DOCSLIB.ORG

Split Supersymmetry

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Split Supersymmetry SPLIT SUPERSYMMETRY G.F. Giudice CERN IFAE Catania, 31 marzo 2005 • Motivazioni per Split Supersymmetry • Conseguenze osservative di Split Supersymmetry Arkani-Hamed Dimopoulos hep-th/0405159 Giudice Romanino hep-ph/0406088 Arkani-Hamed Dimopoulos Giudice Romanino hep-ph/0409232 1 Λ Δ μ γ MW << MPl B nuova fisica a ~ TeV mK Je ε bJs γ Problema del sapore B Λ > 10 3−4 TeV K Piccola gerarchia B Λ > 5−10 TeV EW precision data Contact int. at LEP2 Λ Λ ∼ -3 CC << MPl B nuova fisica a 10 eV Gravità modificata a questa scala oppure fallimento del criterio di naturalezza Riconsideriamo il problema della gerarchia: la scala elettrodebole è determinata dalla dinamica o dalla statistica ? 2 Idea del multiverso emerge Landscape delle teorie di stringa: dalla teoria dell’inflazione 10100 vuoti che corrispondono a diverse costanti di accoppiamento Come la vita si è sviluppata su un pianeta con acqua liquida, con massa tale da trattenere l’atmosfera, con campo magnetico tale da proteggere dal vento solare, in un’orbita galattica con limitato impatto di comete, …così il nostro universo si è sviluppato in un vuoto con Λ -3 2 3 CC ~ 10 eV , v ~ 10 GeV Abandon hierarchy problem (speculations on probability distributions of theories) and use only observational hints Gauge-coupling unification: motivated by theory that addresses α fundamental structure of SM and by measurements on i Dark matter: connection between weak scale and new particle masses 0.1 pb Ω h 2 ≈ rel σ v Proposal of SPLIT SUPERSYMMETRY: retain at the weak scale only gauginos, higgsinos and one Higgs boson (squarks, sleptons and ∼ extra Higgs at the scale m) 4 Eliminate : • Excessive flavour and CP violation • Fast dim-5 proton decay • Tight constraints on the Higgs mass Retain : • DM & gauge-coupling unification Gauge-coupling unification as successful (or better) than in ordinary SUSY 5 Not unique solution, however… • Minimality: search for unification with single threshold, only 15 19 fermions in real reps, and 10 GeV < MGUT < 10 GeV B SpS has the minimal field content consistent with gauge- coupling unification and DM • Splitting of GUT irreps: in SpS no need for new split reps either than SM gauge and Higgs • Light particles: R-symmetry protects fermion masses • Existence and stability of DM: R-parity makes χ stable • Instability of coloured particles: coloured particles are necessary, but they decay either by mixing with quarks (FCNC!) or by interactions with scale < 1013 GeV SpS not unique, but it has all the necessary features built in 6 Why Supersymmetry? X = 1+θ 2 m~ 4 * * ~ 2 ~ 2 2 ~ d θ X X Q Q → m = m d θ X W W → M ~ = m ∫ Q ∫ α α g d 4θ X * X H H → B = m~ 2 d 2θ X Q 3 → A = m~ ∫ 1 2 μ ∫ d 4θ X * H H → μ = m~ ∫ 1 2 R - invariant soft terms R - violating soft terms = = (choose R[H1H 2 ] 0 so that (R[X ] 0, R - symmetry d 2θ H H forbidden) broken by F ) ∫ 1 2 X ~ μ • R-symmetry “splits” the spectrum (Mg and mix through renorm.) • R-invariant B dim = 2 R-violating B dim = 3 7 Split Supersymmetry determined by susy-breaking pattern D - breaking Y =1+θ 4m~ 2 d 4θ YQ*Q → m~ 2 = m~ 2 d 4θ YH H → B = m~ 2 ∫ Q ∫ 1 2 μ ~ 2 1 4 m Non renorm. operators d θ YW W → M ~ = ∫ α α g M * M * 1 m~ 2 1 m~ 2 d 4θ YQ3 → A = d 4θ YD2 ()H H → μ = ∫ ∫ 1 2 M * M * M * M * • Analogy: in SM, L not imposed but accidental. mν small, although L-breaking is O(1) in underlying theory μ 2 • In supergravity, not generated at O(MPl) but only O(MS /MPl) μ ~~2 • Here, Mg~ and not generated at O(m) but only O(m /M*) 8 OBSERVATIONAL CONSEQUENCES OF SPLIT SUPERSYMMETRY • Only one Higgs boson with SM properties • With respect to MSSM, larger log corrections to λ=g2 9 Heavy squarks and sleptons suppress flavour & CP violation, dim-5 proton decay New source of flavour-diagonal CP violation remains M ~ ~ g~ ~ ~ g~ ~ ~ L = WW + μ H H + u H *WH + d HWH + h.c. 2 u d 2 u 2 d ()~* ~* μ CP violation in Im gu gd M Effects on SM matter at two loops: EDM 10 Eliminate phases in chargino mass matrix B 2 ~ μν ⎛ M 2M g g ⎞ e ()~ = W u arg det M + Fμν F M + ⎜ ⎟ 32π 2 χ χ ⎜ ~ μ ⎟ ⎝ 2MW gd g ⎠ ~ μν = * mixes with EDM operator O H H H Fμν F d Q m α ⎛ g~ g~ ⎞ Mμ f = − f f Im⎜ u d ⎟log π 3 ⎜ μ ⎟ 2 e 16 ⎝ M ⎠ mH 11 -27 Present limit: de < 1.7 × 10 ecm at 95% CL (DeMille et al.) Future: DeMille et al. (Yale) 10-29 ecm in 3 years and 10-31 ecm in 5 years. Lamoreaux et al. (Los Alamos): 10-31 ecm and eventually 10-35 ecm. Results from Hinds et al. (Sussex) and Semertzidis et al. 5 μ (Brookhaven) plans to improve by 10 sensitivity on EDM 12 GLUINO: decays through intermediate heavy scalars _ q 5 ~ 4 q ⎛ TeV ⎞ ⎛ m ⎞ ~ τ~ ≈ ⎜ ⎟ ⎜ ⎟ 0.4 Gyr g ~ g ⎜ ⎟ 13 q χ ⎝ M~g ⎠ ⎝10 GeV ⎠ CHARGINOS AND • μ not determined by EWSB NEUTRALINOS: • at LHC produced in DY, not in cascades • decay chains with Higgs bosons • couplings violate susy relations 13 DARK MATTER IN SPLIT SUPERSYMMETRY • μ not determined by EWSB With respect to ordinary susy ~ • B only interacts with Higgs-Higgsino 4 χ Ω 2 ≈ μ 2 ()2 + μ 2 2 () • mixed state χ h 0.1 M1 mχ TeV 2 2 • χ Higgsino Ωχ h ≈ 0.09()μ / TeV DM for μ =1.0 −1.2 TeV χ Ω 2 ≈ ()2 = − • Wino χ h 0.02 M 2 / TeV DM for M 2 2.0 2.5 TeV 14 Upper bound on mχ from thermal relic abundance retained also when gravitino decay contributes to DM Spin-independent χ scattering cross section off protons is mediated by Higgs exchange Present: CDMS & EDELWEISS: 10−42−10−41 cm2 Future:CDMS II: 10−44−10−43 cm2; ZEPLIN, XENON, GENIUS: 10−46−10−44 cm2 15 CONCLUSIONS • Failure of naturalness argument for CC casts doubts on the existence of a physical threshold at the weak scale • Split Supersymmetry abandons hierarchy problem, but retains gauge-coupling unification and dark matter • Not unique solution but, under certain assumption, it is the simplest option • Certain patterns of susy breaking automatically lead to the spectrum of Split Supersymmetry • Observational consequences for collider searches, EDM, dark matter and gravitino cosmology 16.
Load more

Recommended publications
  • The Pev-Scale Split Supersymmetry from Higgs Mass and Electroweak Vacuum Stability
    The PeV-Scale Split Supersymmetry from Higgs Mass and Electroweak Vacuum Stability Waqas Ahmed ? 1, Adeel Mansha ? 2, Tianjun Li ? ~ 3, Shabbar Raza ∗ 4, Joydeep Roy ? 5, Fang-Zhou Xu ? 6, ? CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China ~School of Physical Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, P. R. China ∗ Department of Physics, Federal Urdu University of Arts, Science and Technology, Karachi 75300, Pakistan Institute of Modern Physics, Tsinghua University, Beijing 100084, China Abstract The null results of the LHC searches have put strong bounds on new physics scenario such as supersymmetry (SUSY). With the latest values of top quark mass and strong coupling, we study the upper bounds on the sfermion masses in Split-SUSY from the observed Higgs boson mass and electroweak (EW) vacuum stability. To be consistent with the observed Higgs mass, we find that the largest value of supersymmetry breaking 3 1:5 scales MS for tan β = 2 and tan β = 4 are O(10 TeV) and O(10 TeV) respectively, thus putting an upper bound on the sfermion masses around 103 TeV. In addition, the Higgs quartic coupling becomes negative at much lower scale than the Standard Model (SM), and we extract the upper bound of O(104 TeV) on the sfermion masses from EW vacuum stability. Therefore, we obtain the PeV-Scale Split-SUSY. The key point is the extra contributions to the Renormalization Group Equation (RGE) running from arXiv:1901.05278v1 [hep-ph] 16 Jan 2019 the couplings among Higgs boson, Higgsinos, and gauginos.
    [Show full text]
  • Gravity Waves and Proton Decay in a Flipped SU(5) Hybrid Inflation Model
    PHYSICAL REVIEW D 97, 123522 (2018) Gravity waves and proton decay in a flipped SU(5) hybrid inflation model † ‡ Mansoor Ur Rehman,1,* Qaisar Shafi,2, and Umer Zubair2, 1Department of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistan 2Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA (Received 10 April 2018; published 14 June 2018) We revisit supersymmetric hybrid inflation in the context of the flipped SUð5Þ model. With minimal superpotential and minimal Kähler potential, and soft supersymmetry (SUSY) masses of order (1–100) TeV, compatibility with the Planck data yields a symmetry breaking scale M of flipped SUð5Þ close to ð2–4Þ × 1015 GeV. This disagrees with the lower limit M ≳ 7 × 1015 GeV set from proton decay searches by the Super-Kamiokande collaboration. We show how M close to the unification scale 2 × 1016 GeV can be reconciled with SUSY hybrid inflation by employing a nonminimal Kähler potential. Proton decays into eþπ0 with an estimated lifetime of order 1036 years. The tensor to scalar ratio r in this case can approach observable values ∼10−4–10−3. DOI: 10.1103/PhysRevD.97.123522 I. INTRODUCTION flipped SUð5Þ gauge group see [9] where each of two hybrid fields is shown to realize inflation. For no-scale The supersymmetric (SUSY) hybrid inflation model 5 – SUSY flipped SUð Þ models of inflation see [10,11]. [1 5] has attracted a fair amount of attention due to its 5 ≡ 5 1 The flipped SUð Þ SUð Þ × Uð ÞX model [12,13] simplicity and elegance in realizing the grand unified exhibits many remarkable features and constitutes an attrac- theory (GUT) models of inflation [5].
    [Show full text]
  • Grand Unification and Proton Decay
    Grand Unification and Proton Decay Borut Bajc J. Stefan Institute, 1000 Ljubljana, Slovenia 0 Reminder This is written for a series of 4 lectures at ICTP Summer School 2011. The choice of topics and the references are biased. This is not a review on the sub- ject or a correct historical overview. The quotations I mention are incomplete and chosen merely for further reading. There are some good books and reviews on the market. Among others I would mention [1, 2, 3, 4]. 1 Introduction to grand unification Let us first remember some of the shortcomings of the SM: • too many gauge couplings The (MS)SM has 3 gauge interactions described by the corresponding carriers a i Gµ (a = 1 ::: 8) ;Wµ (i = 1 ::: 3) ;Bµ (1) • too many representations It has 5 different matter representations (with a total of 15 Weyl fermions) for each generation Q ; L ; uc ; dc ; ec (2) • too many different Yukawa couplings It has also three types of Ng × Ng (Ng is the number of generations, at the moment believed to be 3) Yukawa matrices 1 c c ∗ c ∗ LY = u YU QH + d YDQH + e YELH + h:c: (3) This notation is highly symbolic. It means actually cT αa b cT αa ∗ cT a ∗ uαkiσ2 (YU )kl Ql abH +dαkiσ2 (YD)kl Ql Ha +ek iσ2 (YE)kl Ll Ha (4) where we denoted by a; b = 1; 2 the SU(2)L indices, by α; β = 1 ::: 3 the SU(3)C indices, by k; l = 1;:::Ng the generation indices, and where iσ2 provides Lorentz invariants between two spinors.
    [Show full text]
  • Arxiv:Hep-Ph/0605144 V1 12 May 2006
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CERN Document Server Triviality and the Supersymmetric See-Saw Bruce A. Campbell1 and David W. Maybury2a 1Department of Physics, Carleton University, 1125 Colonel By Drive, Ottawa ON K1S 5B6, Canada 2Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, United Kingdom For the D = 5 Majorana neutrino mass operator to have a see-saw ultraviolet completion that is viable up to the Planck scale, the see-saw scale is bounded above due to triviality limits on the see-saw couplings. For supersymmetric see-saw models, with realistic neutrino mass textures, we compare constraints on the see-saw scale from triviality bounds, with those arising from experimental limits on induced charged-lepton flavour violation, for both the CMSSM and for models with split supersymmetry. arXiv:hep-ph/0605144 v1 12 May 2006 1 Introduction The recent observations of neutrino flavour oscillations (see 1 for review) provide compelling evidence for neutrino mass. If we consider the standard model as an effective field theory, the requisite neutrino mass terms can in general be introduced without extension of the standard model field content. From the low-energy point of view, neutrino mass terms appear through a non-renormalizable dimension-five operator constructed from standard model fields, i j ν = λijL L HH +h.c. (1) O where i and j refer to generation labels, and λij define arbitrary coefficients with dimensions of 2 2 inverse mass. The experimental lower bound ∆(m ) > 0.0015(eV ) for the oscillation νµ νµ 6→ implies that in a mass-diagonal basis for the neutrinos, and with H = 250/√2, there exists a −15 h −i1 neutrino mass eigenstate for which (diagonal) λ> 1.6 10 (GeV ).
    [Show full text]
  • SUSY, Landscape and the Higgs
    SUSY, Landscape and the Higgs Michael Dine Department of Physics University of California, Santa Cruz Workshop: Nature Guiding Theory, Fermilab 2014 Michael Dine SUSY, Landscape and the Higgs A tension between naturalness and simplicity There have been lots of good arguments to expect that some dramatic new phenomena should appear at the TeV scale to account for electroweak symmetry breaking. But given the exquisite successes of the Model, the simplest possibility has always been the appearance of a single Higgs particle, with a mass not much above the LEP exclusions. In Quantum Field Theory, simple has a precise meaning: a single Higgs doublet is the minimal set of additional (previously unobserved) degrees of freedom which can account for the elementary particle masses. Michael Dine SUSY, Landscape and the Higgs Higgs Discovery; LHC Exclusions So far, simplicity appears to be winning. Single light higgs, with couplings which seem consistent with the minimal Standard Model. Exclusion of a variety of new phenomena; supersymmetry ruled out into the TeV range over much of the parameter space. Tunings at the part in 100 1000 level. − Most other ideas (technicolor, composite Higgs,...) in comparable or more severe trouble. At least an elementary Higgs is an expectation of supersymmetry. But in MSSM, requires a large mass for stops. Michael Dine SUSY, Landscape and the Higgs Top quark/squark loop corrections to observed physical Higgs mass (A 0; tan β > 20) ≈ In MSSM, without additional degrees of freedom: 126 L 124 GeV H h m 122 120 4000 6000 8000 10 000 12 000 14 000 HMSUSYGeVL Michael Dine SUSY, Landscape and the Higgs 6y 2 δm2 = t m~ 2 log(Λ2=m2 ) H −16π2 t susy So if 8 TeV, correction to Higgs mass-squred parameter in effective action easily 1000 times the observed Higgs mass-squared.
    [Show full text]
  • Exploring Supersymmetry and Naturalness in Light of New Experimental Data
    Exploring supersymmetry and naturalness in light of new experimental data by Kevin Earl A thesis submitted to the Faculty of Graduate and Postdoctoral Affairs in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Physics Department of Physics Carleton University Ottawa-Carleton Institute for Physics Ottawa, Canada August 27, 2019 Copyright ⃝c 2019 Kevin Earl Abstract This thesis investigates extensions of the Standard Model (SM) that are based on either supersymmetry or the Twin Higgs model. New experimental data, primar- ily collected at the Large Hadron Collider (LHC), play an important role in these investigations. Specifically, we examine the following five cases. We first consider Mini-Split models of supersymmetry. These types ofmod- els can be generated by both anomaly and gauge mediation and we examine both cases. LHC searches are used to constrain the relevant parameter spaces, and future prospects at LHC 14 and a 100 TeV proton proton collider are investigated. Next, we study a scenario where Higgsino neutralinos and charginos are pair produced at the LHC and promptly decay due to the baryonic R-parity violating superpotential operator λ00U cDcDc. More precisely, we examine this phenomenology 00 in the case of a single non-zero λ3jk coupling. By recasting an experimental search, we derive novel constraints on this scenario. We then introduce an R-symmetric model of supersymmetry where the R- symmetry can be identified with baryon number. This allows the operator λ00U cDcDc in the superpotential without breaking baryon number. However, the R-symmetry will be broken by at least anomaly mediation and this reintroduces baryon number violation.
    [Show full text]
  • Alternatives to Standard Tev-Scale New Physics Scenarios
    Alternatives to standard TeV-scale New Physics scenarios Stéphane Lavignac (IPhT Saclay) • introduction • usual prejudices about New Physics • split supersymmetry and high-scale supersymmetry • minimal scenarios with sterile neutrinos « Le futur de la Physique des Particules » Journée de la Division Particules et Champs de la SFP LPNHE, Paris, 23 janvier 2015 Introduction New Physics expected because the Standard Model is incomplete: Unexplained observational facts: • neutrino masses • dark matter (DM) • matter-antimatter asymmetry (BAU) • inflation somewhat different in nature • cosmological constant } involve also gravity Theoretical problems: • strong CP problem • origin of electroweak symmetry breaking (EWSB) • large number of parameters, mass hierarchies • incomplete unification of forces • hierarchy problem (in the presence of ⇤ NP M W ) The hierarchy problem has often been used as a guide to discriminate among theories beyond the SM, favouring supersymmetry, extra dimensions and composite Higgs models These theories are now strongly challenged by negative search results from colliders and dark matter experiments → emergence of alternative scenarios in which naturalness is no longer required, such as: • split supersymmetry • high-scale supersymmetry • scenarios with superheavy sterile neutrinos (seesaw) • scenarios with keV/GeV sterile neutrinos, such as the νMSM 18 C. Grojean be. The SM particles give unnaturally large corrections to the Higgs mass: they destabilize the Higgs vev and tend to push18 it towards the UV cutoff ofC. the Grojean SM. Some precise adjustment (fine-tuning)18 between the bare massC. Grojeanand the one-loop correction is needed to maintain the vevbe.of the The Higgs SM particles around give the unnaturally weak scale: large take corrections to the Higgs mass: they be.
    [Show full text]
  • Gravity Modifications from Extra Dimensions
    12th Conference on Recent Developments in Gravity (NEB XII) IOP Publishing Journal of Physics: Conference Series 68 (2007) 012013 doi:10.1088/1742-6596/68/1/012013 Gravity modifications from extra dimensions I. Antoniadis1 Department of Physics, CERN - Theory Division 1211 Geneva 23, Switzerland E-mail: [email protected] Abstract. Lowering the string scale in the TeV region provides a theoretical framework for solving the mass hierarchy problem and unifying all interactions. The apparent weakness of gravity can then be accounted by the existence of large internal dimensions, in the submillimeter region, and transverse to a braneworld where our universe must be confined. I review the main properties of this scenario and its implications for observations at both particle colliders, and in non-accelerator gravity experiments. Such effects are for instance the production of Kaluza-Klein resonances, graviton emission in the bulk of extra dimensions, and a radical change of gravitational forces in the submillimeter range. I also discuss the warped case and localization of gravity in the presence of infinite size extra dimensions. 1. Introduction During the last few decades, physics beyond the Standard Model (SM) was guided from the problem of mass hierarchy. This can be formulated as the question of why gravity appears to us so weak compared to the other three known fundamental interactions corresponding to the electromagnetic, weak and strong nuclear forces. Indeed, gravitational interactions are 19 suppressed by a very high energy scale, the Planck mass MP 10 GeV, associated to a −35 ∼ length lP 10 m, where they are expected to become important.
    [Show full text]
  • Searches for Supersymmetry at the Tevatron
    SEARCHES FOR SUPERSYMMETRY AT THE TEVATRON ELSE LYTKEN (for the CDF and DØ collaborations) Department of Physics, Purdue University 525 Northwestern Avenue, West Lafayette, Indiana, USA The results for searches for Supersymmetry at the Tevatron Collider are summarized in this paper. We focus here on searches for chargino/neutralino and the lightest stop, as well as scenarios with R-parity violation and split supersymmetry. No significant excesses with respect to the Standard Model were observed and constraints are set on the SUSY parameter space. 1 Introduction arXiv:hep-ex/0605061v1 15 May 2006 Supersymmetry (SUSY), an attractive extension of the Standard Model (SM), is based on a new symmetry between fermions and bosons. Each Standard Model particle acquires a supersymmet- ric partner with ∆spin = 1/2. Most of the SUSY models considered assume the conservation of a quantum number, R-paritya, resulting in a stable lightest supersymmetric particle, the LSP. This stable, weakly interacting particle would escape detection and give rise to missing transverse energy, ET . In minimal supergravity models the lightest supersymmetric particle 6 0 is usually the lightest neutralino,χ ˜1. The non-excluded masses for the proposed superpartners are typically of the order of 100 GeV/c2 and above, thus potentially accessible at the Tevatron. The two Tevatron experiments, DØ and CDF have successfully been taking data at √s =1.96 TeV. Results shown are based on 300 - 800 pb−1 of data. 2 Squarks and gluinos 2.1 Searching for stop Due to their strong couplings, squarks and gluinos are expected to be produced abundantly at hadron colliders.
    [Show full text]
  • Split Supersymmetry at Colliders
    2005 International Linear Collider Workshop - Stanford, U.S.A. Split Supersymmetry at Colliders W. Kilian Deutsches Elektronen-Synchrotron DESY, D–22603 Hamburg, Germany T. Plehn1 MPI f¨ur Physik, Fohringer¨ Ring 6, D–80805 M¨unchen, Germany P. Richardson Institute for Particle Physics Phenomenology, University of Durham, DH1 3LE, UK E. Schmidt Fachbereich Physik, University of Rostock, D-18051 Rostock, Germany We consider the collider phenomenology of split-supersymmetry models. Despite the challenging nature of the signals in these models the long-lived gluino can be discovered with masses above 2 TeV at the LHC. At a future linear collider we will be able to observe the renormalization group effects from split supersymmetry on the chargino/neutralino mixing parameters, using measurements of the neutralino and chargino masses and cross sections. This indirect determination of chargino/neutralino anomalous Yukawa couplings is an important check for supersymmetric models in general. 1. INTRODUCTION Split supersymmetry [1] is a possibility to evade many of the phenomenological constraints that plague generic supersymmetric extensions of the Standard Model. By splitting the supersymmetry-breaking scale between the scalar and the gaugino sector, the squarks and sleptons are rendered heavy (somewhere between several TeV and the GUT scale), while charginos and neutralinos may still be at the TeV scale or below. This setup eliminates dangerous flavor-changing neutral current transitions, electric dipole moments, and spurious proton-decay operators without the need for mass degeneracy between the sfermion generations. The benefits of the supersymmetry paradigm, in particular the unification of gauge groups at a high scale and the successful dark-matter prediction, are retained.
    [Show full text]
  • Gravitino Dark Matter in Split-SUSY (Pheno Approach) Based on [G
    Gravitino Dark Matter in Split-SUSY (pheno approach) Based on [G. Cottin, M. Díaz, M. J. Guzmán, BP: 1406.2368] Boris Panes University of Sao Paulo, Brazil Manchester - July, 2014 Outlook ➔ General motivation and specific approach ➔ The model: Split-SUSY with BRpV and Gravitino LSP ➔ Known results in Split-SUSY (Higgs mass and Neutrinos) ➔ Gravitino Dark Matter (Relic Density and Life-Time) ➔ Summary BP-USP 2/20 General Motivation Take into account current experimental information from colliders (LHC and CMS), Neutrinos (Oscillation experiments), Cosmology (Dark Matter), etc., in the context of Supersymmetry phenomenology BP-USP 3/20 … in particular SUSY model: Split Supersymmetry with Bilinear R-Parity Violation and Gravitino LSP 3-Flavor global fits: 1405.7540 Higgs mass: 1207.7214 & 1303.4571 Rough estimation of lower Density: 1303.5076 bounds on SUSY spectrum: Life-time lower bounds: 1106.0308 ATLAS and CMS collaborarion BP-USP 4/20 Split-SUSY with BRpV Motivations and original idea in hep-th/0405159 and hep-ph/0406088. In practice, we make use of the freedom that we have to choose the soft parameters. Thus, we play an aggressive game and decouple the scalar sector from the EW scale. - Unification of gauge couplings is hold it - Higgs mass has to be fine-tuned - Neutrino physics is half solved with BRpV M - Above the scale M we have the MSSM again - Matching conditions at M BP-USP 5/20 Free parameters of the model - Gaugino masses and mu parameter: Mino = M1, M2, M3, μ - Split-SUSY scale M and tanβ (gauge and quartic effective couplings) - Reheating Temperature T_R (or mG) - Effective BRpV parameters λ1, λ2, λ3 - Effective mass parameter μ_g * We assume negligible trilinear couplings, A = 0 BP-USP 6/20 Higgs and Neutrinos in Split-SUSY BP-USP 7/20 Higgs mass - Several technical details in hep-th/0405159, 0705.1496, 1211.1000, 1312.5743 - The low energy Higgs potential of Split-SUSY is SM like - In order to compute the Higgs mass we run down the quartic coupling from M to the EW scale by using LL RGEs.
    [Show full text]
  • Particles Meet Cosmology and Strings in Boston
    PASCOS 2004 Particles meet cosmology and strings in Boston PASCOS 2004 is the latest in the symposium series that brings together disciplines from the frontier areas of modern physics. Participants at PASCOS 2004 and the Pran Nath Fest, which were held at Northeastern University, Boston. They include Howard Baer - front row sixth from left - then, moving right, Alfred Bartl, Michael Dine, Bruno Zumino, Pran Nath, Steven Weinberg, Paul Frampton, Mariano Quiros, Richard Arnowitt, MaryKGaillard, Peter Nilles and Michael Vaughn (chair, local organizing committee). The Tenth International Symposium on Particles, Strings and Cos­ redshift surveys suggests that the critical matter density of the uni­ mology took place at Northeastern University, Boston, on 16-22 verse is Qm ~ 0.3, direct dynamical measurements combined with August 2004. Two days of the symposium, 18-19 August, were the estimates of the luminosity density indicate Qm = 0.1-0.2. She devoted to the Pran Nath Fest in celebration of the 65th birthday of suggested that the apparent discrepancy may result from variations Matthews University Distinguished Professor Pran Nath. The PASCOS in the dark-matter fraction with mass and scale. She also suggested symposium is the largest interdisciplinary gathering on the interface that gravitational lensing maps combined with large redshift sur­ of the three disciplines of cosmology, particle physics and string veys promise to measure the dark-matter distribution in the uni­ theory, which have become increasingly entwined in recent years. verse. The microwave background can also provide clues to inflation Topics at PASCOS 2004 included the large-scale structure of the in the early universe.
    [Show full text]