Browsing Department of Materials Science and Metallurgy by Author "Allanach, Benjamin Christopher"
Now showing items 1-17 of 17
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Anatomy of the ATLAS diboson anomaly
Allanach, Benjamin Christopher; Gripaios, Ben Matthew; Sutherland, Dave (2015-08-19)We perform a general analysis of new physics interpretations of the recent ATLAS diboson excesses over Standard Model expectations in LHC Run I collisions. Firstly, we estimate a likelihood function in terms of the truth ...
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ATLAS diboson excess could be an R-parity violating dismuon excess
Allanach, Benjamin Christopher; Dev, PS Bhupal; Sakurai, Kazuki (American Physical SocietyPhysical Review D, 2016-02-09)We propose a new possible explanation of the ATLAS diboson excess: that it is due to heavy resonant slepton production, followed by decay into dismuons. The smuon has a mass not too far from the W and Z masses, and so it ...
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Consistency of the recent ATLAS Z+E_T^miss excess in a simplified general gauge mediation model
Allanach, Benjamin Christopher; Raklev, Are; Kvellestad, Anders (APSPhysical Review D, 2015-05-20)ATLAS recently reported a 3σ excess in a leptonic-Z+E_T^miss channel. This was interpreted in the literature in a simplified general gauge mediation model containing a gluino, a Higgsino next-to-lightest supersymmetric ...
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Explaining the CMS eejj Excess With R−parity Violating Supersymmetry and Implications for Neutrinoless Double Beta Decay
Allanach, Benjamin Christopher; Biswas, Sanjoy; Mondal, Subhadeep; Mitra, Manimala (American Physical SocietyPhysical Review D, 2015-01-28)The recent CMS searches for the right handed gauge boson WR reports an interesting deviation from the Standard Model. The search has been conducted in the eejj channel and has shown an excess around meejj ~ 2 TeV. In this ...
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Gauge Mediation in the NMSSM with a Light Singlet: Sparticles within the Reach of LHC Run II
Allanach, Benjamin Christopher; Badziak, Marcin; Hugonie, Cyril; Ziegler, RobertRelatively light stops in gauge mediation models are usually made compatible with the Higgs mass of 125 GeV by introducing direct Higgs-messenger couplings. We show that such couplings are not necessary in a simple and ...
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Higher order corrections and unification in the minimal supersymmetric standard model: SOFTSUSY3.5
Allanach, Benjamin Christopher; Bednyakov, A; Ruiz, de Austri R (ElsevierComputer Physics Communications, 2014-12-18)We explore the effects of three-loop minimal supersymmetric standard model renormalisation group equation terms and some leading two-loop threshold corrections on gauge and Yukawa unification: each being one loop higher ...
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Interpreting a CMS excess in lljj+missing-transverse-momentum with the golden cascade of the minimal supersymmetric standard model
Allanach, Benjamin Christopher; Kvellestad, Anders; Raklev, Are (American Physical SocietyPhysical Review D, 2015-06-29)The CMS experiment recently reported an excess consistent with an invariant mass edge in opposite-sign same flavor (OSSF) leptons, when produced in conjunction with at least two jets and missing transverse momentum. We ...
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Interpreting the CMS ℓ+ ℓ-jj+ missing transverse energy excess with a leptoquark model
Allanach, Benjamin Christopher; Alves, A; Queiroz, FS; Sinha, K; Strumia, A (Physical Review D - Particles, Fields, Gravitation and Cosmology, 2015-09-17)
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Light Sparticles from a Light Singlet in Gauge Mediation
Allanach, Benjamin Christopher; Badziak, Marcin; Hugonie, Cyril; Ziegler, Robert (APSPhysics Review D, 2015-07-10)We revisit a simple model that combines minimal gauge mediation and the next-to-minimal supersymmetric standard model. We show that one can obtain a 125 GeV Standard Model-likeHiggs boson with stops as light as 1.1 TeV, ...
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Multiple solutions in supersymmetry and the Higgs
Allanach, Benjamin Christopher (The Royal Society PublishingPhilosophical Transactions of the Royal Society A, 2014-11-24)Weak-scale supersymmetry is a well-motivated, if speculative, theory beyond the Standard Model of particle physics. It solves the thorny issue of the Higgs mass, namely: how can it be stable to quantum corrections, when ...
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R-Parity Violation in a Warped GUT Scale Randall-Sundrum Framework
Allanach, Benjamin Christopher; Iyer, AM; Sridhar, K (American Physical SocietyPhysical Review D, 2016)We consider a modified Randall-Sundrum (RS) framework between the Planck scale and the GUT scale. In this scenario, RS works as a theory of flavour and not as a solution to the hierarchy problem. The latter is resolved by ...
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Resonant slepton production yields CMS eejj and epTjj excesses
Allanach, Benjamin Christopher; Biswas, Sanjoy; Mondal, Subhadeep; Mitra, Manimala (APS, 2015-01-13)Recent CMS searches for dileptoquark production report local excesses of 2.4σ in an eejj channel and 2.6σ in an epTjj channel. Here, we simultaneously explain both excesses with resonant slepton production in R-parity ...
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The calculation of sparticle and Higgs decays in the minimal and next-to-minimal supersymmetric standard models: SOFTSUSY4.0
Allanach, Benjamin Christopher; Cridge, T (ElsevierComputer Physics Communications, 2017-11-01)We describe a major extension of the SOFTSUSY spectrum calculator to include the calculation of the decays, branching ratios and lifetimes of sparticles into lighter sparticles, covering the next-to-minimal supersymmetric ...
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The inclusion of two-loop SUSYQCD corrections to gluino and squark pole masses in the minimal and next-to-minimal supersymmetric standard model: SOFTSUSY3.7
Allanach, Benjamin Christopher; Martin, SP; Robertson, DG; Ruiz de Austri, R (ElsevierComputer Physics Communications, 2017-10)We describe an extension of the SOFTSUSY spectrum calculator to include two-loop supersymmetric QCD (SUSYQCD) corrections of order O(α s 2 ) to gluino and squark pole masses, either in the minimal supersymmetric standard ...
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The quasi-fixed Minimal Supersymmetric Standard Model
Abel, SA; Allanach, Benjamin Christopher (Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1997-12-25)
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Towards the european strategy for particle physics: The briefing book
Åkesson, T; Aleksan, R; Allanach, Benjamin Christopher; Bertolucci, S; Blondel, A; Butterworth, J; Cavalli-Sforza, M; Cervera, A; De Naurois, M; Desch, K; Egede, U; Heuer, R; Hoecker, A; Huber, P; Jungmann, K; Linde, F; Lombardi, A; Mangano, M; Mezzetto, M; Onderwater, G; Palanque-Delabrouille, N; Peach, K; Polosa, A; Rondio, E; Webber, B; Weiglein, G; Womersley, J (European Physical Journal C, 2007-07-01)
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Z′ models for the LHCb and g-2 muon anomalies
Allanach, Benjamin Christopher; Queiroz, FS; Strumia, A; Sun, S (Physical Review D, 2016-03-29)