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Yearly Archives: 2018

First data on beam-spin asymmetries of di-hadron pairs at CLAS12 shown at DNP

I just came back from the Division of Nuclear Physics meeting of the APS where I could show our first data on beam spin asymmetries from hadron pairs: This plot shows the asymmetry vs. x Bjorken (roughly the momentum that the struck quark carries of the parent nucleon). There is a very suggestive rise of […]

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Belle II might revamp the standard model

…well we already knew that, but it made the list of the three experiments which might revamp the standard model in this article here: https://www.sciencenews.org/article/new-particle-physics-experiments-revamp-standard-model

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Paper on the first observation of transverse Lambda polarization submitted to PRL

Finally, we submitted the paper about our result: http://inspirehep.net/record/1687566

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Anselm Vossen awarded DOE Early Career Award

Anselm Vossen was awarded the DOE Early Career Award.  See press release here.  

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Our paper on the “Measurement of the branching fraction of B→D(∗)πℓν at Belle using hadronic tagging in fully reconstructed event” is on the arxiv and submitted to PRD

The paper can be found here: http://inspirehep.net/record/1663226

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Our paper “Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p↑+p collisions at √s = 500 GeV” was accepted by PLB

Our paper presents the most precise measurements sensitive to the transversity distribution in p+p yet. This plot shows the results vs Eta which corresponds to the momentum the quark we are probing is carrying. As expected from previous measurements. Quarks carrying a higher momentum fraction of the proton tend to also exhibit a higher polarization. […]

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First global extraction of transversity using our data from e+e- and pp

Our knowledge of the proton-wave function is gained mainly from scattering point like probes off the proton at energies high enough that individual quarks and gluons are resolved. In these high energy scattering events we access the proton wave-function in a frame where the proton moves at the speed of light. All components which are […]

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Nature Article about Belle II – We expect first collisions this month!

https://www.nature.com/articles/d41586-018-00162-x Here is a picture of the detector from last year with open endcap doors:  

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Welcome to the Vossen Group

Please see the menu above for a description of our research and potential thesis topics

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