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Dark sector showers and hadronisation in Herwig 7 (2024)
Journal Article
Kulkarni, S., Masouminia, M. R., Plätzer, S., & Stafford, D. (2024). Dark sector showers and hadronisation in Herwig 7. The European Physical Journal C, 84(11), Article 1210. https://doi.org/10.1140/epjc/s10052-024-13587-8

We present a novel simulation of a strongly interacting dark sector also known as the Hidden Valley scenarios using angular ordered showers and the cluster hadronisation model in Herwig 7. We discuss the basics of this implementation and the scale hi... Read More about Dark sector showers and hadronisation in Herwig 7.

Generalized angular-order parton showers in Herwig 7 (2024)
Journal Article
Lee, J.-B., Masouminia, M. R., Seymour, M. H., & Yang, U.-K. (2024). Generalized angular-order parton showers in Herwig 7. Journal of High Energy Physics, 2024(8), Article 64. https://doi.org/10.1007/jhep08%282024%29064

This paper presents the inaugural investigation of beyond the Standard Model (BSM) radiation processes, framed as a generalized, process- and model-independent parton shower algorithm within Herwig 7, based on direct translations of Universal FeynRul... Read More about Generalized angular-order parton showers in Herwig 7.

Hadronization and decay of excited heavy hadrons in Herwig 7 (2024)
Journal Article
Masouminia, M. R., & Richardson, P. (2024). Hadronization and decay of excited heavy hadrons in Herwig 7. Journal of High Energy Physics, 2024(7), Article 278. https://doi.org/10.1007/jhep07%282024%29278

We revisit the hadronization and decay of excited heavy mesons and heavy baryons in Herwig 7 general-purpose event-generator, following four distinct steps: (i) Passing through the polarisation of heavy hadrons at the end of parton shower through the... Read More about Hadronization and decay of excited heavy hadrons in Herwig 7.

Implementation of angularly ordered electroweak parton shower in Herwig 7 (2022)
Journal Article
Masouminia, M., & Richardson, P. (2022). Implementation of angularly ordered electroweak parton shower in Herwig 7. Journal of High Energy Physics, 2022(4), Article 112. https://doi.org/10.1007/jhep04%282022%29112

We discuss the necessary steps for implementing an angularly ordered (AO) electroweak (EW) parton shower in Herwig 7 multi-purpose event generator. This includes calculating the helicity-dependent quasi-collinear EW branching functions that correspon... Read More about Implementation of angularly ordered electroweak parton shower in Herwig 7.

Maximally symmetric three-Higgs-doublet model (2021)
Journal Article
Darvishi, N., Masouminia, M., & Pilaftsis, A. (2021). Maximally symmetric three-Higgs-doublet model. Physical Review D, 104(11), https://doi.org/10.1103/physrevd.104.115017

We consider the general three-Higgs-doublet model (3HDM) and identify all limits that lead to exact Standard Model (SM) alignment. After discussing the underlying symmetries that can naturally enforce such an alignment, we focus on the most economic... Read More about Maximally symmetric three-Higgs-doublet model.

Signature of the maximally symmetric 2HDM via W±/Z -quadruplet productions at the LHC (2021)
Journal Article
Darvishi, N., & Masouminia, M. (2021). Signature of the maximally symmetric 2HDM via W±/Z -quadruplet productions at the LHC. Physical Review D, 103(9), Article 095031. https://doi.org/10.1103/physrevd.103.095031

We consider the maximally symmetric two-Higgs doublet model (MS-2HDM) in which the so-called Standard Model (SM) alignment can be achieved naturally by the virtue of an SO(5) symmetry imposed on the 2HDM. We investigate the signature of the MS-2HDM v... Read More about Signature of the maximally symmetric 2HDM via W±/Z -quadruplet productions at the LHC.

Herwig 7.2 release note (2020)
Journal Article
Bellm, J., Bewick, G., Ferrario Ravasio, S., Gieseke, S., Grellscheid, D., Kirchgaeßer, P., Loshaj, F., Masouminia, M. R., Nail, G., Papaefstathiou, A., Plätzer, S., Podskubka, R., Rauch, M., Reuschle, C., Richardson, P., Schichtel, P., Seymour, M. H., Siódmok, A., & Webster, S. (2020). Herwig 7.2 release note. The European Physical Journal C, 80(5), Article 452. https://doi.org/10.1140/epjc/s10052-020-8011-x

A new release of the Monte Carlo event generator Herwig (version 7.2) is now available. This version introduces a number of improvements over the major version 7.0, notably: multi-jet merging with the dipole shower at LO and NLO QCD; spin correlation... Read More about Herwig 7.2 release note.