A bstract Muon colliders are an exciting possibility for reaching the highest energies possible on the shortest timescale. They potentially combine the greatest strengths of e + e − and pp colliders by bridging the energy versus precision dichotomy. In this paper we study the sensitivity of Higgs properties that can be achieved with a future 3 or 10 TeV muon collider from single Higgs production. The results presented here represent the first comprehensive picture for the precision achievable including backgrounds and using fast detector simulation with Delphes. Additionally, we compare the results of fast detector simulation with available full simulation studies that include the muon collider specific Beam Induced Background, and show the results are largely unchanged. We comment on some of the strengths and weaknesses of a high energy muon collider for Higgs physics alone, and demonstrate the complementarity of such a collider with the LHC and e + e − Higgs factories. Furthermore, we discuss some of the exciting avenues for improving future results from both theoretical and detector R&D that could be undertaken.
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This content will become publicly available on June 23, 2024
Detector R&D needs for the next generation e+e− collider
The 2021 Snowmass Energy Frontier panel wrote in its final report "The realization of a Higgs factory will require an immediate, vigorous and targeted detector R&D program". Both linear and circular e+e− collider efforts have developed a conceptual design for their detectors and are aggressively pursuing a path to formalize these detector concepts. The U.S. has world-class expertise in particle detectors, and is eager to play a leading role in the next generation e+e− collider, currently slated to become operational in the 2040s. It is urgent that the U.S. organize its efforts to provide leadership and make significant contributions in detector R&D. These investments are necessary to build and retain the U.S. expertise in detector R&D and future projects, enable significant contributions during the construction phase and maintain its leadership in the Energy Frontier regardless of the choice of the collider project. In this document, we discuss areas where the U.S. can and must play a leading role in the conceptual design and R&D for detectors for e+e− colliders.
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- Award ID(s):
- 2046626
- NSF-PAR ID:
- 10497998
- Publisher / Repository:
- FERMILAB-PUB-23-451-CSAID-PPD Arxiv eprint = "2306.13567",
- Date Published:
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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Abstract The super
τ -charm facility (STCF) is an electron–positron collider proposed by the Chinese particle physics community. It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5 × 1035cm−2·s−1or higher. The STCF will produce a data sample about a factor of 100 larger than that of the presentτ -charm factory — the BEPCII, providing a unique platform for exploring the asymmetry of matter-antimatter (charge-parity violation), in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions, as well as searching for exotic hadrons and physics beyond the Standard Model. The STCF project in China is under development with an extensive R&D program. This document presents the physics opportunities at the STCF, describes conceptual designs of the STCF detector system, and discusses future plans for detector R&D and physics case studies. -
null (Ed.)A bstract We present measurements of the branching fractions for the decays B → Kμ + μ − and B → Ke + e − , and their ratio ( R K ), using a data sample of 711 fb − 1 that contains 772 × 10 6 $$ B\overline{B} $$ B B ¯ events. The data were collected at the ϒ(4 S ) resonance with the Belle detector at the KEKB asymmetric-energy e + e − collider. The ratio R K is measured in five bins of dilepton invariant-mass-squared ( q 2 ): q 2 ∈ (0 . 1 , 4 . 0) , (4 . 00 , 8 . 12) , (1 . 0 , 6 . 0), (10 . 2 , 12 . 8) and ( > 14 . 18) GeV 2 /c 4 , along with the whole q 2 region. The R K value for q 2 ∈ (1 . 0 , 6 . 0) GeV 2 /c 4 is $$ {1.03}_{-0.24}^{+0.28} $$ 1.03 − 0.24 + 0.28 ± 0 . 01. The first and second uncertainties listed are statistical and systematic, respectively. All results for R K are consistent with Standard Model predictions. We also measure CP -averaged isospin asymmetries in the same q 2 bins. The results are consistent with a null asymmetry, with the largest difference of 2.6 standard deviations occurring for the q 2 ∈ (1 . 0 , 6 . 0) GeV 2 /c 4 bin in the mode with muon final states. The measured differential branching fractions, $$ d\mathrm{\mathcal{B}} $$ d ℬ /dq 2 , are consistent with theoretical predictions for charged B decays, while the corresponding values are below the expectations for neutral B decays. We have also searched for lepton-flavor-violating B → Kμ ± e ∓ decays and set 90% confidence-level upper limits on the branching fraction in the range of 10 − 8 for B + → K + μ ± e ∓ , and B 0 → K 0 μ ± e ∓ modes.more » « less
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The first search for double charged charmonium-like state production in decays and in e^{+} e^{-} annihilation at \sqrt{s}= 10.52, 10.58, and 10.867 GeV is conducted using data collected with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant signals are observed in any of the studied modes.more » « less
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Higher education and research science is being conducted in an era of information abundance. Sharing educational resources (e.g. Libraries, Curriculums, Online courses) and science resources, such as data commons, instrumentation, technology, and best practices, across national borders, can promote expanded global education goals and scientific inquiry and has the potential to advance discovery. Providing robust diverse Research and Education Networks (RENs) linking the U.S., Brazil (S. America) and African researcher and education communities is an increasingly strategic priority. Africa has developed research and education communities with unique biological, environmental, geological, anthropological, and cultural resources. Research challenges in atmospheric and geosciences, materials sciences, tropical diseases, biology, astronomy, and other disciplines will benefit by enhancing the technological and social connections between the research and education communities of these three continents via an S. Atlantic route to complement the existing North Atlantic routes via Europe. This paper will discuss the availability of new submarine cable spectrum for RENs via SACS between Luanda, Angola and Fortaleza, Brazil and the Monet cable between Fortaleza and Florida in the U.S. for use by research and education communities. This new infrastructure creates an unprecedented opportunity for the stakeholders to coordinate planning efforts to strategically make use of the offered spectrum towards serving the broadest communities of interest in research and education. The new links will be a foundational layer for the employment of R&E networks outfitted with leading-edge technologies (e.g. Science DMZ, SDN, SDX, cybersecurity etc.). The paper seeks to leverage a discussion of opportunities for a new R&E Exchange point at Luanda, Angola, other connectivity options, and to further promote discussion and identify synergies with UbuntuNet members. Florida International University and AmLight consortium partners are planning, designing, and defining a strategy for high capacity connectivity research and education network connectivity between the US and Southwest Africa, called Americas Africa Research and eduCation Lightpaths (AARCLight). Furthermore, the other “end” of the SACS cable is being connected to an Open Fortaleza R&E Exchange point in Brazil. The new academic exchange point, South Atlantic Crossroads (SAX), is managed by Rede Nacional de Ensino e Pesquisa (RNP), where AmLight connects and continues on the Monet spectrum to Boca Raton Miami Florida. Having the transport service opened in Fortaleza will allow RENs from South America to collaborate with partners in Africa with significantly less delay, (at least 150ms lower) than using the current paths available. Interactive high-resolution video and big data applications will benefit from the establishment of the SAX international exchange point in Fortaleza.more » « less
