To reach ultra-low detection thresholds necessary to probe unprecedentedly low Dark Matter masses, target material alternatives and novel detector designs are essential. One such target material is ...superfluid
^4
4
He which has the potential to probe so far uncharted light Dark Matter parameter space at sub-GeV masses. The new “Direct search Experiment for Light dark matter”, DELight, will be using superfluid helium as active target, instrumented with magnetic micro-calorimeters. It is being designed to reach sensitivity to masses well below 100 MeV in Dark Matter-nucleus scattering interactions.
Detector simulation is a key component for studies on prospective future high-energy colliders, the design, optimization, testing and operation of particle physics experiments, and the analysis of ...the data collected to perform physics measurements. This review starts from the current state of the art technology applied to detector simulation in high-energy physics and elaborates on the evolution of software tools developed to address the challenges posed by future accelerator programs beyond the HL-LHC era, into the 2030–2050 period. New accelerator, detector, and computing technologies set the stage for an exercise in how detector simulation will serve the needs of the high-energy physics programs of the mid 21st century, and its potential impact on other research domains.
Abstract The prospects are presented for precise measurements of the branching ratios of the purely leptonic $$B_c^+ \rightarrow \tau ^+ \nu _\tau $$ B c + → τ + ν τ and $$B^+ \rightarrow \tau ^+ \nu ..._\tau $$ B + → τ + ν τ decays at the Future Circular Collider (FCC). This work is focused on the hadronic $$\tau ^{+} \rightarrow \pi ^+ \pi ^+ \pi ^- {\bar{\nu }}_\tau $$ τ + → π + π + π - ν ¯ τ decay in both $$B_c^+ \rightarrow \tau ^+ \nu _\tau $$ B c + → τ + ν τ and $$B^+ \rightarrow \tau ^+ \nu _\tau $$ B + → τ + ν τ processes. Events are selected with two Boosted Decision Tree algorithms to optimise the separation between the two signal processes as well as the generic hadronic Z decay backgrounds. The range of the expected precision for both signals are evaluated in different scenarios of non-ideal background modelling. This paper demonstrates, for the first time, that the $$B^+ \rightarrow \tau ^+ \nu _\tau $$ B + → τ + ν τ decay can be well separated from both $$B_c^+ \rightarrow \tau ^+ \nu _\tau $$ B c + → τ + ν τ and generic $$Z\rightarrow b{\bar{b}}$$ Z → b b ¯ processes in the FCC-ee collision environment and proposes the corresponding branching ratio measurement as a novel way to determine the CKM matrix element $$|V_{ub}|$$ | V ub | . The theoretical impacts of both $$B^+ \rightarrow \tau ^+ \nu _\tau $$ B + → τ + ν τ and $$B_c^+ \rightarrow \tau ^+ \nu _\tau $$ B c + → τ + ν τ measurements on New Physics cases are discussed for interpretations in the generic Two-Higgs-doublet model and leptoquark models.
Prospects for Bc+ and B+→τ+ντ at FCC-ee Zuo, Xunwu; Fedele, Marco; Helsens, Clément ...
The European physical journal. C, Particles and fields,
01/2024, Letnik:
84, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The prospects are presented for precise measurements of the branching ratios of the purely leptonic
B
c
+
→
τ
+
ν
τ
and
B
+
→
τ
+
ν
τ
decays at the Future Circular Collider (FCC). This work is ...focused on the hadronic
τ
+
→
π
+
π
+
π
-
ν
¯
τ
decay in both
B
c
+
→
τ
+
ν
τ
and
B
+
→
τ
+
ν
τ
processes. Events are selected with two Boosted Decision Tree algorithms to optimise the separation between the two signal processes as well as the generic hadronic
Z
decay backgrounds. The range of the expected precision for both signals are evaluated in different scenarios of non-ideal background modelling. This paper demonstrates, for the first time, that the
B
+
→
τ
+
ν
τ
decay can be well separated from both
B
c
+
→
τ
+
ν
τ
and generic
Z
→
b
b
¯
processes in the FCC-ee collision environment and proposes the corresponding branching ratio measurement as a novel way to determine the CKM matrix element
|
V
ub
|
. The theoretical impacts of both
B
+
→
τ
+
ν
τ
and
B
c
+
→
τ
+
ν
τ
measurements on New Physics cases are discussed for interpretations in the generic Two-Higgs-doublet model and leptoquark models.
Following recent ATLAS and CMS publications we interpret the results of their Higgs searches in terms of standard model operators. For a Higgs boson mass of 125 GeV we determine several Higgs ...couplings from published 2011 data and extrapolate the results towards different scenarios of LHC running. Even though our analysis is limited by low statistics we already derive meaningful constraints on modified Higgs sectors.
Ist das W‐Boson schwerer als erwartet? Husemann, Ulrich; Klute, Markus; Müller, Thomas
Physik in unserer Zeit,
07/2022, Letnik:
53, Številka:
4
Journal Article
Das W‐Boson ist das Feldquant der geladenen schwachen Wechselwirkung. Seine Masse ist etwa 90‐mal höher als die des Protons. Eine neue Präzisionsmessung dieser Masse mit Daten des CDF‐Experiments am ...Tevatron Collider am Fermilab weist eine signifikante Abweichung vom Standardmodell der Teilchenphysik auf.
Ist das W‐Boson schwerer als erwartet? Husemann, Ulrich; Klute, Markus; Müller, Thomas
Physik in unserer Zeit,
July 2022, Letnik:
53, Številka:
4
Journal Article
Das W‐Boson ist das Feldquant der geladenen schwachen Wechselwirkung. Seine Masse ist etwa 90‐mal höher als die des Protons. Eine neue Präzisionsmessung dieser Masse mit Daten des CDF‐Experiments am ...Tevatron Collider am Fermilab weist eine signifikante Abweichung vom Standardmodell der Teilchenphysik auf.
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