at Wayne State (SC )

Transcription

1 Wayne State University: at Wayne State (SC ) Belle Physics Final Report, January 2016 Accomplishments Goals The major goals of our work on Belle II were to complete our contributions, a 64 channel PIN diode based radiation monitor, to the precursor detector called Beast II and the electronics for the endcap K-Long/Muon (E-KLM) detector. This was done by Professor Cinabro, Technician Gutierrez, and undergraduate labor supported by US-Japan funds. Professor Bonvicini through US-Japan funds led the development and installation of a beamstrahlung monitor system in the Belle II interaction region. Graduate students Farhat and DiCarlo worked on this. We also worked on charm physics analysis. Accomplished The E-KLM electronics were completed in November 2014 and shipped to KEK for installation in March of We completed the PIN diode radiation monitor shipping completed analog amplifiers, long cables to the interaction region, an analog to digital patch panel, and a digital readout system to the University of Hawaii for integration tests by mid The integrated system was shipped on to KEK in September, and has been installed in the Belle II interaction region by Nayak, who relocated to KEK then.

2 The beamstrahlung system was constructed at Wayne State and shipped to KEK in July of It was installed by Bovicini and DiCarlo in August of 2015 and is ready for first beams in February Ganguly completed her PhD thesis on rare D decays and graduated in June The paper on that analysis has been published and appears in our list of journal publications indicated by a *. PI Cinabro, Professor Bonvicini, and Nayak, have all continued to contribute to Belle physics analysis as internal reviewers of analysis and paper drafts in charm physics. Training and Professional Development Ganguly took a post-doc job at the University of Illinois-Champaign/Urbana working in particle physics. Bonvicini was her advisor. Farhat completed his PhD thesis on the system and graduated in August of Bonvicini was his advisor. Farhat now works at Ford Motor as systems analyst. Nayak is the leader of the Beast II effort at KEK where efforts are now focused on in situ calibration and integrating the Beast II readout with the SuperKEKB control and monitor system. DiCarlo is continuing as a PhD candidate at Wayne State. Dissemination of Results Cinabro and Nayak are working with our collaborators on a Belle Note documenting the Beast II system that we plan to turn into a publication.

3 Bonvicini and DiCarlo are doing the same documenting the beamstrahlung system. Products Only listed are published journal articles. The * indicates the publication related to Ganguly's thesis. Type Title Author(s) Journal Peer Rev? Status Volume Issue Page ID Publication Date Observation of B0^p A D(*)- Belle Collaboration PRL Yes Published Measurement of the branching ratio of $\bar{b} \to DA((\ast)} \taua- \bar{\nu}_\tau$ relative to $\bar{b} \to DA{(\ast)} \ella- \bar{\nu}_\ell$ decays with hadronic tagging at Belle Belle Collaboration PRD Yes Published First observation of the hadronic transition $ \Upsilon(4S) \to \eta h_{b}(1p)$ and new measurement of the $h_b(1p)$ and $\eta_b(1s)$ parameters Belle Collaboration PRL Yes Published Measurement of $ea+ea- \to \gamma\chi_{cj}$ via initial state radiation at Belle Belle Collaboration PRD Yes Published Study of $DA{**}$ production and light hadronic states in the $\bar{b}a0 \to DA{*+} \omega \pia-$ decay Belle Collaboration PRD Yes Published Search for B+^+viy decays with hadronic tagging using the full Belle data sample Belle Collaboration PRD Yes Published

4 Measurements of B ^D Ds0 *+ (2317 ) decay rates and a search for isospin partners of the Ds0 *+ (2317 ) Belle Collaboration PRD Yes Published Semi-inclusive studies of semileptonic $B_s$ decays at Belle Belle Collaboration PRD Yes Published Evidence for the decay B0->eta pia0 Belle Collaboration PRD Yes Published (R) 2015 Measurement of the branching fraction of BA+ -> taua+ nu_tau decays with the semileptonic tagging method Belle Collaboration PRD Yes Published Search for the decay $BA+\rightarrow\overline{K}{}A{*0}KA{*+}$ at Belle Belle Collaboration PRD Yes Published Observation of X (3872 ) in B (3872 )K n decays Belle Collaboration PRD Yes Published Search for B decays to final states with the n c meson Belle Collaboration JHEP Yes Published Measurement of the Direct C P Asymmetry in B ^Xs +dy Decays with a Lepton Tag Belle Collaboration PRL Yes Published Measurements of sigma(ea+ ea- -> Upsilon(nS)piA+piA-) and sigma(ea+ ea- -> b bbar) in the Upsilon(10860) and Upsilon(11020) resonance regions Belle Collaboration PRD Yes Published Search for $B_{s}A{0}\rightarrow\gamma\gamma$ and a measurement of the branching fraction for $B_{s}A{0}\rightarrow\phi\gamma$ Belle Collaboration PRD Yes Published

5 Measurement of the B ^Xsy branching fraction with a sum of exclusive decays Belle Collaboration PRD Yes Published Measurement of B ^Ds"Ks tc+ and B+^Ds"K+K+ branching fractions Belle Collaboration PRD Yes Published Measurement of e+e'^-rc+rc'y (2 S ) via initial state radiation at Belle Belle Collaboration PRD Yes Published Evidence of $\Upsilon(1S) \to J/\psi+\chi_{c1}$ and search for doublecharmonium production in $\Upsilon(1S)$ and $\Upsilon(2S)$ decays Belle Collaboration PRD Yes Published Observation of a new charged charmoniumlike state in B -> J/psi K pi decays Belle Collaboration PRD Yes Published Observation of the decay $Ba \to \eta' Ka*(892)a $ Belle Collaboration PRD Yes Published Measurement of Time-Dependent $CP$ Violation in $BA \to \eta'ka $ Decays Belle Collaboration JHEP Yes Published Observation of $ea+ea- \to \pv+ \pv- \pv \chi_{bj}$ and search for $X_b \to \omega \Upsilon(1S)$ at $\sqrt{s}\sim $ GeV Belle Collaboration PRL Yes Published The Physics of the B Factories Bevan, A.J. et al. EPJC Yes Published Measurements of the masses and widths of the $\Sigma_{c}(2455)A{0/++}$ and $\Sigma_{c}(2520)A{0/++}$ baryons Belle Collaboration PRD Yes Published * Measurement of ${DA{0}}$-${\overline{D}{}A{0}}$ Mixing and Search for Indirect $CP$ Violation Using ${DA \to K_SA0\pV+\pV-}$ Decays

6 Belle Collaboration PRD Yes Published Search for CP violation in DA0 -> pia0 pia0 decays Belle Collaboration PRL Yes Published Amplitude analysis of e+e'^t (n S )n+n" at V{s }= GeV Belle Collaboration PRD Yes Published Updated Cross Section Measurement of $ea+ ea- \to KA+ KA- J/\psi$ and $K_SA0K_SA0J/\psi$ via Initial State Radiation at Belle Belle Collaboration PRD Yes Published Observation of D0-D 0 Mixing in e+e- Collisions Belle Collaboration PRL Yes Published Participants Individuals 1) Name: David Cinabro (Cinabro@physics.wayne.edu) 2) Project Role: PI 3) Nearest person month worked: 12 4) Contribution to Project: Directs others, design and study of PIN system, organized and oversaw KLM electronics production, contributes to charm analysis 5) Funding Support: 9 Months Wayne State, 2 Months this grant 1) Name: Giovanni Bonvicini (giovanni@physics.wayne.edu) 2) Project Role: co-pi 3) Nearest person month worked: 12 4) Contribution to Project: beamstrahlung system head, contributes of charm analysis 5) Funding Support: 9 Months Wayne State, 2 Months this grant

7 1) Name: Minakshi ) 2) Project Role: Postdoc 3) Nearest person month worked: 12 4) Contribution to Project: Validate PIN system, calibration of PIN system, PIN readout and analysis software, Installation of PIN system, charm physics analysis 5) Funding Support: All this grant 1) Name: Sudeshna 2) Project Role: Graduate Student 3) Nearest person month worked: 12 4) Contribution to Project: charm physics analysis 5) Funding Support: All this grant 1) Name: Hussein 2) Project Role: Graduate Student 3) Nearest person month worked: 6 4) Contribution to Project: beamstrahlung system 5) Funding Support: All this grant 1) Name: Salvatore DiCarlo (salvatore.di.carlo@wayne.edu) 2) Project Role: Graduate Student 3) Nearest person month worked: 6 4) Contribution to Project: beamstrahlung system 5) Funding Support: All this grant 1) Name: Alfredo Guiterrez (alfredo@wayne.edu) 2) Project Role: Technician 3) Nearest person month worked: 3 4) Contribution to Project: PIN system construction, beamstrahlung system construction, KLM electronics 5) Funding Support: This grant Partners 1) Organization Name: Belle Collaboration 2) Location: KEK, Japan

8 3) Contribution: Collaborative Effort 4) Financial Support: US-Japan for beamstrahlung hardware and EKLM Hardware and undergraduate labor 5) In-Kind Support: None 6) Facilities: SuperKEKB, Belle experiment, Belle II experiment 7) Collaborative Research: All 8) Personnel Exchanges: Time at KEK 9) Detail: Belle is an International Collaboration Impact Physical Infrastructure The main novel impact in this grant have been in our contributions of novel hardware. These include the development of a cheap robust ionizing radiation monitor system in partnership with commercial manufacturing company, Cremat Inc. Professor Cinabro worked closely with Cremat in producing a multichannel system that is new to their product line, and is now being sold to the general public. The beamstrahlung monitor system has the potential to transform the optimization of delivered luminosity in particle factories.