same fi nal state! b_bbar_4l ttb_NLO_dec hvq Impact of radiative - - PowerPoint PPT Presentation

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same fi nal state! b_bbar_4l ttb_NLO_dec hvq Impact of radiative - - PowerPoint PPT Presentation

Aug 21, 2022 196 likes •853 views

same fi nal state! b_bbar_4l ttb_NLO_dec hvq Impact of radiative corrections in top decays Summary b_bbar_4l : @NLO, allrad scheme hvq : top-pair production @NLO, decay @LO In conclusion,

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same final state!

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b_bbar_4l ttb_NLO_dec hvq

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➤ In conclusion, radiative corrections in top decays have dramatic impact both on ... ➢ jet related observables; ➢ and observables constructed from jets.

Impact of radiative corrections in top decays

➤ Summary ➢ b_bbar_4l: @NLO, allrad scheme ➢ hvq: top-pair production @NLO, decay @LO

radiation from fully governed by SMC

b_bbar_4l ttb_NLO_dec hvq

harderst emission from governed by POWHEG

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➤ transverse momentum, no cuts ➢ b_bbar_4l: exact ➢ ttb_NLO_dec: included via LO reweighting ➢ hvq: no

Jet vetoes and contribution

b_bbar_4l NLO

10% difference due to missing contribution in hvq more important at small

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➤ ➢ b_bbar_4l: exact ➢ ttb_NLO_dec: included via LO reweighting ➢ hvq: no

b_bbar_4l NLO b_bbar_4l NLO

Jet vetoes and contribution

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➤ ➢ b_bbar_4l: exact ➢ ttb_NLO_dec: included via LO reweighting ➢ hvq: no

b_bbar_4l NLO b_bbar_4l NLO

Jet vetoes and contribution

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➤ Summary ➢ b_bbar_4l: exact ➢ ttb_NLO_dec: included via LO reweighting ➢ hvq: no ➤ In conclusion ➢ relative weight of the contribution important at small values

  • f jet transverse momentum;

➢ jet-vetoed cross sections involve enhanced contribution which are: ❧ completely missing in hvq ❧ significantly underestimated in ttb_NLO_dec.

Jet vetoes and contribution