571]

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12

Higgs decay widths with H-COUP (v.2)

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+QCD corrections if f=b,c

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Kentarou Mawatari (Osaka U.) 21st NHWG - Osaka - 2017.12.23 /12

H-COUP: past, present and future

  • H-COUP v.1 was released last October.
  • numerically calculates the renormalized Higgs

couplings at one loops in various extended Higgs models (singlet extension, 2HDM, inert doublet, …).

  • By using and extending H-COUP v.1, we are

calculating Higgs decay widths (v.2).

  • By interfacing H-COUP to event generators, we could

explore the Higgs sector in productions at the LHC as well as ILC, etc (v.3?).

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