scholarly journals Probing neutrino oscillations in supersymmetric models at the Large Hadron Collider

2010 ◽  
Vol 82 (7) ◽  
Author(s):  
F. de Campos ◽  
O. J. P. Éboli ◽  
M. Hirsch ◽  
M. B. Magro ◽  
W. Porod ◽  
...  
Keyword(s):  
Large Hadron Collider ◽  
Neutrino Oscillations ◽  
Hadron Collider ◽  
Supersymmetric Models

scholarly journals Exploring color-octet scalar parameter space in minimal R-symmetric models

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Linda M. Carpenter ◽  
Taylor Murphy ◽  
Matthew J. Smylie
Keyword(s):  
Large Hadron Collider ◽  
Parameter Space ◽  
Branching Fractions ◽  
Hadron Collider ◽  
Collider Phenomenology ◽  
Decay Channels ◽  
Color Octet ◽  
Supersymmetric Models ◽  
Three Body ◽  
Displaced Vertex

Abstract In this work we study the collider phenomenology of color-octet scalars (sgluons) in minimal supersymmetric models endowed with a global continuous R symmetry. We systematically catalog the significant decay channels of scalar and pseudoscalar sgluons and identify novel features that are natural in these models. These include decays in nonstandard diboson channels, such as to a gluon and a photon; three-body decays with considerable branching fractions; and long-lived particles with displaced vertex signatures. We also discuss the single and pair production of these particles and show that they can evade existing constraints from the Large Hadron Collider, to varying extents, in large regions of reasonable parameter space. We find, for instance, that a 725 GeV scalar and a 350 GeV or lighter pseudoscalar can still be accommodated in realistic scenarios.

scholarly journals Measuring the heavy neutrino oscillations in rare W boson decays at the Large Hadron Collider

2019 ◽  
Vol 47 (1) ◽  
pp. 015001 ◽  
Author(s):  
Gorazd Cvetič ◽  
Arindam Das ◽  
Sebastian Tapia ◽  
Jilberto Zamora-Saá
Keyword(s):  
Large Hadron Collider ◽  
W Boson ◽  
Neutrino Oscillations ◽  
Hadron Collider ◽  
Heavy Neutrino

scholarly journals TEV NEUTRINO PHYSICS AT THE LARGE HADRON COLLIDER

2009 ◽  
Vol 24 (18n19) ◽  
pp. 3286-3296 ◽  
Author(s):  
ZHI-ZHONG XING
Keyword(s):  
Neutrino Physics ◽  
Large Hadron Collider ◽  
Particle Physics ◽  
Degrees Of Freedom ◽  
Neutrino Oscillations ◽  
Hadron Collider ◽  
Higgs Bosons ◽  
Type I ◽  
Seesaw Mechanism ◽  
Majorana Neutrinos

I argue that TeV neutrino physics might become an exciting frontier of particle physics in the era of the Large Hadron Collider (LHC). The origin of non-zero but tiny masses of three known neutrinos is probably related to the existence of some heavy degrees of freedom, such as heavy Majorana neutrinos or heavy Higgs bosons, via a TeV-scale seesaw mechanism. I take a few examples to illustrate how to get a balance between theoretical naturalness and experimental testability of TeV seesaws. Besides possible collider signatures at the LHC, new and non-unitary CP-violating effects are also expected to show up in neutrino oscillations for type-I, type-(I+II) and type-III seesaws at the TeV scale.

scholarly journals MASSIVE METASTABLE CHARGED (S)PARTICLES AT THE LHC

2009 ◽  
Vol 24 (25) ◽  
pp. 1955-1969 ◽  
Author(s):  
ARE R. RAKLEV
Keyword(s):  
Charged Particle ◽  
Large Hadron Collider ◽  
Hadron Collider ◽  
Recent Interest ◽  
Supersymmetric Models ◽  
Review Current

This brief review deals with recent interest in the prospects of observing a Massive Metastable Charged Particle (MMCP) at the Large Hadron Collider (LHC), and measuring its properties there. We discuss the motivation for scenarios with MMCPs in a phenomenological context, focusing on supersymmetric models that allow us to explore the expected experimental signatures of MMCPs at the LHC. We review current bounds and give estimates of the LHC reach in terms of MMCP masses.

scholarly journals Color-octet scalars in Dirac gaugino models with broken R symmetry

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Linda M. Carpenter ◽  
Taylor Murphy
Keyword(s):  
Large Hadron Collider ◽  
Symmetry Breaking ◽  
Supersymmetry Breaking ◽  
Cross Sections ◽  
Hadron Collider ◽  
Scalar Particle ◽  
Decay Rates ◽  
Collider Phenomenology ◽  
Color Octet ◽  
Supersymmetric Models

Abstract In this work we study the collider phenomenology of color-octet scalars (sgluons) in supersymmetric models with Dirac gaugino masses that feature an explicitly broken R symmetry (R-broken models). We construct such models by augmenting minimal R-symmetric models with a fairly general set of supersymmetric and softly supersymmetry-breaking operators that explicitly break R symmetry. We then compute the rates of all significant two-body decays and highlight new features that appear as a result of R symmetry breaking, including enhancements to extant decay rates, novel tree- and loop-level decays, and improved cross sections of single sgluon production. We demonstrate in some detail how the familiar results from minimal R-symmetric models can be obtained by restoring R symmetry. In parallel to this discussion, we explore constraints on these models from the Large Hadron Collider. We find that, in general, R symmetry breaking quantitatively affects existing limits on color-octet scalars, perhaps closing loopholes for light CP-odd (pseudoscalar) sgluons while opening one for a light CP-even (scalar) particle. Qualitatively, however, we find that — much as for minimal R-symmetric models, despite stark differences in phenomenology — scenarios with broken R symmetry and two sgluons below the TeV scale can be accommodated by existing searches.

scholarly journals Chargino and neutralino production at the Large Hadron Collider in left-right supersymmetric models

2013 ◽  
Vol 2013 (10) ◽  
Author(s):  
Adam Alloul ◽  
Mariana Frank ◽  
Benjamin Fuks ◽  
Michel Rausch de Traubenberg
Keyword(s):  
Large Hadron Collider ◽  
Hadron Collider ◽  
Supersymmetric Models

scholarly journals Effect of crab cavity high order modes on the coupled-bunch stability of High-Luminosity Large Hadron Collider

2019 ◽  
Vol 22 (5) ◽  
Author(s):  
S. A. Antipov ◽  
N. Biancacci ◽  
J. Komppula ◽  
E. Métral ◽  
B. Salvant ◽  
...  
Keyword(s):  
Large Hadron Collider ◽  
Hadron Collider ◽  
High Order ◽  
High Luminosity
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