Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Nicholas Geiser"'
Autor:
Nicholas Geiser
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-40 (2024)
Abstract We study the N-point Coon amplitude discovered first by Baker and Coon in the 1970s and then again independently by Romans in the 1980s. This Baker-Coon-Romans (BCR) amplitude retains several properties of tree-level string amplitudes, namel
Externí odkaz:
https://doaj.org/article/a8ea54a00aba4e918a68773f929517e4
Autor:
Nicholas Geiser, Lukas W. Lindwasser
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 4, Pp 1-29 (2023)
Abstract We analyze so-called generalized Veneziano and generalized Virasoro amplitudes. Under some physical assumptions, we find that their spectra must satisfy an over-determined set of non-linear recursion relations. The recursion relation for the
Externí odkaz:
https://doaj.org/article/6e1c359371404b9eb99ed970ea1a6470
Autor:
Nicholas Geiser, Lukas W. Lindwasser
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 12, Pp 1-23 (2022)
Abstract We detail the properties of the Veneziano, Virasoro, and Coon amplitudes. These tree-level four-point scattering amplitudes may be written as infinite products with an infinite sequence of simple poles. Our approach for the Coon amplitude us
Externí odkaz:
https://doaj.org/article/a33699c923ac44c28e2d759409542a0a
Autor:
Eric D’Hoker, Nicholas Geiser
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-97 (2022)
Abstract Modular graph functions (MGFs) are SL(2, ℤ)-invariant functions on the Poincaré upper half-plane associated with Feynman graphs of a conformal scalar field on a torus. The low-energy expansion of genus-one superstring amplitudes involves
Externí odkaz:
https://doaj.org/article/68514933a9b5426683269c9781924692
Autor:
Nicholas Geiser
Publikováno v:
Environmental Ethics. 43:195-217
Three recent developments in environmental ethics—interest in virtue and character, concern for psychological realism, and collective action required to address global ecological challenges—are in tension with one another. For example, virtue eth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3deeee1a576a3437a21e94ded98388bc
https://doi.org/10.5840/enviroethics20215421
https://doi.org/10.5840/enviroethics20215421
Autor:
Nicholas Geiser, Lukas W. Lindwasser
Publikováno v:
INSPIRE-HEP
Journal of High Energy Physics
Journal of High Energy Physics
We analyze so-called generalized Veneziano and generalized Virasoro amplitudes. Under some physical assumptions, we find that their spectra must satisfy an over-determined set of non-linear recursion relations. The recursion relation for the generali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e603829a59167bd0e7f19c84fa8077e
Autor:
Eric D’Hoker, Nicholas Geiser
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-97 (2022)
Journal of High Energy Physics
Journal of High Energy Physics
Modular graph functions (MGFs) are $\mathrm{SL}(2,\mathbb{Z})$-invariant functions on the Poincar\'e upper half-plane associated with Feynman graphs of a conformal scalar field on a torus. The low-energy expansion of genus-one superstring amplitudes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1690bb4f0f013c39d3b7da9935ec286
Autor:
Nicholas Geiser, Lukas W. Lindwasser
Publikováno v:
INSPIRE-HEP
Journal of High Energy Physics
Journal of High Energy Physics
We detail the properties of the Veneziano, Virasoro, and Coon amplitudes. These tree-level four-point scattering amplitudes may be written as infinite products with an infinite sequence of simple poles. Our approach for the Coon amplitude uses the ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2805252135eb79a863980a5b9ea17da
http://inspirehep.net/record/2117023
http://inspirehep.net/record/2117023