All Outputs (51)

Lorentz violating backgrounds from quadratic, shift-symmetric, ultralight dark matter (2024)
Journal Article
Jiang, M., Pecjak, B. D., Perez, G., & Sankaranarayanan, S. (2024). Lorentz violating backgrounds from quadratic, shift-symmetric, ultralight dark matter. Journal of High Energy Physics, 2024(8), Article 114. https://doi.org/10.1007/jhep08%282024%29114

We consider an effective theory for a shift-symmetric, quadratically-coupled, ultralight spin-0 field. The leading CP conserving interactions with Standard Model fields in the effective theory arise at dimension 8. We discuss the renormalization grou... Read More about Lorentz violating backgrounds from quadratic, shift-symmetric, ultralight dark matter.

Using the effective weak mixing angle as an input parameter in SMEFT (2024)
Journal Article
Biekötter, A., Pecjak, B. D., & Smith, T. (2024). Using the effective weak mixing angle as an input parameter in SMEFT. Journal of High Energy Physics, 2024(4), Article 73. https://doi.org/10.1007/jhep04%282024%29073

We implement electroweak renormalisation schemes involving the effective weak mixing angle to NLO in Standard Model Effective Field Theory (SMEFT). After developing the necessary theoretical machinery, we analyse a select set of electroweak precision... Read More about Using the effective weak mixing angle as an input parameter in SMEFT.

Electroweak input schemes and universal corrections in SMEFT (2023)
Journal Article
Biekötter, A., Pecjak, B. D., Scott, D. J., & Smith, T. (2023). Electroweak input schemes and universal corrections in SMEFT. Journal of High Energy Physics, 2023(7), Article 115. https://doi.org/10.1007/jhep07%282023%29115

The choice of an electroweak (EW) input scheme is an important component of perturbative calculations in Standard Model Effective Field Theory (SMEFT). In this paper we perform a systematic study of three different EW input schemes in SMEFT, in parti... Read More about Electroweak input schemes and universal corrections in SMEFT.

Potential and limitations of machine-learning approaches to inclusive |Vub| determinations (2022)
Journal Article
Biekötter, A., Kwok, K. W., & Pecjak, B. D. (2022). Potential and limitations of machine-learning approaches to inclusive |Vub| determinations. Journal of High Energy Physics, 2022(143), Article 143. https://doi.org/10.1007/jhep01%282022%29143

The determination of |Vub| in inclusive semileptonic B → Xuℓν decays will be among the pivotal tasks of Belle II. In this paper we study the potential and limitations of machine-learning approaches that attempt to reduce theory uncertainties by exten... Read More about Potential and limitations of machine-learning approaches to inclusive |Vub| determinations.

Higgs decay to fermion pairs at NLO in SMEFT (2020)
Journal Article
Cullen, J. M., & Pecjak, B. D. (2020). Higgs decay to fermion pairs at NLO in SMEFT. Journal of High Energy Physics, 2020(11), Article 79. https://doi.org/10.1007/jhep11%282020%29079

The calculation of next-to-leading order (NLO) perturbative corrections at fixed operator dimension in Standard Model Effective Field Theory (SMEFT) has been a topic of much recent interest. In this paper we obtain the NLO corrections from dimension-... Read More about Higgs decay to fermion pairs at NLO in SMEFT.

Top quark pair production at complete NLO accuracy with NNLO+NNLL′ corrections in QCD (2020)
Journal Article
Czakon, M., Ferroglia, A., Mitov, A., Pagani, D., Papanastasiou, A. S., Pecjak, B. D., Scott, D. J., Tsinikos, I., Wang, X., Yang, L. L., & Zaro, M. (2020). Top quark pair production at complete NLO accuracy with NNLO+NNLL′ corrections in QCD. Chinese Physics C, 44(8), Article 083104. https://doi.org/10.1088/1674-1137/44/8/083104

We describe predictions for top quark pair differential distributions at hadron colliders, by combining the next-to-next-to-leading order quantum chromodynamics calculations and next-to-leading order electroweak corrections with double resummation at... Read More about Top quark pair production at complete NLO accuracy with NNLO+NNLL′ corrections in QCD.

NLO corrections to h → bb¯ decay in SMEFT (2019)
Journal Article
Cullen, J. M., Pecjak, B. D., & Scott, D. J. (2019). NLO corrections to h → bb¯ decay in SMEFT. Journal of High Energy Physics, 2019(8), Article 173. https://doi.org/10.1007/jhep08%282019%29173

We calculate the full set of next-to-leading order (NLO) corrections to h → b b¯¯ decay in the dimension-6 Standard Model Effective Field Theory (SMEFT). Our calculation forms the basis for precision studies of this decay mode in effective field theo... Read More about NLO corrections to h → bb¯ decay in SMEFT.

Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections (2019)
Journal Article
Broggio, A., Ferroglia, A., Frederix, R., Pagani, D., Pecjak, B. D., & Tsinikos, I. (2019). Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections. Journal of High Energy Physics, 2019(8), Article 39. https://doi.org/10.1007/jhep08%282019%29039

This work studies the associated production of a top-quark pair with a W, Z, or Higgs boson at the LHC. Predictions for the total cross sections as well as for several differential distributions of the massive particles in the final state are provide... Read More about Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections.

Asymmetric heavy-quark hadroproduction at LHCb: predictions and applications (2019)
Journal Article
Gauld, R., Haisch, U., & Pecjak, B. D. (2019). Asymmetric heavy-quark hadroproduction at LHCb: predictions and applications. Journal of High Energy Physics, 2019(3), Article 166. https://doi.org/10.1007/jhep03%282019%29166

We present a phenomenological analysis of asymmetric bottom- and charm-quark production within the LHCb acceptance relevant for pp collisions at s√=13 TeV. Predictions are provided for both anti-kt bottom- and charm-jet pairs, which are kept differen... Read More about Asymmetric heavy-quark hadroproduction at LHCb: predictions and applications.

Resummation for rapidity distributions in top-quark pair production (2019)
Journal Article
Pecjak, B. D., Scott, D. J., Wang, X., & Yang, L. L. (2019). Resummation for rapidity distributions in top-quark pair production. Journal of High Energy Physics, 2019(3), Article 60. https://doi.org/10.1007/jhep03%282019%29060

We extend our framework for the simultaneous resummation of soft and small-mass logarithms to rapidity distributions in top quark pair production. We give numerical results for the rapidity distribution of the top quark or the anti-top quark, as well... Read More about Resummation for rapidity distributions in top-quark pair production.

Resummation for (boosted) top-quark pair production at NNLO+NNLL′ in QCD (2018)
Journal Article
Czakon, M., Ferroglia, A., Heymes, D., Mitov, A., Pecjak, B. D., Scott, D. J., Wang, X., & Yang, L. L. (2018). Resummation for (boosted) top-quark pair production at NNLO+NNLL′ in QCD. Journal of High Energy Physics, 2018(5), Article 149. https://doi.org/10.1007/jhep05%282018%29149

We construct predictions for top quark pair differential distributions at hadron colliders that combine state-of-the-art NNLO QCD calculations with double resummation at NNLL′ accuracy of threshold logarithms arising from soft gluon emissions and of... Read More about Resummation for (boosted) top-quark pair production at NNLO+NNLL′ in QCD.

Associated production of a top pair and a Z boson at the LHC to NNLL accuracy (2017)
Journal Article
Broggio, A., Ferroglia, A., Ossola, G., Pecjak, B. D., & Sameshima, R. D. (2017). Associated production of a top pair and a Z boson at the LHC to NNLL accuracy. Journal of High Energy Physics, 2017(04), Article 105. https://doi.org/10.1007/jhep04%282017%29105

We study the resummation of soft gluon emission corrections to the production of a top-antitop pair in association with a Z boson at the Large Hadron Collider to next-to-next-to-leading logarithmic accuracy. By means of an in-house parton level Monte... Read More about Associated production of a top pair and a Z boson at the LHC to NNLL accuracy.

NNLL resummation for the associated production of a top pair and a Higgs boson at the LHC (2017)
Journal Article
Broggio, A., Ferroglia, A., Pecjak, B., & Yang, L. (2017). NNLL resummation for the associated production of a top pair and a Higgs boson at the LHC. Journal of High Energy Physics, 2017(2), Article 126. https://doi.org/10.1007/jhep02%282017%29126

We study the resummation of soft gluon emission corrections to the production of a top-antitop pair in association with a Higgs boson at the Large Hadron Collider. Starting from a soft-gluon resummation formula derived in previous work, we develop a... Read More about NNLL resummation for the associated production of a top pair and a Higgs boson at the LHC.

Factorization for the light-jet mass and hemisphere soft function (2016)
Journal Article
Becher, T., Pecjak, B. D., & Shao, D. Y. (2016). Factorization for the light-jet mass and hemisphere soft function. Journal of High Energy Physics, 2016(12), Article 18. https://doi.org/10.1007/jhep12%282016%29018

Many collider observables suffer from non-global logarithms not captured by standard resummation techniques. Classic examples are the light-jet mass event shape in the limit of small mass and the related hemisphere soft function. We derive factorizat... Read More about Factorization for the light-jet mass and hemisphere soft function.

QCD radiative corrections for h→bb¯ in the standard model dimension-6 effective field theory (2016)
Journal Article
Gauld, R., Pecjak, B., & Scott, D. (2016). QCD radiative corrections for h→bb¯ in the standard model dimension-6 effective field theory. Physical Review D, 94(7), Article 074045. https://doi.org/10.1103/physrevd.94.074045

We calculate the O(αs) QCD corrections to the inclusive h→bb¯ decay rate in the dimension-6 standard model effective field theory (SMEFT). The QCD corrections multiplying the dimension-6 Wilson coefficients which alter the hbb¯-vertex at tree-level a... Read More about QCD radiative corrections for h→bb¯ in the standard model dimension-6 effective field theory.

Associated production of a top pair and a W boson at next-to-next-to-leading logarithmic accuracy (2016)
Journal Article
Broggio, A., Ferroglia, A., Ossola, G., & Pecjak, B. (2016). Associated production of a top pair and a W boson at next-to-next-to-leading logarithmic accuracy. Journal of High Energy Physics, 2016(09), Article 089. https://doi.org/10.1007/jhep09%282016%29089

We consider soft gluon emission corrections to the production of a top-antitop pair in association with a W boson at the Large Hadron Collider. We obtain a soft-gluon resummation formula for this production process which is valid up to next-to-next-t... Read More about Associated production of a top pair and a W boson at next-to-next-to-leading logarithmic accuracy.

Resummed differential cross sections for top-quark pairs at the LHC (2016)
Journal Article
Pecjak, B. D., Scott, D. J., Wang, X., & Yang, L. L. (2016). Resummed differential cross sections for top-quark pairs at the LHC. Physical Review Letters, 116(20), Article 202001. https://doi.org/10.1103/physrevlett.116.202001

We present state of the art resummation predictions for differential cross sections in top-quark pair production at the LHC. They are derived from a formalism which allows the simultaneous resummation of both soft and small-mass logarithms, which end... Read More about Resummed differential cross sections for top-quark pairs at the LHC.

One-loop corrections to h → bb¯ and h → ττ¯ decays in the Standard Model dimension-6 EFT: four-fermion operators and the large-m t limit (2016)
Journal Article
Gauld, R., Pecjak, B. D., & Scott, D. J. (2016). One-loop corrections to h → bb¯ and h → ττ¯ decays in the Standard Model dimension-6 EFT: four-fermion operators and the large-m t limit. Journal of High Energy Physics, 2016(5), Article 080. https://doi.org/10.1007/jhep05%282016%29080

We calculate a set of one-loop corrections to h → bb¯¯bb¯ and h → ττ¯¯¯ττ¯ decays in the dimension-6 Standard Model effective field theory (SMEFT). In particular, working in the limit of vanishing gauge couplings, we calculate directly in the broken... Read More about One-loop corrections to h → bb¯ and h → ττ¯ decays in the Standard Model dimension-6 EFT: four-fermion operators and the large-m t limit.

Associated production of a top pair and a Higgs boson beyond NLO (2016)
Journal Article
Broggio, A., Ferroglia, A., Pecjak, B. D., Signer, A., & Yang, L. L. (2016). Associated production of a top pair and a Higgs boson beyond NLO. Journal of High Energy Physics, 2016(3), Article 124. https://doi.org/10.1007/jhep03%282016%29124

We consider soft gluon emission corrections to the production of a top-antitop pair in association with a Higgs boson at hadron colliders. In particular, we present a soft-gluon resummation formula for this production process and gather all elements... Read More about Associated production of a top pair and a Higgs boson beyond NLO.

Beauty-quark and charm-quark pair production asymmetries at LHCb (2015)
Journal Article
Gauld, R., Haisch, U., Pecjak, B. D., & Re, E. (2015). Beauty-quark and charm-quark pair production asymmetries at LHCb. Physical Review D, 92(3), Article 034007. https://doi.org/10.1103/physrevd.92.034007

The LHCb Collaboration has recently performed a first measurement of the angular production asymmetry in the distribution of beauty quarks and antiquarks at a hadron collider. We calculate the corresponding standard model prediction for this asymmetr... Read More about Beauty-quark and charm-quark pair production asymmetries at LHCb.