Results 51 to 60 of about 102,482 (316)

Asymmetric orbifolds and grand unification [PDF]

open access: yesPhysical Review D, 1996
We generalize the rules for the free fermionic string construction to include other asymmetric orbifolds with world-sheet bosons. We use these rules to construct various grand unified string models that involve level-3 current algebras. We present the explicit construction of three classes of 3-chiral-family grand unified models in the heterotic string
Kakushadze, Zurab, Tye, Henry
openaire   +4 more sources

Hypercharge and baryon minus lepton number in E6

open access: yes, 2003
We study assignments of the hypercharge and baryon minus lepton number for particles in the $E_6$ grand unification model. It is shown that there are three assignments of hypercharge and three assignments of baryon minus lepton number which are ...
D. Emmanuel-Costa   +14 more
core   +1 more source

Quark mixings as a test of a new symmetry of quark Yukawa couplings [PDF]

open access: yes, 1997
Based on the hierarchy exhibited by quarks masses at low energies, we assume that Yukawa couplings of up and down quarks are related by $Y_u\propto Y_d^2$ at grand unification scales.
Aguilar-Saavedra   +8 more
core   +3 more sources

Function‐driven design of a surrogate interleukin‐2 receptor ligand

open access: yesFEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang   +9 more
wiley   +1 more source

Weinberg angle without grand unification [PDF]

open access: yesPhysical Review D, 1993
We assume that strong and electroweak interactions become strong at very high energies. With this assumption, we compute the low-energy gauge coupling constants $ _i (m_Z)$ as a function of the cutoff scale, taking the supersymmetric standard model with $3+2n$ families of quark and lepton multiplets.
Moroi, T.   +2 more
openaire   +3 more sources

Non-Canonical Gauge Coupling Unification in High-Scale Supersymmetry Breaking

open access: yes, 2005
The string landscape suggests that the supersymmetry breaking scale can be high, and then the simplest low energy effective theory is the Standard Model (SM).
Allahverdi   +136 more
core   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

open access: yesFEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo   +2 more
wiley   +1 more source

Seeing higher-dimensional grand unification in primordial non-gaussianities

open access: yesJournal of High Energy Physics, 2019
The observed low-energy values of the SU(3) × SU(2) × U(1) gauge couplings, extrapolated via the minimal Standard Model Renormalization Group evolution, hint at the exciting possibility of a Grand Unified Theory (GUT) at M U ∼ 1014 GeV — a scale, however,
Soubhik Kumar, Raman Sundrum
doaj   +1 more source

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