CERN Accelerating science

CERN Theory

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2022-09-30
04:18
Determination of $\alpha_s(m_Z)$ by the non-perturbative decoupling method / Dalla Brida, Mattia (CERN) ; Höllwieser, Roman (Wuppertal U.) ; Knechtli, Francesco (Wuppertal U.) ; Korzec, Tomasz (Wuppertal U.) ; Nada, Alessandro (Turin U.) ; Ramos, Alberto (Valencia U., IFIC) ; Sint, Stefan (Hamilton Math. Inst., Dublin) ; Sommer, Rainer (Humboldt U., Berlin)
We present the details and first results of a new strategy for the determination of $\alpha_s(m_Z)$. [...]
IFIC/22-25 ; WUB/22-00 ; DESY-22-051 ; CERN-TH-2022-015 ; HU-EP-22/04 ; arXiv:2209.14204.
- 62 p.
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2022-09-30
04:18
Medium-enhanced $c\bar{c}$ radiation / Attems, Maximilian (CERN) ; Brewer, Jasmine (CERN) ; Innocenti, Gian Michele (CERN) ; Mazeliauskas, Aleksas (CERN) ; Park, Sohyun (CERN) ; van der Schee, Wilke (CERN) ; Wiedemann, Urs (CERN)
We show that the same QCD formalism that accounts for the suppression of high-$p_T$ hadron and jet spectra in heavy-ion collisions predicts medium-enhanced production of $c\bar{c}$ pairs in jets..
CERN-TH-2022-046 ; arXiv:2209.13600.
- 5 p.
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2022-09-30
04:17
A two-component vector WIMP -- fermion FIMP dark matter model with an extended seesaw mechanism / Costa, Francesco (Gottingen U.) ; Khan, Sarif (Gottingen U.) ; Kim, Jinsu (CERN)
We consider an extension of the Standard Model that explains the neutrino masses and has a rich dark matter phenomenology. [...]
CERN-TH-2022-155 ; arXiv:2209.13653.
- 42 p.
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2022-09-28
04:00
Asymptotic Accelerated Expansion in String Theory and the Swampland / Calderón-Infante, José (Madrid, IFT) ; Ruiz, Ignacio (Madrid, IFT) ; Valenzuela, Irene (Madrid, IFT ; CERN)
We study whether the universal runaway behaviour of stringy scalar potentials towards infinite field distance limits can produce an accelerated expanding cosmology à la quintessence. [...]
CERN-TH-2022-153 ; IFT-UAM/CSIC-22-110 ; arXiv:2209.11821.
- 59 p.
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2022-09-27
04:29
Constant primary operators and where to find them: The strange case of BPS defects in ABJ(M) theory / Gorini, Nicola (Milan Bicocca U.) ; Griguolo, Luca (Parma U.) ; Guerrini, Luigi (Durham U., Dept. of Math.) ; Penati, Silvia (Milan Bicocca U.) ; Seminara, Domenico (Florence U.) ; Soresina, Paolo (Parma U. ; CERN)
We investigate the one-dimensional defect SCFT defined on the $1/2$ BPS Wilson line/loop in ABJ(M) theory. [...]
CERN-TH-2022-146 ; arXiv:2209.11269.
- 36 p.
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2022-09-27
04:27
How Broad is a Neutrino? / Banks, Hannah (Cambridge U., DAMTP ; CERN) ; Kelly, Kevin J. (CERN ; Texas A-M) ; McCullough, Matthew (CERN)
Canonical neutrino oscillations arise due to the propagation of three mass eigenstates from production to detection. [...]
CERN-TH-2022-152 ; arXiv:2209.11270.
- 27 p.
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2022-09-22
04:02
High Quality Axion in Supersymmetric Models / Choi, Gongjun ; Yanagida, Tsutomu T.
In this work, we discuss how the use of the symmetries well motivated in physics beyond the Standard model (BSM) can guarantee the high quality axions. [...]
CERN-TH-2022-149 ; arXiv:2209.09290.
- 27 p.
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2022-09-20
14:43
New Sum Rules for the $B_c \to J/\psi$ Form Factors / Bordone, Marzia (CERN) ; Khodjamirian, Alexander (Siegen U.) ; Mannel, Thomas
We derive new sum rules for the form factors of the $B_c\to J/\psi\, \ell \bar{\nu}_\ell$ semileptonic transitions, employing the vacuum-to-$B_c$ correlation function of the $J/\psi$-interpolating and $b\to c$ weak currents. [...]
SI-HEP-2022-26 ; P3H-22-094 ; CERN-TH-2022-144 ; arXiv:2209.08851.
- 30 p.
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2022-09-16
04:25
The Irreducible Axion Background / Langhoff, Kevin (UC, Berkeley ; LBL, Berkeley) ; Outmezguine, Nadav (UC, Berkeley ; LBL, Berkeley) ; Rodd, Nicholas L. (CERN)
Searches for dark matter decaying into photons constrain its lifetime to be many orders of magnitude larger than the age of the Universe. [...]
CERN-TH-2022-148 ; arXiv:2209.06216.
- 14 p.
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2022-09-15
04:22
Current and future gamma-ray searches for dark-matter annihilation beyond the unitarity limit / Tak, Donggeun (DESY, Zeuthen) ; Baumgart, Matthew (Arizona State U.) ; Rodd, Nicholas L. (CERN) ; Pueschel, Elisa (DESY, Zeuthen)
For decades, searches for electroweak-scale dark matter (DM) have been performed without a definitive detection. [...]
arXiv:2208.11740 ; CERN-TH-2022-139 ; DESY-22-138.
- 14 p.
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