Published September 1, 2019
| Version v1
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A link that matters: towards phenomenological tests of unimodular asymptotic safety
- 1. Centro Brasileiro de Pesquisas Físicas
- 2. Heidelberg Institute for Theoretical Studies
- 3. Heidelberg University
Description
A bstract Constraining quantum gravity from observations is a challenge. We expand on the idea that the interplay of quantum gravity with matter could be key to meeting this challenge. Thus, we set out to confront different potential candidates for quantum gravity — unimodular asymptotic safety, Weyl-squared gravity and asymptotically safe gravity — with constraints arising from demanding an ultraviolet complete Standard Model. Specifically, we show that within approximations, demanding that quantum gravity solves the Landau-pole problems in Abelian gauge couplings and Yukawa couplings strongly constrains the viable gravitational parameter space. In the case of Weyl-squared gravity with a dimensionless gravitational coupling, we also investigate whether the gravitational contribution to beta functions in the matter sector calculated from functional Renormalization Group techniques is universal, by studying the dependence on the regulator, metric field parameterization and choice of gauge.
Translated Descriptions
⚠️
This is an automatic machine translation with an accuracy of 90-95%
Translated Description (Arabic)
يمثل تقييد الجاذبية الكمية من الملاحظات تحديًا. نتوسع في فكرة أن تفاعل الجاذبية الكمية مع المادة يمكن أن يكون مفتاحًا لمواجهة هذا التحدي. وهكذا، شرعنا في مواجهة المرشحين المحتملين المختلفين للجاذبية الكمومية — السلامة المقاربة أحادية النسق، والجاذبية التربيعية Weyl والجاذبية الآمنة تقاربيًا — مع القيود الناشئة عن المطالبة بنموذج قياسي كامل للأشعة فوق البنفسجية. على وجه التحديد، نظهر أنه ضمن التقريبات، فإن المطالبة بأن تحل الجاذبية الكمية مشاكل قطب لانداو في قارنات قياس أبليان وقارنات يوكاوا تقيد بشدة مساحة معلمة الجاذبية القابلة للتطبيق. في حالة الجاذبية التربيعية Weyl مع اقتران جاذبية لا بعدي، فإننا نتحقق أيضًا مما إذا كانت مساهمة الجاذبية في وظائف بيتا في قطاع المادة المحسوبة من تقنيات مجموعة إعادة التطبيع الوظيفية عالمية، من خلال دراسة الاعتماد على المنظم، وتحديد معلمات المجال المتري واختيار المقياس.Translated Description (French)
A bstract Contraindre la gravité quantique à partir des observations est un défi. Nous développons l'idée que l'interaction de la gravité quantique avec la matière pourrait être la clé pour relever ce défi. Ainsi, nous avons entrepris de confronter différents candidats potentiels à la gravité quantique — la sécurité asymptotique unimodulaire, la gravité au carré de Weyl et la gravité asymptotiquement sûre — avec des contraintes découlant de l'exigence d'un modèle standard complet aux ultraviolets. Plus précisément, nous montrons que dans les approximations, exiger que la gravité quantique résolve les problèmes de Landau-pôle dans les couplages de jauge abéliens et les couplages de Yukawa contraint fortement l'espace des paramètres gravitationnels viables. Dans le cas de la gravité au carré de Weyl avec un couplage gravitationnel sans dimension, nous étudions également si la contribution gravitationnelle aux fonctions bêta dans le secteur de la matière calculée à partir des techniques du groupe de renormalisation fonctionnelle est universelle, en étudiant la dépendance au régulateur, le paramétrage du champ métrique et le choix de la jauge.Translated Description (Spanish)
A bstract Restringir la gravedad cuántica de las observaciones es un desafío. Ampliamos la idea de que la interacción de la gravedad cuántica con la materia podría ser clave para enfrentar este desafío. Por lo tanto, nos propusimos confrontar diferentes candidatos potenciales para la gravedad cuántica: seguridad asintótica unimodular, gravedad al cuadrado de Weyl y gravedad asintóticamente segura, con las limitaciones derivadas de exigir un Modelo Estándar completo ultravioleta. Específicamente, mostramos que dentro de las aproximaciones, exigir que la gravedad cuántica resuelva los problemas de los polos de Landau en los acoplamientos de gauge abelianos y los acoplamientos de Yukawa restringe fuertemente el espacio de parámetros gravitacionales viables. En el caso de la gravedad al cuadrado de Weyl con un acoplamiento gravitacional adimensional, también investigamos si la contribución gravitacional a las funciones beta en el sector de la materia calculada a partir de las técnicas del Grupo de Renormalización funcional es universal, mediante el estudio de la dependencia del regulador, la parametrización del campo métrico y la elección del calibre.Files
JHEP09(2019)100.pdf.pdf
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Additional details
Additional titles
- Translated title (Arabic)
- رابط مهم: نحو الاختبارات الظاهرية للسلامة المقاربة أحادية النسق
- Translated title (French)
- Un lien qui compte : vers des tests phénoménologiques de sécurité asymptotique unimodulaire
- Translated title (Spanish)
- Un vínculo que importa: hacia pruebas fenomenológicas de seguridad asintótica unimodular
Identifiers
- Other
- https://openalex.org/W3099779777
- DOI
- 10.1007/jhep09(2019)100
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