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• W4387078727 abstract "A bstract We present a new simulation for Higgs boson production in association with bottom quarks ( $$ boverline{b}H $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>H</mml:mi> </mml:math> ) at next-to-leading order (NLO) accuracy matched to parton showers in hadronic collisions. Both contributions, the standard one proportional to the bottom-quark Yukawa coupling and the loop-induced one proportional to the top-quark Yukawa coupling from the gluon-fusion process, are taken into account in a scheme with massive bottom quarks. Therefore, we provide the full simulation of the $$ boverline{b}H $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>H</mml:mi> </mml:math> final state in the Standard Model, which constitutes also a crucial background to measurements for Higgs-boson pair ( HH ) production at the Large Hadron Collider when at least one of the Higgs bosons decays to bottom quarks. So far, the modeling of the $$ boverline{b}H $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>H</mml:mi> </mml:math> final state induced one of the dominant theoretical uncertainties to HH measurements, as the gluon-fusion component was described only at the leading order (LO) with uncertainties of $$ mathcal{O} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>O</mml:mi> </mml:math> (100%). Including NLO corrections in its simulation allows us to reduce the scale dependence to $$ mathcal{O} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>O</mml:mi> </mml:math> (50%) so that it becomes subdominant with respect to other systematic uncertainties. As a case study, we provide an in-depth analysis of the $$ boverline{b}H $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>H</mml:mi> </mml:math> background to HH measurements with realistic selection cuts in the 2 b 2 γ channel. We also compare our novel simulation with the currently-employed ones, discussing possible issues and shortcomings of a scheme with massless bottom quarks. Finally, we propagate the effect of the new $$ boverline{b}H $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>H</mml:mi> </mml:math> simulation to HH searches in the 2 b 2 γ and 2 b 2 τ final states, and we find an improvement of up to 10% (20%) on the current (HL-LHC) limits on $$ {sigma}_{textrm{SM}}^{HH} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msubsup> <mml:mi>σ</mml:mi> <mml:mi>SM</mml:mi> <mml:mi>HH</mml:mi> </mml:msubsup> </mml:math> ." @default.
• W4387078727 created "2023-09-28" @default.
• W4387078727 creator A5000839716 @default.
• W4387078727 creator A5034371646 @default.
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• W4387078727 creator A5080570561 @default.
• W4387078727 date "2023-09-26" @default.
• W4387078727 modified "2023-09-28" @default.
• W4387078727 title "Taming a leading theoretical uncertainty in HH measurements via accurate simulations for $$ textrm{b}overline{textrm{b}}textrm{H} $$ production" @default.
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• W4387078727 doi "https://doi.org/10.1007/jhep09(2023)179" @default.
• W4387078727 hasPublicationYear "2023" @default.
• W4387078727 type Work @default.

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