73 research outputs found
Leveraging free carriers effects for infrared photonic structures and devices
No full textIn this work, three types of novel photonic devices/structures were developed. The first one is a metal grating structure that combines the characters of ‘moth-eye’ structure and an extraordinary optical transmission grating. Therefore it has the capability to provide a uniform electrical distribution while simultaneously reducing the optical reflection loss. It can be applied to the active optoelectronic devices which require both optical and electrical access.
The second device is a slot waveguide made with a hybrid doped semi-conductor/metal architecture. Our waveguide takes advantage of the doped semiconductor, which has highly controllable optical response as a designer plasmonic material in the mid-infrared. The local wavelength of the mode that propagates in the waveguide can be expanded at a selected frequency. Therefore the waveguide can function as a photonic wire, which potentially enables the design and fabrication of an integrated metatronic circuit.
The third device is a room-temperature photodetector based on a resonant RF circuit. It consists a microstrip busline and a split-ring resonator that is capacitively coupled to the busline; the RF circuit is built on a semiconductor substrate, with the great flexibility of changing the underlying material system by epitaxial growth. We experimentally investigated the responsivity of this type of detector and concluded that both the material and the geometry will have great impact on the detector response. This detector architecture offers the potential for multiplexing arrays of detectors on a single read-out line; it also can allow us to perform carrier dynamics characterization of semiconductor materials.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-12-01The student, Runyu Liu, accepted the attached license on 2016-11-23 at 13:28.The student, Runyu Liu, submitted this Dissertation for approval on 2016-11-23 at 14:14.This Dissertation was approved for publication on 2016-11-28 at 13:35.DSpace SAF Submission Ingestion Package generated from Vireo submission #10310 on 2017-02-28 at 14:36:43Made available in DSpace on 2017-03-01T16:36:54Z (GMT). No. of bitstreams: 3
LIU-DISSERTATION-2016.pdf: 10986617 bytes, checksum: 60aff26f05a5b09ba07cd89009e045b6 (MD5)
LICENSE.txt: 4206 bytes, checksum: d6d4b8b9e5787f053c8e5fcaebb1d73e (MD5)
PROQUEST_LICENSE.txt: 4552 bytes, checksum: 173fed2c7c737d0398c0702512ac239e (MD5)
Previous issue date: 2016-11-28Embargo set by: Seth Robbins for item 98598
Lift date: 2019-03-01T16:37:19Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 98598 on 2019-03-02T10:15:18Z
Design of multidimensional nanophotonic materials with improved performance and functionalities
No full textMulti-dimensional (2D and 3D) architectures with characteristic feature sizes on the order of a micrometer and below can exhibit extraordinary properties that are not present in their non-structured counterparts. Of particular interest are 3D microstructures, which have been found promising due to their unique photonic, electronic, thermal, and mechanical properties. Due to their unique potential to control the propagation of light in all directions, it is the photonic properties of three-dimensionally microstructure materials, so-called 3D photonic crystals (3D PhCs), that have attracted the greatest amount of attention. Although 3D PhCs have been suggested to have great promise, in practice they have been limited by both the properties of the available constituent materials and difficulties in processing materials with feature sizes small enough to impact visible and near IR wavelengths.
This thesis will thus focus on developing novel techniques to overcome some long-lasting processing challenges in the 3D PhCs community and provide 3D structures that may also be of interest for their electronic, thermal, and mechanical properties. As an overview, in Chapter One we will first introduce the background of PhCs as well as the current achievements and challenges. In Chapters Two to Chapter Four, we will show 1) how a newly developed transfer printing method can be used to enrich the functionalities of 3D PhCs made by holographic lithography (Chapter Two) and 2) how metallic alloy systems may be more interesting than pure metals for 3D metallic PhCs under elevated temperature (Chapter Three & Four). Based on the learnings in these two chapters, we will then continue our discussions in Chapter Five to Chapter Seven on how electrochemical approaches can become powerful in creating novel structures with superior electronic and photonic properties that can potentially lead to a significant improvement in the technology field. Finally, additional to the design of static photonic devices made with solid materials, in Chapter Eight, the design of a new dynamic controllable 3D PhC based on reconfigurable microplasma arrays is simulated and experimentally presented. The unifying theme of this thesis is therefore to build a better understanding of how light and materials with complex structures will interact and make an impact on the development of 3D PhCs as well as other nanophotonic technologies.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01The student, Runyu Zhang, accepted the attached license on 2018-04-16 at 13:19.The student, Runyu Zhang, submitted this Dissertation for approval on 2018-04-16 at 13:36.This Dissertation was approved for publication on 2018-04-17 at 17:03.DSpace SAF Submission Ingestion Package generated from Vireo submission #12275 on 2018-08-31 at 17:19:05Made available in DSpace on 2018-09-04T20:36:35Z (GMT). No. of bitstreams: 4
ZHANG-DISSERTATION-2018.pdf: 5964979 bytes, checksum: f1be1642150d81e48b037baeb0a34fb0 (MD5)
LICENSE.txt: 4208 bytes, checksum: ce9b49b1a09fb8ea793cabc755e87c86 (MD5)
RightsLink Printable License.pdf: 102378 bytes, checksum: d95587ccdc6f2fc477215b8c463b069b (MD5)
Rightslink? by Copyright Clearance Center.pdf: 138178 bytes, checksum: c622ec93464c1962bf7f2df7dd9dc23f (MD5)
Previous issue date: 2018-04-17Embargo set by: Seth Robbins for item 107256
Lift date: 2020-09-04T20:37:00Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 107256
Lift date: 2020-09-04T20:42:08Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 107256 on 2020-09-05T09:15:23Z
Complete Measurement of the Top-quark Polarization in T-channel Single Top-quark Production Using Pp Collisions at 13 TeV with the ATLAS Detector
No full textThe top quarks are undoubtedly one of the most promising and experimentally relevant probes into finding new physics. They can be produced in charged-current electroweak processes via a W tb vertex. Its unique mass scale led to a late discovery in experiment — until 1995 at the Tevatron proton-antiproton collider at Fermilab on the events from top pair production. The observation of the electroweak single top process was established even later — in 2009, also at Fermilab based on 2.3 fb-1 and 3.2 fb-1 of CDF/DØ data. Nowadays, the high energy proton-proton collider — the Large Hardon Collider (LHC), with a data set of 139 fb-1 from the ATLAS detector, makes it possible to perform precision measurements on top quarks using both tt ̄and single top channels.
At the LHC, electroweak production of single top quarks in the t-channel leads, in the standard model, to a high degree of top quark polarization. Two subprocesses, ub ! dt and db ! u ̄t contribute to t-channel production of single top, while the charge-conjugate processes contribute to production of antitop. The top (antitop) quark spin is expected to be polarized along(opposite to) the direction of the light-quark momentum. In this thesis I present a measurement of the top quark polarization produced within a fiducial region of acceptance, using an integrated luminosity 139 fb-1 of proton-proton collisions at 13 TeV, collected by the ATLAS detector. The top decay chain: t->W+b-> l+mu+b, include a lepton, a neutrino and a b quark in the final state, which interact with the ATLAS detector, allowing the top quark to be fully reconstructed. From the angular distribution of the top quark decay products, we obtain all three components of the polarization of both top quarks and top anti-quarks
Angular analyses of t-channel single top production and decay
No full textAngular analyses of t-channel single top production and decay Electroweak production of single top in the t-channel at the LHC yields large samples of polarized top quarks which can be used to accurately constrain the Wtb vertex. This vertex can be parameterized in terms of complex anomalous couplings , , , and , which enter into an effective Lagrangian. A series of analyses carried out with the ATLAS detector aims at improving constraints on these parameters. These are generally based on Fourier techniques in angular variables of the top decay kinematics. Four angles completely describe the kinematics of production of single top in the t-channel and its subsequent semileptonic decay. An analysis of a double-differential single top decay rate based on 4.6 fb of proton-proton collisions at 7 TeV uses spherical harmonics as the basis functions in an angular analysis. A followup analysis based on 20.2 fb of data at 8 TeV of the triple differential decay rate uses higher orthogonal functions designated as -functions of three angles for a more complete characterization of the Wtb vertex. This poster compares these analyses and discusses the phenomenological basis of an analysis of the quadruple differential rate of production and decay of top quarks in the t-channel, using -functions of four angles, which can be applied to the 13 TeV datasets presently available
Robust electron spin qubit control in a nanowire double quantum dot
No full textPublisher Copyright: © 2022 The Author(s).Robust and efficient manipulation of electron spin qubits in quantum dots is of great significance for the reliable realization of quantum computers and execution of quantum algorithms. In this paper, we study the robust control on a singlet-triplet qubit based on inverse engineering, one technique of shortcuts to adiabaticity (STA), in a nanowire double quantum dot in the presence of magnetic field and strong spin-orbit coupling. The optimization of STA with respect to the systematic errors, contributed from the control field and the perturbative interaction, is explored. Moreover, we also apply optimal control techniques combining with STA, referred to as robust inverse optimization, to design optimal control fields and optimal operation time. This article is part of the theme issue 'Shortcuts to adiabaticity: theoretical, experimental and interdisciplinary perspectives'.We acknowledge financial support from National Natural Science Foundation of China, grant no. 12075145 and the QUANTEK project (ELKARTEK program from the Basque Government, expedient no. KK-2021/00070). AcknowledgementsPeer reviewe
Author Correction: Charge stripe manipulation of superconducting pairing symmetry transition
No full textEarly animal evolution and highly oxygenated seafloor niches hosted by microbial mats
No full text© 2019, The Author(s). The earliest unambiguous evidence for animals is represented by various trace fossils in the latest Ediacaran Period (550–541 Ma), suggesting that the earliest animals lived on or even penetrated into the seafloor. Yet, the O2 fugacity at the sediment-water interface (SWI) for the earliest animal proliferation is poorly defined. The preferential colonization of seafloor as a first step in animal evolution is also unusual. In order to understand the environmental background, we employed a new proxy, carbonate associated ferrous iron (Fecarb), to quantify the seafloor oxygenation. Fecarb of the latest Ediacaran Shibantan limestone in South China, which yields abundant animal traces, ranges from 2.27 to 85.43 ppm, corresponding to the seafloor O2 fugacity of 162 μmol/L to 297 μmol/L. These values are significantly higher than the oxygen saturation in seawater at the contemporary atmospheric pO2 levels. The highly oxygenated seafloor might be attributed to O2 production of the microbial mats. Despite the moderate atmospheric pO2 level, microbial mats possibly provided highly oxygenated niches for the evolution of benthic metazoans. Our model suggests that the O2 barrier could be locally overcome in the mat ground, questioning the long-held belief that atmospheric oxygenation was the key control of animal evolution
Hydrogenation of dimethyl carbonate to methanol by trans -[Ru(H) 2(PNN)(CO)] catalysts: DFT evidence for ion-pair-mediated metathesis paths for C-OMe bond cleavage
No full textMilstein and co-workers have reported that the pincer complexes trans-[Ru(H)2(PNN)(CO)] catalyze the unprecedented homogeneous hydrogenation of dimethyl carbonate to methanol. A mechanism for this reaction was proposed on the basis of (i) carbonyl group insertion into one of the Ru-H bonds to produce the six-coordinate trans-[Ru(OCH(OMe)2)(H)(PNN)(CO)] intermediate and (ii) a metal-ligand cooperative transformation, involving proton transfer from the phosphine arm of the PNN ligand to a methoxy group of the Ru-coordinated [OCH(OMe)2]- anion along with cleavage of a C-OMe bond, to produce methanol and an O-bound methyl formate complex of the dearomatized square-pyramidal form of the catalyst, [Ru(H)(PNN)(CO)]. We investigate herein the possibility of an alternative reaction pathway proceeding as (i) an outer-sphere hydride transfer from [Ru(H)2(PNN)(CO)] to the carbonyl of dimethyl carbonate to give an ion pair of the cationic metal fragment and the [OCH(OMe)2]- anion in which the C-H bond is facing the metal center, (ii) reorientation of the [OCH(OMe) 2]- anion within the intact ion pair to coordinate a methoxy group to the metal, and (iii) C-OMe bond cleavage (methoxide abstraction by the cationic ruthenium center) to yield methyl formate and trans-[Ru(H)(OMe)(PNN)(CO)]. Using DFT calculations applied at the M06 and ωB97X-D levels with a polarizable continuum representing THF as solvent, we calculate the energy profile of this pathway to be significantly lower than the metal-ligand cooperative pathway. The analogous pathway is also favored for the reaction of [Ru(H)2(PNN)(CO)] with methyl formate. The new mechanism corresponds to a direct metathesis transformation in which a hydride and an alkoxide are exchanged between a metal center and a carbonyl group via an outer sphere ion pair formation and reorientation of the alkoxide anion. The calculations also indicate that the metathesis can proceed indirectly via outer sphere ion pair mediated carbonyl insertion of dimethyl carbonate and methyl formate to give [Ru(H)(OCH(OMe)2)(PNN)(CO)] and [Ru(H)(OCH 2OMe)(PNN)(CO)], respectively, as intermediates, followed by ion pair mediated deinsertion of methyl formate or formaldehyde. Inclusion of one methanol molecule as an explicit H-bond donor solvent does not change the main conclusions of the study. © 2013 American Chemical Society.Abdur-Rashid K, 2001, J AM CHEM SOC, V123, P7473, DOI 10.1021-ja015902u; Abdur-Rashid K, 2002, J AM CHEM SOC, V124, P15104, DOI 10.1021-ja016817p; Adamo C, 1998, J CHEM PHYS, V108, P664, DOI 10.1063-1.475428; APPLETON TG, 1973, COORDIN CHEM REV, V10, P335, DOI 10.1016-S0010-8545(00)80238-6; APPLETON TG, 1985, INORG CHEM, V24, P4685, DOI 10.1021-ic00220a051; APPLETON TG, 1978, INORG CHEM, V17, P738, DOI 10.1021-ic50181a048; Arunachalampillai A, 2012, POLYHEDRON, V32, P24, DOI 10.1016-j.poly.2011.08.028; Averkiev BB, 2011, CATAL SCI TECHNOL, V1, P1526, DOI 10.1039-c1cy00227a; Backvall J.-E., 2006, CHEM SOC REV, V35, P237; Balaraman E, 2011, NAT CHEM, V3, P609, DOI [10.1038-nchem.1089, 10.1038-NCHEM.1089]; Balaraman E, 2010, J AM CHEM SOC, V132, P16756, DOI 10.1021-ja1080019; Balaraman E, 2013, NAT CHEM, V5, P122, DOI [10.1038-nchem.1536, 10.1038-NCHEM.1536]; Balaraman E, 2011, ANGEW CHEM INT EDIT, V50, P11702, DOI 10.1002-anie.201106612; Ballico M., 2008, CHEM-EUR J, V14, P558; Baratta W, 2006, ORGANOMETALLICS, V25, P4611, DOI 10.1021-om060408q; Baratta W, 2007, CHEM-EUR J, V13, P7479, DOI 10.1002-chem.200700507; Baratta W, 2005, ANGEW CHEM INT EDIT, V44, P6214, DOI 10.1002-anie.200502118; Basolo F., 1962, PROG INORG CHEM, V4, P381, DOI 10.1002-9780470166055.ch6; BECKE AD, 1993, J CHEM PHYS, V98, P1372, DOI 10.1063-1.464304; BENNAIM A, 1984, J CHEM PHYS, V81, P2016, DOI 10.1063-1.447824; Bertoli M, 2011, ORGANOMETALLICS, V30, P3479, DOI 10.1021-om200437n; Bhaduri S., 2000, HOMOGENEOUS CATALYSI; Blum O, 2000, J ORGANOMET CHEM, V593, P479, DOI 10.1016-S0022-328X(99)00619-1; BLUM Y, 1985, ORGANOMETALLICS, V4, P1459, DOI 10.1021-om00127a027; BURN MJ, 1995, ORGANOMETALLICS, V14, P137, DOI 10.1021-om00001a023; Casey CP, 2005, J AM CHEM SOC, V127, P3100, DOI 10.1021-ja043460r; Centi G, 2013, ENERG ENVIRON SCI, V6, P1711, DOI 10.1039-c3ee00056g; Chai JD, 2008, PHYS CHEM CHEM PHYS, V10, P6615, DOI 10.1039-b810189b; Chen HYT, 2012, DALTON T, V41, P1867, DOI 10.1039-c1dt11244a; Chen HYT, 2011, DALTON T, V40, P402, DOI 10.1039-c0dt00820f; Chen Y, 2007, J AM CHEM SOC, V129, P10773, DOI 10.1021-ja072203u; Clapham SE, 2004, COORDIN CHEM REV, V248, P2201, DOI 10.1016-j.ccr.2004.04.007; Clapham SE, 2006, ORGANOMETALLICS, V25, P5477, DOI 10.1021-om060661q; Coe BJ, 2000, COORDIN CHEM REV, V203, P5, DOI 10.1016-S0010-8545(99)00184-8; Cossi M., 2002, CHEM PHYS, V117, P43; Dang L, 2012, J PHYS CHEM A, V116, P476, DOI 10.1021-jp205971b; Darensbourg D. J., 2013, EUR J INORG CHEM, P4024; DARENSBOURG DJ, 1981, J AM CHEM SOC, V103, P3223, DOI 10.1021-ja00401a055; DARENSBOURG DJ, 1985, J AM CHEM SOC, V107, P7463, DOI 10.1021-ja00311a040; DARENSBOURG DJ, 1987, J AM CHEM SOC, V109, P290, DOI 10.1021-ja00235a054; de Vries J. G., 2007, HDB HOMOGENEOUS HYDR; Deng LQ, 1997, J AM CHEM SOC, V119, P6177, DOI 10.1021-ja970226a; Dobereiner GE, 2010, CHEM REV, V110, P681, DOI 10.1021-cr900202j; Dub PA, 2012, ACS CATAL, V2, P1718, DOI 10.1021-cs300341g; EHLERS AW, 1993, CHEM PHYS LETT, V208, P111, DOI 10.1016-0009-2614(93)80086-5; Eisenstein O, 2013, NEW J CHEM, V37, P21, DOI 10.1039-c2nj40659d; Fafard CM, 2007, INORG CHIM ACTA, V360, P286, DOI 10.1016-j.ica.2006.07.067; Fan L, 1996, INORG CHEM, V35, P4003, DOI 10.1021-ic950738v; Ferreira DAC, 2011, J BRAZIL CHEM SOC, V22, P428, DOI 10.1590-S0103-50532011000300004; Findlater M, 2010, J AM CHEM SOC, V132, P4534, DOI 10.1021-ja100168w; Frisch M. J., 2009, GAUSSIAN 09 REV A 02; Froese RDJ, 1998, J AM CHEM SOC, V120, P1581, DOI 10.1021-ja9728334; Gnanaprakasam B, 2012, J POLYM SCI POL CHEM, V50, P1755, DOI 10.1002-pola.25943; Gnanaprakasam B, 2010, ADV SYNTH CATAL, V352, P3169, DOI 10.1002-adsc.201000663; Gribble GW, 1998, CHEM SOC REV, V27, P395; Grimme S, 2006, J COMPUT CHEM, V27, P1787, DOI 10.1002-jcc.20495; Gunanathan C, 2011, ACCOUNTS CHEM RES, V44, P588, DOI 10.1021-ar2000265; Gunanathan C, 2007, SCIENCE, V317, P790, DOI 10.1126-science.1145295; Gunanathan C, 2011, TOP ORGANOMETAL CHEM, V37, P55, DOI 10.1007-3418_2011_6; Hadzovic A, 2007, ORGANOMETALLICS, V26, P5987, DOI 10.1021-om700849w; Hamilton RJ, 2006, J AM CHEM SOC, V128, P13700, DOI 10.1021-ja065460s; Hamilton RJ, 2005, J AM CHEM SOC, V127, P4152, DOI 10.1021-ja043339k; Hamilton RJ, 2008, J AM CHEM SOC, V130, P11979, DOI 10.1021-ja8034812; Handgraaf JW, 2007, J AM CHEM SOC, V129, P3099, DOI 10.1021-ja062359e; Hartwig J., 2010, ORGANOTRANSITION MET, P575; Hasanayn F, 2012, ORGANOMETALLICS, V31, P4680, DOI 10.1021-om300001n; Hasanayn F, 2010, INORG CHEM, V49, P9162, DOI 10.1021-ic100198u; Hasanayn F, 2012, INORG CHEM, V51, P10808, DOI 10.1021-ic301233j; Hasanayn F, 2013, ORGANOMETALLICS, V32, P2493, DOI 10.1021-om400122n; Hay P. J., 1985, J CHEM PHYS, V82, P279; Haynes A, 2009, INORG CHEM, V48, P28, DOI 10.1021-ic8017858; Hedberg C, 2005, J AM CHEM SOC, V127, P15083, DOI 10.1021-ja051920q; Hehre J.W., 1986, AB INITIO MOL ORBITA; Hermans J, 1997, J AM CHEM SOC, V119, P2707, DOI 10.1021-ja963568+; Heyndrickx W, 2011, CHEM-EUR J, V17, P14628, DOI 10.1002-chem.201101152; Huff CA, 2011, J AM CHEM SOC, V133, P18122, DOI 10.1021-ja208760j; Huff CA, 2013, CHEM COMMUN, V49, P7147, DOI 10.1039-c3cc43517b; Huff CA, 2012, ORGANOMETALLICS, V31, P4643, DOI 10.1021-om300403b; Ikariya T., 2013, J AM CHEM SOC, V135, P2605; Ito M, 2011, J AM CHEM SOC, V133, P4240, DOI 10.1021-ja1117254; Kelly CP, 2006, J PHYS CHEM B, V110, P16066, DOI 10.1021-jp063552y; Kloek SM, 2006, ORGANOMETALLICS, V25, P3007, DOI 10.1021-om051098z; Knowles WS, 2007, ACCOUNTS CHEM RES, V40, P1238, DOI 10.1021-ar7000809; Krug C, 2004, ORGANOMETALLICS, V23, P4594, DOI 10.1021-om0496582; Krug C, 2002, J AM CHEM SOC, V124, P1674, DOI 10.1021-ja017401e; Kundu S, 2009, ORGANOMETALLICS, V28, P5432, DOI 10.1021-om900568f; Kuniyasu H, 2013, ORGANOMETALLICS, V32, P2026, DOI 10.1021-om400157a; Kuriyama W., 2011, CHEM COMMUN, P62, Patent No. WO2011048727A1; Langer R, 2012, CHEM-EUR J, V18, P7196, DOI 10.1002-chem.201200159; Langer R, 2011, ANGEW CHEM INT EDIT, V50, P9948, DOI 10.1002-anie.201104542; Li HX, 2011, ORGANOMETALLICS, V30, P5233, DOI 10.1021-om200620n; Li HX, 2012, INORG CHEM, V51, P5716, DOI 10.1021-ic300175b; Lopes PEM, 2009, THEOR CHEM ACC, V124, P11, DOI 10.1007-s00214-009-0617-x; MCLEAN AD, 1980, J CHEM PHYS, V72, P5639, DOI 10.1063-1.438980; Milstein D, 2010, TOP CATAL, V53, P915, DOI 10.1007-s11244-010-9523-7; Montag M, 2012, J AM CHEM SOC, V134, P10325, DOI 10.1021-ja303121v; Noyori R., 1994, ASYMMETRIC CATALYSIS; Noyori R, 2002, ANGEW CHEM INT EDIT, V41, P2008, DOI 10.1002-1521-3773(20020617)41:122008::AID-ANIE20083.0.CO;2-4; Noyori R., 2008, APPL HOMOGENEOUS CAT; Noyori R, 1997, ACCOUNTS CHEM RES, V30, P97, DOI 10.1021-ar9502341; Olah G.A., 2006, OIL GAS METHANOL EC; OSBORN JA, 1966, J CHEM SOC A, P1711, DOI 10.1039-j19660001711; Perdew JP, 1996, PHYS REV LETT, V77, P3865, DOI 10.1103-PhysRevLett.77.3865; Poverenov E, 2013, TOP ORGANOMETAL CHEM, V40, P21, DOI 10.1007-978-3-642-31081-2_2; Prokopchuk DE, 2012, ORGANOMETALLICS, V31, P7375, DOI 10.1021-om300572v; Raghavachari K., 1980, J CHEM PHYS, V72, P650, DOI DOI 10.1063-1.438955; Rassolov VA, 2001, J COMPUT CHEM, V22, P976, DOI 10.1002-jcc.1058.abs; Romero PE, 2008, ORGANOMETALLICS, V27, P3422, DOI 10.1021-om8003515; Runyu H., 1997, J AM CHEM SOC, V119, P8135; Sakakura T, 2007, CHEM REV, V107, P2365, DOI 10.1021-cr068357u; Sakakura T., 2009, CHEM COMMUN, V45, P1312; Salem H, 2009, ORGANOMETALLICS, V28, P4791, DOI 10.1021-om9004077; Sandoval CA, 2003, J AM CHEM SOC, V125, P13490, DOI 10.1021-ja030272c; Saudan L., 2006, ACS CATAL, Patent No. WO 2006106484; Schmeier TJ, 2011, J AM CHEM SOC, V133, P9274, DOI 10.1021-ja2035514; Seyden-Penne J., 1997, REDUCTIONS ALUMINO B; Smythe NA, 2009, ORGANOMETALLICS, V28, P277, DOI 10.1021-om800905q; Spasyuk D, 2013, ANGEW CHEM INT EDIT, V52, P2538, DOI 10.1002-anie.201209218; Spasyuk D, 2012, ORGANOMETALLICS, V31, P5239, DOI 10.1021-om300670r; Stromberg S., 1997, DALTON T, P4147; Svensson M, 1996, ORGANOMETALLICS, V15, P5568, DOI 10.1021-om960535u; Takebayashi S, 2011, J AM CHEM SOC, V133, P9666, DOI 10.1021-ja202732q; Takebayashi S, 2009, ORGANOMETALLICS, V28, P2349, DOI 10.1021-om9002076; Tissandier MD, 1998, J PHYS CHEM A, V102, P7787, DOI 10.1021-jp982638r; Tomasid J, 1994, CHEM REV, V94, P2027; Trost B. M., 1991, COMPREHENSIVE ORGANI, V8; Vogt M, 2012, CHEM-EUR J, V18, P9194, DOI 10.1002-chem.201201730; Weinhold F, 2005, VALENCY BONDING NATU; Whittlesey MK, 1996, ORGANOMETALLICS, V15, P5166, DOI 10.1021-om960588b; WIBERG KB, 1994, J AM CHEM SOC, V116, P11067, DOI 10.1021-ja00103a024; Yang XZ, 2012, ACS CATAL, V2, P964, DOI 10.1021-cs3000683; Zell T, 2013, CHEM-EUR J, V19, P8068, DOI 10.1002-chem.201301383; Zeng GX, 2011, INORG CHEM, V50, P10572, DOI 10.1021-ic200205e; Zeng HX, 2011, J AM CHEM SOC, V133, P1159, DOI 10.1021-ja106958s; Zhang J, 2006, ANGEW CHEM INT EDIT, V45, P1113, DOI 10.1002-anie.200503771; Zhang J, 2005, J AM CHEM SOC, V127, P10840, DOI 10.1021-ja052862b; Zhang X, 2012, PHYS CHEM CHEM PHYS, V14, P6003, DOI 10.1039-c2cp23936a; Zhao Y, 2009, J CHEM THEORY COMPUT, V5, P324, DOI 10.1021-ct800386d; Zhao Y, 2006, J CHEM PHYS, V125, DOI 10.1063-1.2370993; Zhao Y, 2011, CHEM PHYS LETT, V502, P1, DOI 10.1016-j.cplett.2010.11.060; Zhao Y, 2008, THEOR CHEM ACC, V120, P215, DOI 10.1007-s00214-007-0310-x; Zimmer-De Iuliis Marco, 2009, J Am Chem Soc, V131, P11263, DOI 10.1021-ja904310427
Measurement of cross-sections for production of a boson in association with a flavor-inclusive or doubly -tagged large-radius jet in proton-proton collisions at TeV with the ATLAS experiment
No full textWe present measurements of cross-sections for production of a leptonically
decaying boson in association with a large-radius jet in 13 TeV
proton-proton collisions at the LHC, using of data from
the ATLAS detector. Integrated and differential cross-sections are measured at
particle-level in both a flavor-inclusive and a doubly -tagged fiducial
phase-space. The large-radius jet mass and transverse momentum, its kinematic
relationship to the boson, and the angular separation of -tagged
small-radius track-jets within the large-radius jet are measured. This
measurement constitutes an important test of perturbative quantum
chromodynamics in kinematic and flavor configurations relevant to several Higgs
boson and beyond-Standard-Model physics analyses. The results highlight issues
with modeling of additional hadronic activity in the flavor-inclusive
selection, and a distinction between flavor-number schemes in the -tagged
phase-space.Comment: 44 pages in total, author list starting page 27, 5 figures, 2 tables,
published as Phys. Rev. D. 108 (2023) 1, 012022. All figures including
auxiliary figures are available at
https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-37
Measurement of the c-jet mistagging efficiency in events using pp collision data at collected with the ATLAS detector
No full textInternational audienceA technique is presented to measure the efficiency with which c-jets are mistagged as b-jets (mistagging efficiency) using events, where one of the W bosons decays into an electron or muon and a neutrino and the other decays into a quark–antiquark pair. The measurement utilises the relatively large and known branching ratio, which allows a measurement to be made in an inclusive c-jet sample. The data sample used was collected by the ATLAS detector at and corresponds to an integrated luminosity of 139 fb. Events are reconstructed using a kinematic likelihood technique which selects the mapping between jets and decay products that yields the highest likelihood value. The distribution of the b-tagging discriminant for jets from the hadronic W decays in data is compared with that in simulation to extract the mistagging efficiency as a function of jet transverse momentum. The total uncertainties are in the range 3–17%. The measurements generally agree with those in simulation but there are some differences in the region corresponding to the most stringent b-jet tagging requirement
- …
