Minimal model program mori theory, extremal rays

Results 21 to 30 of about 1,099 (99)

Test of the universality of τ and μ lepton couplings in W-boson decays with the ATLAS detector [PDF]

Nature Physics, 2020
The standard model of particle physics encapsulates our best current understanding of physics at the smallest scales. A fundamental axiom of this theory is the universality of the couplings of the different generations of leptons to the electroweak gauge
G. Aad +499 more
semanticscholar +1 more source

Local Fano-Mori contractions of high nef-value [PDF]

, 2014
Let $X$ be a variety with at most terminal $\mathbb Q$-factorial singularities of dimension $n$. We study local contractions $f:X\to Z$ supported by a $\mathbb Q$-Cartier divisor of the type $K_X+ \tau L$, where $L$ is an $f$-ample Cartier divisor and ...
M. Andreatta, L. Tasin
semanticscholar +1 more source

Minimal model theory for relatively trivial log canonical pairs [PDF]

, 2017
We study relative log canonical pairs with relatively trivial log canonical divisors. We fix such a pair $(X,\Delta)/Z$ and establish the minimal model theory for the pair $(X,\Delta)$ assuming the minimal model theory for all Kawamata log terminal pairs
Hashizume, Kenta
core +3 more sources

On existence of log minimal models

, 2009
In this paper, we prove that the log minimal model program in dimension $d-1$ implies the existence of log minimal models for effective lc pairs (eg of nonnegative Kodaira dimension) in dimension $d$.
Caucher Birkar +7 more
core +1 more source

Divisors on elliptic Calabi-Yau 4-folds and the superpotential in F-theory, I

, 1998
Each smooth elliptic Calabi-Yau 4-fold determines both a three-dimensional physical theory (a compactification of ``M-theory'') and a four-dimensional physical theory (using the ``F-theory'' construction).
Grassi, A.
core +3 more sources

Existence of minimal models for varieties of log general type [PDF]

, 2008
We prove that the canonical ring of a smooth projective variety is finitely ...
Birkar, Caucher +3 more
core +4 more sources

Arc spaces, motivic integration and stringy invariants [PDF]

, 2004
The concept of motivic integration was invented by Kontsevich to show that birationally equivalent Calabi-Yau manifolds have the same Hodge numbers. He constructed a certain measure on the arc space of an algebraic variety, the motivic measure, with the ...
W. Veys
semanticscholar +1 more source

Long-lived particles at the energy frontier: the MATHUSLA physics case [PDF]

Reports on progress in physics. Physical Society, 2018
We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a comprehensive survey of standard model (SM) extensions. LLPs are a common prediction of a wide range of theories that address unsolved fundamental mysteries such
D. Curtin +87 more
semanticscholar +1 more source

Fano-Mori contractions of high length on projective varieties with terminal singularities

, 2013
Let X be a projective variety with terminal singularities and let L be an ample Cartier divisor on X. We prove that if f is a birational contraction associated to an extremal ray $ R \subset \bar {NE(X)}$ such that R.(K_X+(n-2)L)
Andreatta, Marco, Tasin, Luca
core +1 more source

On base point free theorem and Mori dream spaces for log canonical threefolds over the algebraic closure of a finite field

, 2016
The authors and D. Martinelli proved the base point free theorem for big line bundles on a three-dimensional log canonical projective pair defined over the algebraic closure of a finite field.
Nakamura, Yusuke, Witaszek, Jakub
core +1 more source

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