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While LHC has discovered a very Standard Model-like Higgs boson of mass m_h~ 125 GeV, no solid signal for physics beyond the Standard Model has emerged so far at LHC or at WIMP seach experiments. For the case of weak scale supersymmetry…

High Energy Physics - Phenomenology · Physics 2020-12-30 Howard Baer , Vernon Barger , Shadman Salam , Dibyashree Sengupta , Kuver Sinha

Weak scale supersymmetry (SUSY) is highly motivated in that it provides a 't Hooft technically natural solution to the gauge hierarchy problem. However, recent strong limits from superparticle searches at LHC Run 2 may exacerbate a…

High Energy Physics - Phenomenology · Physics 2025-02-18 Howard Baer , Vernon Barger , Jessica Bolich , Juhi Dutta , Dakotah Martinez , Shadman Salam , Dibyashree Sengupta , Kairui Zhang

Predictions for the scale of SUSY breaking from the string landscape go back at least a decade to the work of Denef and Douglas on the statistics of flux vacua. The assumption that an assortment of SUSY breaking F and D terms are present in…

High Energy Physics - Phenomenology · Physics 2018-04-04 Howard Baer , Vernon Barger , Hasan Serce , Kuver Sinha

Perturbative supersymmetry breaking on the landscape of string vacua is expected to favor large soft terms as a power-law or log distribution, but tempered by an anthropic veto of inappropriate vacua or vacua leading to too large a value…

High Energy Physics - Phenomenology · Physics 2022-01-05 Howard Baer , Vernon Barger , Shadman Salam , Hasan Serce

We examine several issues pertaining to statistical predictivity of the string theory landscape for weak scale supersymmetry (SUSY). We work within a predictive landscape wherein super-renormalizable terms scan while renormalizable terms do…

High Energy Physics - Phenomenology · Physics 2020-10-21 Howard Baer , Vernon Barger , Shadman Salam , Dibyashree Sengupta

In this mini-review, we summarize a variety of findings pertaining to consequences of the landscape of string theory for supersymmetry (SUSY) phenomenology. The idea is to adopt the MSSM as the most parsimonious 4-d low energy EFT after…

High Energy Physics - Phenomenology · Physics 2022-03-01 Howard Baer , Vernon Barger , Shadman Salam , Dibyashree Sengupta

Superstring flux compactifications can stabilize all moduli while leading to an enormous number of vacua solutions, each leading to different $4-d$ laws of physics. While the string landscape provides at present the only plausible…

High Energy Physics - Phenomenology · Physics 2024-02-29 Howard Baer , Vernon Barger , Dakotah Martinez , Shadman Salam

Weak-scale supersymmetry (SUSY) is well motivated as a technically natural solution to the gauge hierarchy problem. LHC limits on superpartners, however, have sharpened the Little Hierarchy problem, raising the question of why $m_{weak} \ll…

High Energy Physics - Phenomenology · Physics 2026-01-06 Kairui Zhang

In supersymmetric models where the superpotential mu term is generated with mu<< m_{soft} (e.g. from radiative Peccei-Quinn symmetry breaking or compactified string models with sequestration and stabilized moduli), and where the string…

High Energy Physics - Phenomenology · Physics 2016-06-22 Howard Baer , Vernon Barger , Michael Savoy , Hasan Serce

In a fertile patch of the string landscape which includes the Minimal Supersymmetric Standard Model (MSSM) as the low energy effective theory, rather general arguments from Douglas suggest a power-law statistical selection of soft breaking…

High Energy Physics - Phenomenology · Physics 2019-12-25 Howard Baer , Vernon Barger , Dibyashree Sengupta

Natural supersymmetry with light higgsinos is most likely to emerge from the string landscape since the volume of scan parameter space shrinks to tiny volumes for electroweak unnatural models. Rather general arguments favor a landscape…

High Energy Physics - Phenomenology · Physics 2024-08-06 Howard Baer , Vernon Barger , Kairui Zhang

A new theory of WIMP Dark Matter has been proposed, motivated directly by striking Data from the PAMELA and ATIC collaborations. The WIMP is taken to be charged under a hidden gauge symmetry G_Dark, broken near the GeV scale; this also…

High Energy Physics - Phenomenology · Physics 2010-04-30 Nima Arkani-Hamed , Neal Weiner

At present, the Standard Model (SM) agrees with almost all collider data. Yet, three finetuning issues -- the Higgs mass problem, the strong CP problem and the cosmological constant problem -- all call for new physics. The most plausible…

High Energy Physics - Phenomenology · Physics 2024-05-03 Howard Baer

Recent work on calculating string theory landscape statistical predictions for the Higgs and sparticle mass spectrum from an assumed power-law soft term distribution yields an expectation for m(h)~ 125 GeV with sparticles (save light…

High Energy Physics - Phenomenology · Physics 2021-03-03 Howard Baer , Vernon Barger , Shadman Salam , Dibyashree Sengupta

We update and extend to larger masses our previous analysis of the MSSM with minimal $SO_{10}$ [MSO$_{10}$SM] soft SUSY breaking boundary conditions. We find a well--defined, narrow region of parameter space which provides the observed…

High Energy Physics - Phenomenology · Physics 2011-08-23 R. Dermisek , S. Raby , L. Roszkowski , R. Ruiz de Austri

In string theory with flux compactifications, anthropic selection for structure formation from a discretuum of vacuum energy values provides at present our only understanding of the tiny yet positive value of the cosmological constant. We…

High Energy Physics - Phenomenology · Physics 2022-06-14 Howard Baer , Vernon Barger , Dakotah Martinez , Shadman Salam

In the post-LHC8 era, it is perceived that what is left of SUSY model parameter space is highly finetuned in the EW sector (EWFT). We discuss how conventional measures overestimate EWFT in SUSY theory. Radiatively-driven natural SUSY (RNS)…

High Energy Physics - Phenomenology · Physics 2015-06-17 Howard Baer

The notion of stringy naturalness-- that an observable O_2 is more natural than O_1 if more (phenomenologically acceptable) vacua solutions lead to O_2 rather than O_1-- is examined within the context of the Standard Model (SM) and various…

High Energy Physics - Phenomenology · Physics 2020-07-22 Howard Baer , Vernon Barger , Shadman Salam

Rather general considerations of the string theory landscape imply a mild statistical draw towards large soft SUSY breaking terms tempered by the requirement of proper electroweak symmetry breaking where SUSY contributions to the weak scale…

High Energy Physics - Phenomenology · Physics 2020-01-08 Howard Baer , Vernon Barger , Dibyashree Sengupta , Hasan Serce , Kuver Sinha , Robert Wiley Deal

Supersymmetric models with low electroweak finetuning are expected to be more prevalent on the string landscape than finetuned models. We assume a fertile patch of landscape vacua containing the minimal supersymmetric standard model (MSSM)…

High Energy Physics - Phenomenology · Physics 2023-07-18 Howard Baer , Vernon Barger , Juhi Dutta , Dibyashree Sengupta , Kairui Zhang
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