Benjamin C. Allanach
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Research Interests
Benjamin C. Allanach has a total of 1000 co-authors. Here are the top co-authors by number of shared publications:
- Ben Gripaios
University of Cambridge
13 shared publications - Stephen F. King
University of Southampton
13 shared publications - Peter Skands
Monash University
12 shared publications S. Heinemeyer
Instituto de Física Teórica, Universidad Autonoma de Madrid (IFT-UAM)
11 shared publications- Joe Davighi
CERN
10 shared publications - Joseph Tooby-Smith
Department of Physics LEPP Cornell University 14853 Ithaca NY USA
10 shared publications
Latest Publications
- Open Access
- 22 August 2026
- Published by Elsevier in Physics Letters B
- Vol. 881
The fundaments of unity: O(1) dimensionless couplings in quantum field theories
- 22 August 2026
- Published by Elsevier in Physics Letters B
- Vol. 881
Open AccessThe fundaments of unity: O(1) dimensionless couplings in quantum field theories
- Top Cited Papers
- 5 August 2026
- Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics A
- Vol. 41 (22)
Review of Particle Physics *
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,200 new measurements from 903 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Most of the 118 reviews are updated, including many that are heavily revised. The Review is divided into two volumes. Volume 1 includes the Summary Tables and 96 review articles. Volume 2 consists of the Particle Listings and contains also 22 reviews that address specific aspects of the data presented in the Listings. The complete Review (both volumes) is published online on the website of the Particle Data Group ( pdg.lbl.gov ) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print, as a web version optimized for use on phones, and as an Android app. The PDG API (Application Programming Interface) provides access to the data published in the Review in machine-readable format.
- 5 August 2026
- Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics A
- Vol. 41 (22)
Top Cited PapersReview of Particle Physics *
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,200 new measurements from 903 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Most of the 118 reviews are updated, including many that are heavily revised. The Review is divided into two volumes. Volume 1 includes the Summary Tables and 96 review articles. Volume 2 consists of the Particle Listings and contains also 22 reviews that address specific aspects of the data presented in the Listings. The complete Review (both volumes) is published online on the website of the Particle Data Group ( pdg.lbl.gov ) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print, as a web version optimized for use on phones, and as an Android app. The PDG API (Application Programming Interface) provides access to the data published in the Review in machine-readable format.
- Open Access
- 21 July 2026
- Published by Springer Nature in The European Physical Journal C
- Vol. 86 (7)
Erratum to: Future Circular Collider Feasibility Study Report
- 21 July 2026
- Published by Springer Nature in The European Physical Journal C
- Vol. 86 (7)
Open AccessErratum to: Future Circular Collider Feasibility Study Report
- Top Cited PapersOpen Access
- 24 December 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (12)
Future Circular Collider Feasibility Study Report
Volume 1 of the FCC Feasibility Report presents an overview of the physics case, experimental programme, and detector concepts for the Future Circular Collider (FCC). This volume outlines how FCC would address some of the most profound open questions in particle physics, from precision studies of the Higgs and EW bosons and of the top quark, to the exploration of physics beyond the Standard Model. The report reviews the experimental opportunities offered by the staged implementation of FCC, beginning with an electron-positron collider (FCC-ee), operating at several centre-of-mass energies, followed by a hadron collider (FCC-hh). Benchmark examples are given of the expected physics performance, in terms of precision and sensitivity to new phenomena, of each collider stage. Detector requirements and conceptual designs for FCC-ee experiments are discussed, as are the specific demands that the physics programme imposes on the accelerator in the domains of the calibration of the collision energy, and the interface region between the accelerator and the detector. The report also highlights advances in detector, software and computing technologies, as well as the theoretical tools/reconstruction techniques that will enable the precision measurements and discovery potential of the FCC experimental programme. The content and structure of this report are guided by the scope and priorities defined in the mandate of the FCC Feasibility Study. It is therefore not intended to serve as an exhaustive review of the full physics potential of FCC. Several topics, already covered in earlier reports such as the FCC CDR, are not reiterated here or are addressed only briefly, in alignment with the study’s focus. This volume reflects the outcome of a global collaborative effort involving hundreds of scientists and institutions, aided by a dedicated community-building coordination, and provides a targeted assessment of the scientific opportunities and experimental foundations of the FCC programme.
- 24 December 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (12)
Top Cited PapersOpen AccessFuture Circular Collider Feasibility Study Report
Volume 1 of the FCC Feasibility Report presents an overview of the physics case, experimental programme, and detector concepts for the Future Circular Collider (FCC). This volume outlines how FCC would address some of the most profound open questions in particle physics, from precision studies of the Higgs and EW bosons and of the top quark, to the exploration of physics beyond the Standard Model. The report reviews the experimental opportunities offered by the staged implementation of FCC, beginning with an electron-positron collider (FCC-ee), operating at several centre-of-mass energies, followed by a hadron collider (FCC-hh). Benchmark examples are given of the expected physics performance, in terms of precision and sensitivity to new phenomena, of each collider stage. Detector requirements and conceptual designs for FCC-ee experiments are discussed, as are the specific demands that the physics programme imposes on the accelerator in the domains of the calibration of the collision energy, and the interface region between the accelerator and the detector. The report also highlights advances in detector, software and computing technologies, as well as the theoretical tools/reconstruction techniques that will enable the precision measurements and discovery potential of the FCC experimental programme. The content and structure of this report are guided by the scope and priorities defined in the mandate of the FCC Feasibility Study. It is therefore not intended to serve as an exhaustive review of the full physics potential of FCC. Several topics, already covered in earlier reports such as the FCC CDR, are not reiterated here or are addressed only briefly, in alignment with the study’s focus. This volume reflects the outcome of a global collaborative effort involving hundreds of scientists and institutions, aided by a dedicated community-building coordination, and provides a targeted assessment of the scientific opportunities and experimental foundations of the FCC programme.
- Open Access
- 24 October 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 112 (7)
Computation of FCC-ee sensitivity to heavy new physics with interactions of any flavor structure
We present a tool to compute the sensitivity of the Future Circular Electron-Positron Collider (FCC-ee) to the interactions of new, heavy particles via publicly available extensions to the and computer programs. We parametrize new particles’ effects without any flavor assumptions and take into account the projected experimental and correlated theoretical uncertainties of various electroweak and Higgs observables at the proposed collider. We illustrate a use of the tool by estimating the sensitivity of the FCC-ee to a Z ′ model with flavor-specific couplings, which explains anomalies inferred from present-day measurements and Standard Model predictions of observables that involve the b → s ℓ + ℓ − transition.
- 24 October 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 112 (7)
Open AccessComputation of FCC-ee sensitivity to heavy new physics with interactions of any flavor structure
We present a tool to compute the sensitivity of the Future Circular Electron-Positron Collider (FCC-ee) to the interactions of new, heavy particles via publicly available extensions to the and computer programs. We parametrize new particles’ effects without any flavor assumptions and take into account the projected experimental and correlated theoretical uncertainties of various electroweak and Higgs observables at the proposed collider. We illustrate a use of the tool by estimating the sensitivity of the FCC-ee to a Z ′ model with flavor-specific couplings, which explains anomalies inferred from present-day measurements and Standard Model predictions of observables that involve the b → s ℓ + ℓ − transition.
- Open Access
- 11 October 2025
- Published by Elsevier in Physics Letters B
- Vol. 870
A B − anomaly motivated Z ′ boson at the energy and precision frontiers
- 11 October 2025
- Published by Elsevier in Physics Letters B
- Vol. 870
Open AccessA B − anomaly motivated Z ′ boson at the energy and precision frontiers
- Open Access
- 14 March 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (3) , 1-10
Constraints on the malaphoric $B_3-L_2$ model from di-lepton resonance searches at the LHCWe confront the malaphoric $$B_3-L_2$$ model with bounds coming from a search for resonances in the di-lepton channels at the 13 TeV LHC. In contrast to the original $$B_3-L_2$$ model, the $$Z^\prime $$ of the malaphoric $$B_3-L_2$$ model has sizeable couplings to the lighter two families; these originate from order unity kinetic mixing with the hypercharge gauge boson and ameliorate the fit to lepton flavour universality measurements in B-meson decays. The $$Z^\prime $$ coupling to the first two families of quark means that the resulting constraints from resonant di-lepton searches are stronger. Nevertheless, we find that for $$M_{Z^\prime }>2.8$$ TeV there remains a non-negligible region of allowed parameter space where the model significantly improves upon several Standard Model predictions for observables involving the $$b \rightarrow s l^+ l^-$$ transition. We estimate that the 3000 fb $$^{-1}$$ HL-LHC will extend this sensitivity to $$M_{Z^\prime }= 4.2$$ TeV.- 14 March 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (3) , 1-10
Open AccessConstraints on the malaphoric $B_3-L_2$ model from di-lepton resonance searches at the LHCWe confront the malaphoric $$B_3-L_2$$ model with bounds coming from a search for resonances in the di-lepton channels at the 13 TeV LHC. In contrast to the original $$B_3-L_2$$ model, the $$Z^\prime $$ of the malaphoric $$B_3-L_2$$ model has sizeable couplings to the lighter two families; these originate from order unity kinetic mixing with the hypercharge gauge boson and ameliorate the fit to lepton flavour universality measurements in B-meson decays. The $$Z^\prime $$ coupling to the first two families of quark means that the resulting constraints from resonant di-lepton searches are stronger. Nevertheless, we find that for $$M_{Z^\prime }>2.8$$ TeV there remains a non-negligible region of allowed parameter space where the model significantly improves upon several Standard Model predictions for observables involving the $$b \rightarrow s l^+ l^-$$ transition. We estimate that the 3000 fb $$^{-1}$$ HL-LHC will extend this sensitivity to $$M_{Z^\prime }= 4.2$$ TeV. - Open Access
- 17 February 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (2) , 1-11
Malaphoric $Z^\prime $ models for $b \rightarrow s \ell ^+ \ell ^-$ anomaliesWe study some phenomenological effects of kinetic mixing between the hypercharge field and a new U(1) gauge field in specific $$Z^\prime $$ models that ameliorate the tensions between measurements and Standard Model predictions in $$b \rightarrow s\ell ^+ \ell ^-$$ decays. To this end, we rederive the dimension-6 SMEFT coefficients resulting from integrating out the kinetically-mixed (‘malaphoric’) $$Z^\prime $$ field. The kinetic mixing provides a family-universal component to the couplings of the $$Z^\prime $$ field, which can improve fits to lepton flavour universality observables. We show how kinetic mixing improves the best fit of the $$B_3-L_2$$ model to $$b\rightarrow s$$ data by 7.0 units of $$\chi ^2$$ while remaining compatible with other relevant data sets such as electroweak precision observables and measurements of $$e^+ e^- \rightarrow \ell ^+ \ell ^-$$ at LEP2.- 17 February 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (2) , 1-11
Open AccessMalaphoric $Z^\prime $ models for $b \rightarrow s \ell ^+ \ell ^-$ anomaliesWe study some phenomenological effects of kinetic mixing between the hypercharge field and a new U(1) gauge field in specific $$Z^\prime $$ models that ameliorate the tensions between measurements and Standard Model predictions in $$b \rightarrow s\ell ^+ \ell ^-$$ decays. To this end, we rederive the dimension-6 SMEFT coefficients resulting from integrating out the kinetically-mixed (‘malaphoric’) $$Z^\prime $$ field. The kinetic mixing provides a family-universal component to the couplings of the $$Z^\prime $$ field, which can improve fits to lepton flavour universality observables. We show how kinetic mixing improves the best fit of the $$B_3-L_2$$ model to $$b\rightarrow s$$ data by 7.0 units of $$\chi ^2$$ while remaining compatible with other relevant data sets such as electroweak precision observables and measurements of $$e^+ e^- \rightarrow \ell ^+ \ell ^-$$ at LEP2. - Open AccessConstraints on the malaphoric $B_3-L_2$ model from di-lepton resonance searches at the LHCWe confront the malaphoric $B_3-L_2$ model with bounds coming from a search for resonances in the di-lepton channels at the 13~TeV LHC. In contrast to the original $B_3-L_2$ model, the $Z^\prime$ of the malaphoric $B_3-L_2$ model has sizeable couplings to the lighter two families; these originate from order unity kinetic mixing with the hypercharge gauge boson and ameliorate the fit to lepton flavour universality measurements in $B-$meson decays. The $Z^\prime$ coupling to the first two families of quark means that the resulting constraints from resonant di-lepton searches are stronger. Nevertheless, we find that for $M_{Z^\prime}>2.8$ TeV there remains a non-negligible region of allowed parameter space where the model significantly improves upon several Standard Model predictions for observables involving the $b \rightarrow s l^+ l^-$ transition. We estimate that the 3000 fb$^{-1}$ HL-LHC will extend this sensitivity to $M_{Z^\prime}= 4.2$ TeV.Open AccessConstraints on the malaphoric $B_3-L_2$ model from di-lepton resonance searches at the LHCWe confront the malaphoric $B_3-L_2$ model with bounds coming from a search for resonances in the di-lepton channels at the 13~TeV LHC. In contrast to the original $B_3-L_2$ model, the $Z^\prime$ of the malaphoric $B_3-L_2$ model has sizeable couplings to the lighter two families; these originate from order unity kinetic mixing with the hypercharge gauge boson and ameliorate the fit to lepton flavour universality measurements in $B-$meson decays. The $Z^\prime$ coupling to the first two families of quark means that the resulting constraints from resonant di-lepton searches are stronger. Nevertheless, we find that for $M_{Z^\prime}>2.8$ TeV there remains a non-negligible region of allowed parameter space where the model significantly improves upon several Standard Model predictions for observables involving the $b \rightarrow s l^+ l^-$ transition. We estimate that the 3000 fb$^{-1}$ HL-LHC will extend this sensitivity to $M_{Z^\prime}= 4.2$ TeV.
- Open Access
- 2 October 2024
- Published by Elsevier in Physics Letters B
- Vol. 858
LHC di-lepton searches for Z′ bosons which explain measurements of b → sl+l− transitions
- 2 October 2024
- Published by Elsevier in Physics Letters B
- Vol. 858
Open AccessLHC di-lepton searches for Z′ bosons which explain measurements of b → sl+l− transitions