Thursday, September 20, 2018, 1:30 pm

Hosted by: Andreas Weichselbaum

The functional renormalization group (fRG) is a versatile, quantum-field-theoretical formulation of the powerful RG idea and has seen a large number of successful applications. The main limitation of this framework is the truncation of the hierarchy of flow equations, where typically effective three-particle interactions are neglected altogether. From another perspective, the parquet formalism consists of self-consistent many-body relations on the one- and two-particle level and allows for the most elaborate diagrammatic resummations. Here, we unify these approaches by deriving multiloop fRG flow equations from the self-consistent parquet relations [1]. On the one hand, this circumvents the reliance on higher-point vertices within fRG and equips the method with quantitative predictive power [2]. On the other hand, it enables solutions of the parquet equations in previously unaccessible regimes. Using the X-ray-edge singularity as an example, we introduce the formalism and illustrate our findings with numerical results [3]. Finally, we discuss applications to the 2D Hubbard model [4] and the combination of multiloop fRG with the dynamical mean-field theory. [1] F. B. Kugler and J. von Delft, arXiv:1807.02898 (2018) [2] F. B. Kugler and J. von Delft, PRB 97, 035162 (2018) [3] F. B. Kugler and J. von Delft, PRL 120, 057403 (2018) [4] A. Tagliavini, C. Hille, F. B. Kugler, S. Andergassen, A. Toschi, and C. Honerkamp, arXiv:1807:02697 (2018)

Thursday, September 20, 2018, 3:00 pm

Hosted by: David Jaffe

The first generation of B-Factories, BaBar and Belle, operated over the previous decade and produced many world-leading measurements related to flavor physics. Their discoveries contributed to the awarding of the 2008 Nobel Prize in Physics. The Belle II experiment, now underway at the KEK laboratory in Japan, is a substantial upgrade of both the Belle detector and the KEKB accelerator. It aims to collect 50 times more data than existing B-Factory samples. This will provide unprecedented sensitivity to new physics signatures in the flavor sector. This talk will present the upgrade efforts of the Belle II experiment, results from its recent first e+e- collisions, and the future physics opportunities the experiment will provide.

Thursday, September 20, 2018, 4:00 pm

Hosted by: Andrey Tarsov

Friday, September 21, 2018, 12:15 pm

Hosted by: Christoph Lehner

Friday, September 21, 2018, 12:30 pm

Hosted by: Ignace Jarrige

X-ray Bragg ptychography is a scanning coherent diffraction imaging microscopy technique that can produce 3D maps of the crystalline structure of an extended nanostructured crystal at about 10nm resolution. With sparse-angle Bragg ptychography, the 3D maps can be extracted from an extremely undersampled data-set. This new strategy substantially reduces the acquisition time and mitigates problems, linked to radiation damage and instabilities, faced by conventional Bragg ptychography. However, the success of the image reconstruction is based on a good knowledge of the probe, whose uncertainties degrade the object reconstruction. In this talk, we solve this problem by proposing a simultaneous reconstruction of the probe and object functions. This is based on a strong but natural constraint of the probe properties. We demonstrate our approach on a He-implanted poly-crystalline Tungsten sample measured at ID01-ESRF. These findings open new possibilities for this imaging technique.

Friday, September 21, 2018, 2:00 pm

Hosted by: Andrey Tarasov

Pythia 8 is a general-purpose Monte-Carlo event generator widely used to simulate high-energy proton-proton collisions at the LHC. Recently it has been extended to handle also other collision systems involving lepton and heavy-ion beams. In this seminar I will review the current Pythia 8 capabilities in processes relevant to an Electron-Ion Collider (EIC) and discuss about the projected future improvements. The relevant processes can be divided into two regions based on the virtuality of the intermediate photon: deeply inelastic scattering (DIS) at high virtualities and photoproduction at low virtualities. I will begin with an introduction of the event generation steps in Pythia 8 and then briefly discuss how the DIS processes can be simulated. Then I present our photoproduction framework and compare the results to the HERA data for charged-hadron and dijet production in lepton-proton collisions. In particular I discuss about the role of multiparton interactions in photon-proton interactions with resolved photons and how these can be constrained with the existing HERA data. Then I discuss how the same framework can be applied to ultra-peripheral heavy-ion collisions at the LHC where one can study high-energy photon-nucleus interactions in a kinematic region comparable to EIC. Finally I will show our first predictions for dijet production in these events and quantify the contribution of diffractive events according to the hard diffractionmodel that has been recently implemented into Pythia 8.

Friday, September 21, 2018, 7:00 pm

Monday, September 24, 2018, 12:00 pm

Hosted by: Cynthia Hernandez

Tuesday, September 25, 2018, 3:00 pm

Hosted by: Alessandro Tricoli

The branching ratio of the Standard Model (SM) Higgs boson to non-SM or "exotic" states is currently constrained to be less than 34% at 95% confidence level. This opens possibility to search for new particles in the decays of the Higgs boson. Such searches could provide a unique access to hidden-sector states that are singlets under the SM gauge transformations. A search for decays of the Higgs boson to a pair of new spin–0 particles, H → aa, where the a–bosons decay to a b-quark pair and a muon pair, is presented in this seminar. The analysis uses 36.1 fb−1 of proton-proton collisions data with √s = 13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. No deviation from the Standard Model prediction is observed and limits on Br(H → aa → bbμμ) are set in the a–boson mass range of 20–60 GeV. Searches in other final states, such as four b-quarks (H → aa → 4b) and two jets and two photons (H → aa → ggγγ), are also discussed.

Tuesday, September 25, 2018, 3:30 pm

Hosted by: Rob Pisarski

The US-based Electron-Ion Collider (EIC) is a future high-luminosity, polarized collider dedicated to the physics of the nucleon/nucleus structure. Among the many physics problems that can be addressed at the EIC, I will focus on the origin of the mass and spin of the nucleon, namely, how they can be understood in terms of quarks' and gluons' degrees of freedom. I will give a review of the mass and spin decompositions in QCD and discuss possible experimental observables.

Wednesday, September 26, 2018, 2:00 pm

Hosted by: Christopher Murphy

Friday, September 28, 2018, 2:00 pm

Hosted by: Chun Shen

Monday, October 1, 2018, 3:00 pm

Hosted by: Alessandro Tricoli

The decay K+→π+νν, with a very precisely predicted branching ratio of less than 10^{-10}, is one of the best candidates to reveal indirect effects of new physics at the highest mass scales. The NA62 experiment at CERN SPS is designed to measure the branching ratio of the K+→π+νν with a decay-in-flight technique, novel for this channel. NA62 took data in 2016, 2017 and another year run is scheduled in 2018. Statistics collected in 2016 allows NA62 to reach the Standard Model sensitivity for K+→π+νν, entering the domain of 10-10 single event sensitivity and showing the proof of principle of the experiment. The analysis data is reviewed and the preliminary result from the 2016 data set presented. In addition, owing to the high beam-energy and a hermetic detector coverage, NA62 also has the opportunity to directly search for a plaethora of long-lived beyond-the Standard Model particles, such as Axion-like Particles and Dark Photons. We will review the status and results of this searches and give prospects for future data taking at NA62.

Tuesday, October 2, 2018, 11:00 am

Hosted by: Jiangyong Jia

A major goal of the ongoing experimental programs at RHIC is to chart the QCD phase diagram.Pinpointing the location of the first order phase boundary which terminates at a critical end point (CEP), in the temperature versus baryon chemical potential (T,µB) plane of this phase diagram, is key to this mapping. Finite-Size-Finite-Time succeptibility scaling functions can give crucial insight on these essential landmarks of the phase diagram. I will discuss recent attempts to extract and use such scaling functions to pin down the location of the CEP, as well as the associated critical exponents required to identify its universality class.

Tuesday, October 2, 2018, 4:00 pm

Hosted by: Christie Nelson

Thursday, October 4, 2018, 1:00 pm

Hosted by: Chao Zhang

Understanding the properties of dark matter particle is a fundamental problem in particle physics and cosmology. The search of dark matter particle scattering off nuclei target using ultra-low background detector is one of the most promising technology to decipher the nature of dark matter. The XENON1T experiment, which is a dual phase detector with ~2.0 tons of xenon running at the Gran Sasso Laboratory in Italy, is designed to lead the field of dark matter direct detection. Since November 2016, the XENON1T detector is continuously taking data, with a background rate of more than one order of magnitude lower than any current generation dark matter search experiment. In this talk, I will present the latest results from XENON1T. Details about the XENON1T detector as well as the data analysis techniques will also be covered.

Thursday, October 4, 2018, 3:00 pm

Hosted by: Chi-Ting Chiang

Thursday, October 4, 2018, 4:00 pm

Hosted by: Mingzhao Liu

Progress in the emergent field of topological superconductivity relies on synthesis of new material combining superconductivity, low density, and spin-orbit coupling (SOC). Theory indicates that the interface between a one-dimensional semiconductor with strong SOC and a superconductor hosts Majorana-modes with nontrivial topological properties. We discuss the recent developments in epitaxial growth of Al on InAs nanowires was shown to yield a high quality superconductor-semiconductor system with uniformly transparent interfaces and a hard induced gap, indicted by strongly suppressed subgap tunneling conductance. We have developed a two-dimensional (2D) surface InAs quantum wells with epitaxial superconducting Aluminum, yielding a planar system with structural and transport characteristics as good as the epitaxial nanowires. The realization of 2D epitaxial superconductor-semiconductor systems represent a significant advance over wires, allowing extended networks via top-down processing. We present our recent developments in materials synthesis and growth of these density-controlled surface 2D electron-gases and demonstrate Josephson junctions with highly transparent contacts. These developments have lead to unprecedented control over proximity effect in semiconductors where electron densities can be tuned using a gate voltage. We discuss potential applications of this new material system that can serve as a platform for low power circuits, gate-based qubits as well as exploring topological superconductivity for computation.

Wednesday, October 10, 2018, 2:30 pm

Thursday, October 11, 2018, 3:00 pm

Hosted by: Alessandro Tricoli

The Higgs boson discovery at the LHC marked a historic milestone in the study of fundamental particles and their interactions. Over the last six years, we have begun measuring its properties, which are essential to build a deep understanding of the Higgs sector of the Standard Model and to potentially uncover new phenomena. The Higgs' favored decay mode to beauty (b) quarks (~60%) had so far remained elusive because of the overwhelming background of b-quark production due to strong interactions. Observing the Higgs decay to b-quarks was one of the critical missing pieces of our knowledge of the Higgs sector. Measuring this decay is a fundamental step to confirm the mass generation for fermions and may also provide hints of physics beyond the Standard Model. The CMS observation of the decay of the SM Higgs boson into a pair of b-quarks exploiting an exclusive production mode (VH) is yet another major milestone. This experimental achievement at the LHC, considered nearly impossible in the past, makes use of several advanced machine learning techniques to identify the b-quark distinctive signature, improve the Higgs boson mass resolution, and discriminate the Higgs boson signal from background processes.

Thursday, October 11, 2018, 4:00 pm

Hosted by: John Hill

Nudaurelia Capensis ? Virus (N?V) is a eukaryotic, quasi-equivalent, RNA virus, with a T=4 surface lattice, where maturation is dramatic (a change in particle size of 100Å) and is novel in that it can be investigated in vitro. Here we use X-ray crystallography, biochemistry, Small Angle X-ray Scattering, and electron cryo-microscopy and image reconstruction (CryoEM), to characterize maturation intermediates, an associated auto-catalytic cleavage, the kinetics of morphological change and to demonstrate that regions of N?V subunit folding are maturation-dependent and occur at rates determined by their quasi-equivalent position in the capsid. Matsui, T., Lander, G. C., Khayat, R., and Johnson, J. E. 2010. Subunits fold at position-dependent rates during maturation of a eukaryotic RNA virus. Proc Natl Acad Sci U S A 107:14111-5. Veesler, D., and Johnson, J.E. 2012. Virus Maturation. Annual review of biophysics 41:473-496. Doerschuk, P. C., Gong, Y., Xu, N., Domitrovic, T., and Johnson, J. E. 2016. Virus particle dynamics derived from CryoEM studies. Curr Opin Virol 18:57-63.

Friday, October 12, 2018, 2:00 pm

Hosted by: Andrey Tarasov

Monday, October 15, 2018, 11:00 am

Hosted by: Ian Robinson

The crystallization behaviour of metallic glass (MG) has long been investigated ever since the discovery of these important functional materials [1]. Compared with crystalline and amorphous extremes, mate-rials containing crystalline precipitates within an otherwise amorphous MG or partially crystallized ma-terials have distinct properties that could be a way of tuning the materials' characteristics. Several methods including powder X-ray diffraction (XRD), transmission electron microscope (TEM) and se-lected area electron diffraction (SAED) are usually combined to characterize the degree of crystalline structure in amorphous materials. Until now, these methods, however, have failed to show the crystal-lization of individual crystal grains in three dimensions. In this work, the in-situ Bragg coherent X-ray diffraction imaging (BCDI) [2, 3] reveals the grain growth and the strain variation of individual crystals up to the sizes of a few hundred nanometers from the pure Fe-based MG powder during heating. We have found that there is preferential growth along one direction during the crystal formation; there is fractal structure around the developing crystal surface; there is also strain relaxation within the growing crystals while cooling. The work supports a two-step crystallization model for the Fe-based MG during heating. This could help to pave the way for designing partially crystalline materials with their at-tendant soft magnetic, anti-corrosive and mechanical properties. References [1] D. H. Kim, W. T. Kim, E. S. Park, N. Mattern, and J. Eckert, Prog. Mater. Sci. 2013, 58, 1103. [2] M. A. Pfeifer, G. J. Williams, I. A. Vartanyants, R. Harder and I. K. Robinson, Nature 2006, 442, 63. [3] I. K. Robinson and R. Harder, Nat. Mater. 2009, 8, 291.

Monday, October 15, 2018, 12:00 pm

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

Bring your bike & enjoy a lunchtime ride! Bike & helmet required! Rain Date is Oct. 30 Tues. No registration is necessary. Note: HealthFest activities are allowable time.

Monday, October 15, 2018, 12:00 pm

Hosted by: QOL/BERA/Recreation

Mindfulness & Meditation. Reduce stress and increase focus, learn techniques to control your thoughts and actions with a meditation guided by Steve Interrante. Berkner - Auditorium on 10/15, Room B on 11/19, Room B on 12/10. Free, open, welcome to come & go as needed.

Tuesday, October 16, 2018, 5:00 pm

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

Table Tennis All Level Tournament Tuesday 10/16, 5 p.m.-9 p.m. Bldg. 317 Rec Hall. To register, email Mike McGuigan at mcguigan@bnl.gov.

Wednesday, October 17, 2018, 2:30 pm

Hosted by: Aaron Meyer

Thursday, October 18, 2018, 12:15 pm

Thursday, October 18, 2018, 3:00 pm

Hosted by: Alessandro Tricoli

Thursday, October 18, 2018, 5:00 pm

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

Table Tennis Masters Tournament Thursday 10/18, 5 p.m.-9 p.m. Bldg. 317 Rec Hall. To register, email Mike Mcguigan at mcguigan@bnl.gov.

Friday, October 19, 2018, 2:00 pm

Hosted by: Chun Shen

Monday, October 22, 2018, 9:30 am

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

Try a BERA Fitness Class for Free all Week! Pilates, Yoga @ 2 levels, Aqua Fit, Kardio Kickboxing, Senior Aqua Fit, and more during the week of Monday-Friday, 10/22-26. Information on fitness classes and aqua-fit classes is here: https://www.bnl.gov/bera/recreation/fitness.asp

Monday, October 22, 2018, 11:30 am

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

Come to the Gym, Pool & Weight Room for a tour and information!

Tuesday, October 23, 2018, 11:30 am

Hosted by: QOL/BERA/Recreation

All levels are welcome to participate in the 400 Yard Healthfest Swim! https://www.bnl.gov/bera/recreation/pool.asp

Tuesday, October 23, 2018, 12:00 pm

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

Try a BERA Fitness Class for Free all Week! Pilates, Yoga @ 2 levels, Aqua Fit, Kardio Kickboxing, Senior Aqua Fit, and more during the week of Monday-Friday, 10/22-26. Information on fitness classes and aqua-fit classes is here: https://www.bnl.gov/bera/recreation/fitness.asp

Wednesday, October 24, 2018, 12:00 pm

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

Try a class for free all week! Information and schedule's here: https://www.bnl.gov/bera/recreation/fitness.asp

Thursday, October 25, 2018, 11:30 am

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

All levels are welcome to participate in the 800 - yard swim. https://www.bnl.gov/bera/recreation/pool.asp

Thursday, October 25, 2018, 12:00 pm

Hosted by: QOL/BERA/Recreation

Try a class for free all week! https://www.bnl.gov/bera/recreation/fitness.asp

Friday, October 26, 2018, 12:00 pm

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

TO REGISTER: https://surveys.bnl.gov/n/healthfest.aspx 5K Run Around the RHIC Ring Friday 10/26, noon. Starts and ends at Bldg. 815 on Renaissance Road. Rain Date is Monday, 10/29. Register Online

Tuesday, October 30, 2018, 3:30 pm

Hosted by: Rob Pisarski

Thermonuclear (Type Ia) supernovae are bright stellar explosions distinguished by light curves that can be calibrated to allow for their use as "standard candles" for measuring cosmological distances. Our research investigates how properties of the host galaxy such as composition and age influence properties of the progenitor system, which in turn influence the thermonuclear burning during an event and thus its brightness. I will present the results from ensembles of simulations addressing the influence of age and composition on the brightness of an event. These results show that the outcome depends sensitively on the nuclear burning, particularly weak interactions. Thus precise measurement of the largest possible scales of the Universe requires accurately capturing physics at some of the smallest scales.

Wednesday, October 31, 2018, 12:00 pm

Hosted by: QOL/BERA/Recreation & Total Worker Wellness

Enjoy a new spin on the HealthFest Walk! Come to the Zombie Walk with lots of tricks & treats along the way! Walk to the Weather Station and back (2 miles) or walk as much or as little as you'd like to walk.

Wednesday, October 31, 2018, 2:30 pm

Hosted by: Gopolang Mohlabeng

Wednesday, October 31, 2018, 2:30 pm

Hosted by: Gopolang Mohlabeng

Thursday, November 1, 2018, 3:00 pm

Hosted by: Chao Zhang

J-PARC KOTO is a dedicated experiment to search for the rare KL→π0νν decay. This decay is special not only because of its direct CP violating process, but also its theoretical cleanness. In the standard model, the branching ratio of KL→π0νν is calculated to be 3×10-11 with only a few percent uncertainty, which provides a clean base to explore new physics through finding deviations from the standard model. In the recently released results of data collected in 2015, the sensitivity of search was improved by an order of magnitude from the previous result and no event was observed in the signal region, with the prediction of 0.4 background event. In this talk, I will report the analysis and DAQ plan toward the sensitivity of O(-11).

Thursday, November 1, 2018, 4:00 pm

Hosted by: Mircea Cotlet

Metal halide perovskites have drawn significant attention because of their ability to deliver high efficiency solar cells. Mixed halide lead perovskites offer a useful strategy for continuous tuning of the semiconductor bandgap. For example, by varying the halide ion composition of methylammonium lead iodide/bromide (CH3NH3PbBr¬xI3-x (x=0 to 3)) it is possible to tune the bandgap between 1.55 eV and 2.43 eV. In addition to photovoltaic applications these mixed halide perovskites offer rich photophysical properties with applications in lasing and optoelectronic devices. An intriguing property of mixed halide lead perovskites (e.g.,CH3NH3PbI3-xBrx) is phase segregation to create iodide-rich and bromide- rich regions under visible irradiation. The halide ion movement in mixed halide films can be tracked from the changes in the photoluminescence and absorption spectra. Photoinduced segregation in mixed halide perovskite has a direct influence on decreasing the solar cell efficiency as segregated I-rich domains serve as charge recombination centers. The recovery of loss in the external quantum efficiency mirrors the dark recovery of the absorption showing the reversibility of the photoinduced halide segregation. Implication of such halide ion migration in mixed halide perovskite solar cell will be discussed. Related Readings 1. Manser, J. S.; Saidaminov, M. I.; Christians, J. A.; Bakr, O. M.; Kamat, P. V., Making and Breaking of Lead Halide Perovskites. Accounts of Chemical Research 2016, 49, 330-338. 2. Manser, J. S.; Christians, J. A.; Kamat, P. V. Intriguing Optoelectronic Properties of Metal Halide Perovskites. Chem. Rev. 2016, 116, 12956–13008. 3. Hoffman, J. B.; Schleper, A. L.; Kamat, P. V., Transformation of Sintered CsPbBr3 Nanocrystals to Cubic CsPbI3 and Gradient CsPbBrxI3–x through Halide Exchange. J. Am. Chem. Soc. 2016, 138, 8603–8611. 4. Draguta, S.; Sharia, O.

Friday, November 2, 2018, 2:00 pm

Hosted by: Andrey Tarasov

Monday, November 5, 2018, 11:00 am

Hosted by: Sanjaya Senanayake

X-ray absorption spectroscopy (XAS) has proven to be a very powerful tool for rationalization of catalytic processes because of the possibility to determine oxidation state and coordination geometry of catalytically active species in operando regime. The seminar will be focused on the advanced facilities for chemical XAS studies available at BM23 and ID24 beamlines of the ESRF synchrotron, which allow to exploit simultaneously a wide range of complementary techniques, make use of flexible sample environment, and obtain high-quality data in the timescale from minutes down to milliseconds. As a case study, recent work on the investigation of the local environment and electronic structure of the active centers of Cu-zeolites in deNOx and methane-to-methanol processes will be discussed.

Wednesday, November 7, 2018, 2:30 pm

Thursday, November 8, 2018, 1:30 pm

Hosted by: Laura Classen

TBA

Wednesday, November 14, 2018, 2:30 pm

Hosted by: Aaron Meyer

Thursday, November 15, 2018, 12:15 pm

Thursday, November 15, 2018, 3:00 pm

Hosted by: Chi-Ting Chang

Monday, November 19, 2018, 12:00 pm

Hosted by: QOL/BERA/Recreation

Mindfulness & Meditation. Reduce stress and increase focus, learn techniques to control your thoughts and actions with a meditation guided by Steve Interrante. Berkner - Room B on 11/19, Room B on 12/10. Free, open, welcome to come & go as needed.

Thursday, November 29, 2018, 3:00 pm

Hosted by: Alessandro Tricoli

The determination of the partonic structure of the proton is a central component of the precision phenomenology program at the Large Hadron Collider (LHC). This internal structure of nucleons is quantified in the collinear QCD factorization framework by the Parton Distribution Functions (PDFs), which encode the probability of finding quarks and gluons inside the proton carrying a given amount of its momentum. PDFs cannot currently be computed from first principles, and therefore they need to be determined from experimental data from a variety of hard-scattering cross-sections in lepton-proton and proton-proton collisions. This program, known as the global QCD analysis, involves combining the most PDF-sensitive data and the highest precision QCD and electroweak calculations available within a statistically robust fitting methodology. In this talk I review our current understanding of the quark and gluon structure of the proton, which emphasis for the implications for precision LHC phenomenology and searches for new physics, but also exploring other aspects of the nucleon structure such as their impact on high-energy neutrino telescopes, the connection with lattice QCD calculations, and the onset of novel small-x dynamics beyond the collinear framework. Finally, I highlight the prospects for improving our understanding of the quark/gluon structure of the nucleon at the high-luminosity LHC era.

Friday, November 30, 2018, 2:00 pm

Hosted by: Andrey Tarasov

Thursday, December 6, 2018, 3:00 pm

Hosted by: Alessandro Tricoli

Thursday, December 6, 2018, 4:00 pm

Hosted by: Don Dimarzo / Mircea Cotlet

TBD

Monday, December 10, 2018, 12:00 pm

Hosted by: QOL/BERA/Recreation

Mindfulness & Meditation. Reduce stress and increase focus, learn techniques to control your thoughts and actions with a meditation guided by Steve Interrante. Berkner Room B on 12/10. Free, open, welcome to come & go as needed.

Thursday, December 20, 2018, 12:15 pm

Thursday, January 10, 2019, 3:00 pm

Hosted by: Alessandro Tricolli

As the standard model (SM) Higgs boson looks increasingly like its SM expectation, expanded tests of the electroweak (EW) sector of the SM are a focal point of the long-term LHC program. Production of massive vector bosons via vector boson scattering provides a direct probe of the self-interactions of the massive vector bosons, which are intimately connected to the Higgs-Englert-Brout mechanism of EW symmetry breaking. A search for vector boson scattering of W and Z bosons has recently been performed by the CMS experiment using data collected in 2016. I will present this search as well as WZ cross section measurements, which are less dependent on theoretical inputs. This process is also sensitive to New Physics in the EW sector. I will present interpretations of these results in terms of explicit models predicting additional charged Higgs bosons and in the generalized framework of dimension-8 effective field theory.