F. C. Porter
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View article: Development, production, and testing of the Mu2e Calorimeter Silicon Photomultipliers
Development, production, and testing of the Mu2e Calorimeter Silicon Photomultipliers Open
The development and production of the custom Silicon Photomultipliers (SiPMs) for the Mu2e Calorimeter (Mu2e SiPMs) was a complex endeavor, involving meticulous design, procurement, testing, and integration processes. After a thorough anal…
View article: Status of the Mu2e calorimeter readout electronics
Status of the Mu2e calorimeter readout electronics Open
The Mu2e experiment [1] at Fermilab will search for the neutrino-less coherent conversion of a muon into an electron in the field of a nucleus. Mu2e detectors comprise a straw tracker, an electromagnetic calorimeter and a veto for cosmic r…
View article: The Mu2e Calorimeter
The Mu2e Calorimeter Open
The EM CsI crystals and SiPM readout calorimeter of the Mu2e experiment is fully assembled, with all components completed and tested; the mechanical structure is fully built, with a complete integration and test of all the analog sensors a…
View article: The Mu2e crystal and SiPM calorimeter
The Mu2e crystal and SiPM calorimeter Open
The calorimeter of the Mu2e experiment is being assembled, with all production components completed and tested, apart from the digital electronics that is still underway. The mechanical structure is fully built, with a complete integration…
View article: Model-independent extraction of form factors and $|V_{cb}|$ in $\overline{B} \rightarrow D \ell^- \overlineν_\ell$ with hadronic tagging at BaBar
Model-independent extraction of form factors and $|V_{cb}|$ in $\overline{B} \rightarrow D \ell^- \overlineν_\ell$ with hadronic tagging at BaBar Open
Using the entire BaBar $Υ(4S)$ data set, the first two-dimensional unbinned angular analysis of the semileptonic decay $\overline{B} \rightarrow D \ell^- \overlineν_\ell$ is performed, employing hadronic reconstruction of the tag-side $B$ …
View article: Workshop on a future muon program at FNAL
Workshop on a future muon program at FNAL Open
The Snowmass report on rare processes and precision measurements recommended Mu2e-II and a next generation muon facility at Fermilab (Advanced Muon Facility) as priorities for the frontier. The Workshop on a future muon program at FNAL was…
View article: The Mu2e Crystal and SiPM Calorimeter: Construction Status
The Mu2e Crystal and SiPM Calorimeter: Construction Status Open
The Mu2e experiment at Fermilab searches for the neutrino-less conversion of a negative muon into an electron, with a distinctive signature of a mono-energetic electron with an energy of 104.967 MeV. The calorimeter is made of two disks of…
View article: Search for heavy neutral leptons using tau lepton decays at <i>BaBaR</i>
Search for heavy neutral leptons using tau lepton decays at <i>BaBaR</i> Open
This article presents a model-independent search for an additional, mostly sterile, heavy neutral lepton (HNL), that is capable of mixing with the Standard Model τ neutrino with a mixing strength of |Uτ4|2, corresponding to the absolute sq…
View article: Search for $B$ Mesogenesis at BABAR
Search for $B$ Mesogenesis at BABAR Open
A new mechanism has been proposed to simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the universe. This scenario predicts exotic $B$ meson decays into a baryon and a dark sector anti-baryon ($ψ_D$)…
View article: Towards the construction of the Mu2e electromagnetic calorimeter at Fermilab
Towards the construction of the Mu2e electromagnetic calorimeter at Fermilab Open
Mu2e will search for the Charge Lepton Flavor Violating (CLFV) conversion of a muon into an electron in the field of a nucleus. A clean discovery signature is provided by the mono-energetic conversion electron ( E e = 104.96 MeV). If no ev…
View article: Mu2e Crystal Calorimeter Readout Electronics: Design and Characterisation
Mu2e Crystal Calorimeter Readout Electronics: Design and Characterisation Open
The Mu2e experiment at Fermi National Accelerator Laboratory will search for the charged-lepton flavour-violating neutrinoless conversion of negative muons into electrons in the Coulomb field of an Al nucleus. The conversion electron with …
View article: The Mu2e Crystal Calorimeter: An Overview
The Mu2e Crystal Calorimeter: An Overview Open
The Mu2e experiment at Fermilab will search for the standard model-forbidden, charged lepton flavour-violating conversion of a negative muon into an electron in the field of an aluminium nucleus. The distinctive signal signature is represe…
View article: Search for an Axionlike Particle in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math> Meson Decays
Search for an Axionlike Particle in Meson Decays Open
Axionlike particles (ALPs) are predicted in many extensions of the standard model, and their masses can naturally be well below the electroweak scale. In the presence of couplings to electroweak bosons, these particles could be emitted in …
View article: Development, construction and qualification tests of the Mu2e electromagnetic calorimeter mechanical structures
Development, construction and qualification tests of the Mu2e electromagnetic calorimeter mechanical structures Open
The “muon-to-electron conversion” (Mu2e) experiment at Fermilab will search for the Charged Lepton Flavour Violating neutrino-less coherent conversion of a muon into an electron in the field of an aluminum nucleus. The observation of this …
View article: Mu2e-II: Muon to electron conversion with PIP-II
Mu2e-II: Muon to electron conversion with PIP-II Open
An observation of Charged Lepton Flavor Violation (CLFV) would be unambiguous evidence for physics beyond the Standard Model. The Mu2e and COMET experiments, under construction, are designed to push the sensitivity to CLFV in the mu to e c…
View article: Development, construction and qualification tests of the mechanical structures of the electromagnetic calorimeter of the Mu2e experiment at Fermilab
Development, construction and qualification tests of the mechanical structures of the electromagnetic calorimeter of the Mu2e experiment at Fermilab Open
The “muon-to-electron conversion” (Mu2e) experiment at Fermilab will search for the Charged Lepton Flavour Violating neutrino-less coherent conversion of a muon into an electron in the field of an aluminum nucleus. The observation of this …
View article: Mu - e Universality in Charged Current Neutrino Interactions in a Neon - H(2) Mixture
Mu - e Universality in Charged Current Neutrino Interactions in a Neon - H(2) Mixture Open
From an exposure of the Fermilab 15-ft Neon (64 atomic %)-H{sub 2} filled bubble chamber to a single-horn-focused {bar {nu}} beam, they have found 60 e{sup -}X and 35 e{sup +}X events, which they compare with 227 {mu}{sup -}X and 202 {mu}{…
View article: Development, construction and tests of the Mu2e electromagnetic calorimeter mechanical structures
Development, construction and tests of the Mu2e electromagnetic calorimeter mechanical structures Open
The “muon-to-electron conversion” (Mu2e) experiment at Fermilab will search for the charged lepton flavour violating neutrino-less coherent conversion of a muon into an electron in the field of an aluminum nucleus. The observation of this …
View article: Search for Lepton Flavor Violation in $Υ(3S)\rightarrow e^{\pm}μ^{\mp}$
Search for Lepton Flavor Violation in $Υ(3S)\rightarrow e^{\pm}μ^{\mp}$ Open
We report on the first search for electron-muon lepton flavor violation (LFV) in the decay of a $b$~quark and $b$~antiquark bound state. We look for the LFV decay $Υ(3S)\rightarrow e^{\pm}μ^{\mp}$ in a sample of 118~million $Υ(3S)$ mesons …
View article: Search for Darkonium in $e^+e^-$ Collisions
Search for Darkonium in $e^+e^-$ Collisions Open
Collider searches for dark sectors, new particles interacting only feebly with ordinary matter, have largely focused on identifying signatures of new mediators, leaving much of dark sector structures unexplored. In particular, the existenc…
View article: Final Design and Current Status of the Mu2e Crystal Calorimeter
Final Design and Current Status of the Mu2e Crystal Calorimeter Open
The Mu2e experiment at Fermi National Accelerator Laboratory will search for the CLFV neutrino-less conversion of a negative muon into an electron in the field of an aluminum nucleus. The Mu2e design has been studied to improve the single …
View article: Construction status of the Mu2e crystal calorimeter
Construction status of the Mu2e crystal calorimeter Open
The Mu2e experiment at Fermilab will search for the charged-lepton flavor violating neutrino-less conversion of a negative muon into an electron in the field of an aluminum nucleus. The Mu2e detector is composed of a tracker, an electromag…
View article: Measurement of B→Xγ Decays and Determination of |Vtd/Vts|
Measurement of B→Xγ Decays and Determination of |Vtd/Vts| Open
Using a sample of 383 × 10 6 B ¯¯¯ B events collected by the BABAR experiment, we measure sums of seven exclusive final states B → X d ( s ) γ , where X d ( X s ) is a nonstrange (strange) charmless hadronic system in the mass range 0.6 - …
View article: Search for B+→ℓ+νℓ recoiling against B−→D0ℓ−¯νX
Search for B+→ℓ+νℓ recoiling against B−→D0ℓ−¯νX Open
We present a search for the decay B + → ℓ + ν ℓ ( ℓ = τ , μ , or e ) in ( 458.9 ± 5.1 ) × 10 6 B ¯¯¯ B pairs recorded with the BABAR detector at the PEP-II B -factory. We search for these B decays in a sample of B + B − events where one B …
View article: Search for a Stable Six-Quark State at BABAR
Search for a Stable Six-Quark State at BABAR Open
Recent investigations have suggested that the six-quark combination uuddss could be a deeply bound state (S) that has eluded detection so far, and a potential dark matter candidate. We report the first search for a stable, doubly strange s…
View article: Electron beam test of the large area Mu2e calorimeter prototype
Electron beam test of the large area Mu2e calorimeter prototype Open
The Mu2e calorimeter consists of 1348 pure CsI crystals coupled to two large area UV-extended Silicon Photomultipliers (SiPMs) organized in two separate annular disks. An intense R&D phase has been pursued to check if this configuration sa…