Author(s): D. Di Castro, C. Cantoni, F. Ridolfi, C. Aruta, A. Tebano, N. Yang, and G. BalestrinoCaCuO2/SrTiO3 heterostructures show interface superconductivity at 40K due to extra oxygen ions in the interface Ca plane, which act as doping holes.[Phys. …
Sensing Polymer Chain Dynamics through Ring Topology: A Neutron Spin Echo Study
Author(s): Sebastian Gooßen, Margarita Krutyeva, Melissa Sharp, Artem Feoktystov, Jürgen Allgaier, Wim Pyckhout-Hintzen, Andreas Wischnewski, and Dieter Richter
Ring-shaped polymers have been used to detect a theoretical tube that restricts the motion of molten polymer chains.
[Phys. Rev. Lett. 115, 148302] Published Mon Sep 28, 2015
How Rosetta’s comet got its shape
Two comets collided at low speed in the early Solar System to give rise to the distinctive ‘rubber duck’ shape of Comet 67P/Churyumov–Gerasimenko, say Rosetta scientists.
When black holes collide
Space science image of the week: A simulation of gravitational radiation rippling away from a pair of colliding black holes
Liquid water still flows on Mars
Researchers detected signatures of hydrated minerals on slopes where mysterious streaks are seen on the Red Planet.
Black hole is 30 times expected size
Thought to be at least 9 billion years old, it contains an active galactic nucleus, an incredibly bright object resulting from the accretion of gas by a central supermassive black hole.
Improve the Station tour
Have you been exploring the International Space Station in our panoramic tour? Tell us what you think and how it could be improved
Opportunity Mars Rover Preparing for Active Winter
NASA’s Opportunity Mars rover will soon move to a position that will help the sun-powered robot keep active through the Martian winter.
Principia
Read about ESA astronaut Tim Peake’s Principia mission
Identifying Exotic Hidden-Charm Pentaquarks
Author(s): Rui Chen, Xiang Liu, Xue-Qian Li, and Shi-Lin ZhuThe pentaquarks discovered by the LHCb Collaboration could be molecular bound states of a charmed baryon and a meson. Observing the predicted isospin partners would allow for this interpretati…
Observation of a Helical Luttinger Liquid in InAs/GaSb Quantum Spin Hall Edges
Author(s): Tingxin Li, Pengjie Wang, Hailong Fu, Lingjie Du, Kate A. Schreiber, Xiaoyang Mu, Xiaoxue Liu, Gerard Sullivan, Gábor A. Csáthy, Xi Lin, and Rui-Rui Du
Strong electron-electron interactions are observed in one dimensional InAs/GaSb quantum spin Hall insulators.
[Phys. Rev. Lett. 115, 136804] Published Fri Sep 25, 2015
Week In Images
Our week through the lens: 21-25 September 2015
Space for safer cars
A spacecraft tool is now improving car safety by stress-testing many of the internal computer systems to be sure they work well when the car is on the road.
Opportunity Mars rover preparing for active winter
Rover operators plan to use the vehicle through the upcoming martian winter and beyond to study outcrops bearing clay minerals.
Eleven-year cosmic search leads to black hole rethink
The fact that gravitational waves weren’t detected goes against theoretical expectations and throws our current understanding of black holes into question.
Galileo satellites handed over to operator
Europe’s latest pair of Galileo satellites has passed its initial check out in space, allowing control to be handed over to the main control centre and join the growing fleet.
Two-photon quantum interference for an undergraduate lab
We present a simple setup allowing undergraduate students to reproduce the Hong–Ou–Mandel experiment
during a half-day labwork session and observe the coalescence of two indistinguishable photons
merging on a balanced beamsplitter. This two-photo…
Subtleties of the clock retardation
For a simple electromagnetic model of a clock introduced by Jefimenko (clock # 1 in 1996 Am. J.
Phys. 64 812), a change of the rate of the clock when it is set in uniform motion is calculated
exactly, employing the correct equation of motion of a cha…
Lorentz covariance ‘almost’ implies electromagnetism and more
Beginning from two simple assumptions, (i) the speed of light is a universal constant, or its
equivalent, the spacetime intervals are Lorentz invariant, and (ii) there are mutually interacting
particles, with a covariant ‘source-field’ equation, …
NASA to Announce Mars Mystery Solved
NASA will detail a major science finding from the agency’s ongoing exploration of Mars during a news briefing at 8:30 a.m. PDT (11:30 a.m. EDT) on Monday, Sept. 28.
Nanofluidic Diode for Simple Fluids without Moving Parts
Author(s): Long Li, Jingwen Mo, and Zhigang Li
An array of nanochannels—made from a mixture of hydrophobic and hydrophilic materials—acts as a one-way diode for fluids.
[Phys. Rev. Lett. 115, 134503] Published Thu Sep 24, 2015
Local Spectroscopic Characterization of Spin and Layer Polarization in WSe_{2}
Author(s): Matthew Yankowitz, Devin McKenzie, and Brian J. LeRoyTunneling spectroscopy exhibits suppression of intervalley electronic scattering in the valence band of a monolayer of the transition metal dichalcogenide WSe2.[Phys. Rev. Lett. 115, 13680…
Toimus e-õpikuid käsitleva projekti LEARNMIX lõpukonverents
Ilmselgelt on e-õpikute teemal joonistatud sektordiagrammide hulk viimasel ajal eksponentsiaalselt kasvanud. Riik on asjal tugevamalt sarvist võtnud, loob eKoolikotti, kirjastused arendavad oma veebiplatvorme, lisaks sellele kirev seltskond omaalgatuslikku tegevust. Rääkimata laias maailmas toimuvatest arengutest. Konverentsi materjale sirvides saab kõigest sellest aimu. Tallinna Ülikool on selle protsessis HTM, HITSA jt asutuste koostööpartner ja nõustaja Eestis. LEARNMIX oli […]
Forty years of European space tracking
Today, ESA celebrates the 40th anniversary of the Agency’s ground station network, the indispensable link to spacecraft that are helping us to learn about our planet, our Solar System and our Universe.
Perplexing Pluto: New “snakeskin” image and more from New Horizons
It’s a unique and perplexing landscape stretching over hundreds of miles.
Rosetta reveals comet’s water-ice cycle
Underground water vapor reaches the comet’s cold surface and freezes again, blanketing that patch of surface with a thin layer of fresh ice.
Ground station chillax
The winning entry in the #Estrack40 audio contest is now the official theme music for ESA’s ground station network
Rosetta reveals comet’s water-ice cycle
ESA’s Rosetta spacecraft has provided evidence for a daily water-ice cycle on and near the surface of comets.
Low Speed Crack Propagation via Kink Formation and Advance on the Silicon (110) Cleavage Plane
Author(s): James R. Kermode, Anna Gleizer, Guy Kovel, Lars Pastewka, Gábor Csányi, Dov Sherman, and Alessandro De Vita
A thermally activated fracture process can occur in silicon without bonds breaking at the crack tip. For such a process cracks can propagate at speeds well below 2000 ms^{-1}, which were previously thought to be ‘forbidden’.
[Phys. Rev. Lett. 115, 135501] Published Wed Sep 23, 2015
Precision Spectroscopy in Cold Molecules: The Lowest Rotational Interval of He_{2} ^{+} and Metastable He_{2}
Author(s): Paul Jansen, Luca Semeria, Laura Esteban Hofer, Simon Scheidegger, Josef A. Agner, Hansjürg Schmutz, and Frédéric Merkt
The experimental accuracy needed to reveal quantum-electrodynamics corrections in a three-electron molecule is achieved. These measurements represent a benchmark and test for future ab initio calculations.
[Phys. Rev. Lett. 115, 133202] Published Wed Sep 23, 2015
Oxygen in Earth’s core gives new view of planetary formation
There is more oxygen in Earth’s core than originally thought.
Milky Way’s black hole shows signs of increased chatter
Scientists are trying to learn whether this is normal behavior that was unnoticed due to limited monitoring or these flares are triggered by the recent close passage of a mysterious dusty object.
Light-Matter Interaction at Surfaces in the Spatiotemporal Limit of Macroscopic Models
Author(s): M. Lucchini, L. Castiglioni, L. Kasmi, P. Kliuiev, A. Ludwig, M. Greif, J. Osterwalder, M. Hengsberger, L. Gallmann, and U. KellerThe angular dependence of photoemission from a copper surface, irradiated with an infra-red light pulse, is wel…
Cavity State Manipulation Using Photon-Number Selective Phase Gates
Author(s): Reinier W. Heeres, Brian Vlastakis, Eric Holland, Stefan Krastanov, Victor V. Albert, Luigi Frunzio, Liang Jiang, and Robert J. SchoelkopfA new quantum gate can control the phase of a quantum state and create a high fidelity single photon Fo…
Decoherence of Impurities in a Fermi Sea of Ultracold Atoms
Author(s): Marko Cetina, Michael Jag, Rianne S. Lous, Jook T. M. Walraven, Rudolf Grimm, Rasmus S. Christensen, and Georg M. Bruun
The superposition of internal states of impurity atoms in a strongly interacting Fermi gas decohere an order of magnitude faster than predictions that assume this process occurs via quasiparticle scattering.
[Phys. Rev. Lett. 115, 135302] Published Tue Sep 22, 2015
Astronomers identify a new mid-sized black hole
A new study strengthens the case for the existence of a third major class of black holes.
Semiconducting Graphene from Highly Ordered Substrate Interactions
Author(s): M. S. Nevius, M. Conrad, F. Wang, A. Celis, M. N. Nair, A. Taleb-Ibrahimi, A. Tejeda, and E. H. Conrad
Researchers have engineered a large energy band gap in a graphene layer grown on a silicon carbide substrate.
[Phys. Rev. Lett. 115, 136802] Published Mon Sep 21, 2015
Orbital Feshbach Resonance in Alkali-Earth Atoms
Author(s): Ren Zhang, Yanting Cheng, Hui Zhai, and Peng ZhangA scheme is proposed to realize a new type of Feshbach resonance between two atoms with different orbital and nuclear spin quantum numbers.[Phys. Rev. Lett. 115, 135301] Published Mon Sep 21,…
Pairs of galactic supermassive black holes five times rarer than previously thought
Potentially prime sources of gravitational waves, supermassive black hole pairs may not be as common as astronomers predict.
Pioneering dark energy instrument achieves its next major milestone
DESI will measure the redshifts of more than 30 million galaxies and quasars with unprecedented precision. And, if approved, the instrument will give new life to Kitt Peak National Observatory’s iconic Mayall telescope.
2015.a. EFS Täppisteaduste Sügiskool toimub 30.oktoobril – 1. novembril Voore Puhkekeskuses
2015.a. EFS Täppisteaduste Sügiskool toimub 30.oktoobril – 1. novembril Voore PuhkekeskusesKõik noored täppisteadlased ja sellest huvitatud tudengid ning gümnasistid on oodatud Eesti Füüsika Seltsi poolt korraldatavasse Täppisteaduste Sügiskooli, mis toimub 30. oktoobril – 1. novembril Jõgevamaal Voore puhkekeskuses. Sügiskool on iga-aastane kolmepäevane seminar eesmärgiga avardada osalejate silmaringi täppisteadustes toimuva kohta. Kokku saavad nii noored teadushuvilised, […]
ExoMars 2016 targets March launch window
A problem recently discovered in two sensors in the propulsion system of the entry, descent and landing demonstrator module has prompted the recommendation to move the launch of the ExoMars 2016 mission, initially foreseen in January, to M…
Dispersion Distance and the Matter Distribution of the Universe in Dispersion Space
Author(s): Kiyoshi Wesley Masui and Kris SigurdsonAnalysis of radio pulses from very distant objects may offer a new way to map the Universe.[Phys. Rev. Lett. 115, 121301] Published Fri Sep 18, 2015
Hubble observes galaxies’ evolution in slow motion
NGC 3921 is an interacting pair of disk galaxies in the late stages of its merger.
Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment
Author(s): N. Agafonova et al. (OPERA Collaboration)
OPERA experiment crosses “5 sigma” threshold for detection of muon neutrinos turning into tau neutrinos.
[Phys. Rev. Lett. 115, 121802] Published Thu Sep 17, 2015
Big Iron gets technology boost
ESA deploys ‘big iron’ to communicate with its deep-space missions: three 35 m-diameter dishes employing some of the world’s most advanced tracking technology. And it’s about to get a boost.
ESA’s three Deep Space Antenna stations at New Norcia, Australia, Cebreros, Spain and Malargüe, Argentina, beam commands and receive data from spacecraft voyaging hundreds of millions of kilometres into our Solar System.
Funky light signal from colliding black holes explained
The researchers found that one of the black holes is gobbling up more matter than the other, and this process heats up matter that emits energetic light.
Pluto’s glaciers look stunning in latest backlit shots from New Horizons
Pluto’s flowing ice is downright Earth-like in these freshly downloaded images from New Horizons. But instead of water, the dwarf planet’s hydrological cycle appears driven by soft and exotic ices like nitrogen.
Funky Light Signal From Colliding Black Holes Explained
A dance between two candidate black holes is yielding some high-speed secrets.
Observation of the Zero Hall Plateau in a Quantum Anomalous Hall Insulator
Author(s): Yang Feng, Xiao Feng, Yunbo Ou, Jing Wang, Chang Liu, Liguo Zhang, Dongyang Zhao, Gaoyuan Jiang, Shou-Cheng Zhang, Ke He, Xucun Ma, Qi-Kun Xue, and Yayu WangConductivity features of thin film topological insulators suggest a profound differe…
Electrical Tuning of Exciton Binding Energies in Monolayer WS_{2}
Author(s): Alexey Chernikov, Arend M. van der Zande, Heather M. Hill, Albert F. Rigosi, Ajanth Velauthapillai, James Hone, and Tony F. HeinzAn externally applied voltage in a transistor device can continuously tune the binding energy of excitons in mon…
Coulomb Bound States of Strongly Interacting Photons
Author(s): M. F. Maghrebi, M. J. Gullans, P. Bienias, S. Choi, I. Martin, O. Firstenberg, M. D. Lukin, H. P. Büchler, and A. V. Gorshkov
Rydberg atoms can be used to mediate an effective Coulomb interaction between photons, according to this theoretical proposal.
[Phys. Rev. Lett. 115, 123601] Published Wed Sep 16, 2015
Electromagnetic Saturation of Angstrom-Sized Quantum Barriers at Terahertz Frequencies
Author(s): Young-Mi Bahk, Bong Joo Kang, Yong Seung Kim, Joon-Yeon Kim, Won Tae Kim, Tae Yun Kim, Taehee Kang, Jiyeah Rhie, Sanghoon Han, Cheol-Hwan Park, Fabian Rotermund, and Dai-Sik Kim
A 97% decrease in the normalized transmission of THz pulses is observed through subwavelength openings in van der Waals materials —- layered 2D materials with graphene-like properties.
[Phys. Rev. Lett. 115, 125501] Published Wed Sep 16, 2015
Entanglement Entropy in Two-Dimensional String Theory
Author(s): Sean A. Hartnoll and Edward A. MazencThe entropy of entanglement of a simple two dimensional model of quantum gravity is calculated by reducing the computation to an analysis of free fermions in one spatial dimension.[Phys. Rev. Lett. 115, 1…
Dirac Semimetals in Two Dimensions
Author(s): Steve M. Young and Charles L. KaneTheorists identify two-dimensional crystal structures that could host Dirac electrons similar to those observed in graphene.[Phys. Rev. Lett. 115, 126803] Published Wed Sep 16, 2015
Quasilocal Conserved Operators in the Isotropic Heisenberg Spin-1/2 Chain
Author(s): Enej Ilievski, Marko Medenjak, and Tomaž Prosen
A set of conserved operators is uncovered for an interacting spin model that allows a consistent quantum thermodynamical description of these interacting systems via its generalized Gibbs ensemble.
[Phys. Rev. Lett. 115, 120601] Published Wed Sep 16, 2015
Nearby red dwarfs could reveal planet secrets
Astronomers found large disks of dust around two of the stars, telltale signs of planets in the process of forming.
A shy galactic neighbor
Recently, astronomers have combined all the data available for the nearby Sculptor Dwarf Galaxy to create the most accurate star formation history ever determined for a dwarf spheroidal galaxy.
Cassini Finds Global Ocean in Saturn’s Moon Enceladus
A global ocean lies beneath the icy crust of Saturn’s geologically active moon Enceladus, according to new research using data from NASA’s Cassini mission.
Dynamic Weakening by Acoustic Fluidization during Stick-Slip Motion
Author(s): F. Giacco, L. Saggese, L. de Arcangelis, E. Lippiello, and M. Pica CiamarraAcoustic waves spontaneously appear inside a simulated fault right before it begins to slip.[Phys. Rev. Lett. 115, 128001] Published Tue Sep 15, 2015
NASA’s Solar Dynamics Observatory catches a double photobomb
Just as the Moon came into SDO’s field of view on a path to cross the Sun, Earth entered the picture, blocking SDO’s view completely.
Cassini finds global ocean in Saturn’s moon Enceladus
Researchers found that the magnitude of the moon’s slight wobble, as it orbits Saturn, can only be accounted for if its outer ice shell is not frozen solid to its interior.
EFS täppisteaduste sügiskool jälle tulekul!
Realization of Microwave Quantum Circuits Using Hybrid Superconducting-Semiconducting Nanowire Josephson Elements
Author(s): G. de Lange, B. van Heck, A. Bruno, D. J. van Woerkom, A. Geresdi, S. R. Plissard, E. P. A. M. Bakkers, A. R. Akhmerov, and L. DiCarlo
A qubit made of a semiconducting nanowire sandwiched between two superconductors could simplify the design of quantum information processing architectures.
[Phys. Rev. Lett. 115, 127002] Published Mon Sep 14, 2015
Semiconductor-Nanowire-Based Superconducting Qubit
Author(s): T. W. Larsen, K. D. Petersson, F. Kuemmeth, T. S. Jespersen, P. Krogstrup, J. Nygård, and C. M. Marcus
A qubit made of a semiconducting nanowire sandwiched between two superconductors could simplify the design of quantum information processing architectures.
[Phys. Rev. Lett. 115, 127001] Published Mon Sep 14, 2015
Palju toredaid mõtteid …
Uus kooliaasta on alanud! Suviseid noppeid: TÜ füüsika erialale on õppima asunud rohkem üliõpilasi, kui eelneval aastal. Gunnar Oki raport vallandas hetkeks avaliku diskussiooni Eesti kõrghariduse olukorrast ja tulevikust. Füüsikaõpetajate põud süveneb – endiselt valitseb olukord, kus Eesti ülikoolidest uusi õpetajaid praktiliselt ei tule, samas vanem põlvkond astub järjest kõrvale. Igal suvel jõuab füüsikaõpetajate listi […]
Study finds barrage of small asteroids shattered Moon’s upper crust
Further impacts to these regions may have then sealed up cracks and decreased porosity.
Mars panorama from Curiosity shows petrified sand dunes
This sandstone outcrop has a structure called crossbedding on a large scale that the team has interpreted as deposits of sand dunes formed by wind.
Andreas Mogensen lands after a busy mission on Space Station
ESA astronaut Andreas Mogensen, Soyuz spacecraft commander Gennady Padalka and Kazakh cosmonaut Aidyn Aimbetov landed this morning at 00:51 GMT (02:51 CEST 12 September) in the steppe of Kazakhstan, marking the end of their missions to the…
Mars Panorama from Curiosity Shows Petrified Sand Dunes
The next rock target to be drilled by NASA’s Curiosity Mars rover may be sandstone that was deposited by wind, unlike previous rock targets deposited by water.
Study Contrasts Effects of Two Types of SoCal Fires
Wildfires driven by autumn Santa Ana winds are 10 times more expensive than summer fires, a new study shows. But both kinds are costly, and both are on the increase.
Untangling the Mechanics and Topology in the Frictional Response of Long Overhand Elastic Knots
Author(s): M. K. Jawed, P. Dieleman, B. Audoly, and P. M. Reis
Knots tied with stiff wire have a simplified geometry that reveals the relationship between the configuration of a knot and the forces within it.
[Phys. Rev. Lett. 115, 118302] Published Fri Sep 11, 2015
Observation of Z_{c} (3900)^{0} in e^{+} e^{−} →π^{0} π^{0} J/ψ
Author(s): M. Ablikim et al. (BESIII Collaboration)
The neutral partner of the four-quark state Zc(3900)+− is observed in electron-positron collisions by the BESIII Collaboration.
[Phys. Rev. Lett. 115, 112003] Published Fri Sep 11, 2015
New Measurement of Antineutrino Oscillation with the Full Detector Configuration at Daya Bay
Author(s): F. P. An et al. (Daya Bay Collaboration)
Antineutrino oscillation data from the fully constructed Day Bay Reactor Neutrino experiment improves the precision of the smallest of the three neutrino mixing angles by a factor of two.
[Phys. Rev. Lett. 115, 111802] Published Fri Sep 11, 2015
Supervising two rovers from space
ESA astronaut Andreas Mogensen is proving to be an expert space driver after commanding two rovers from space this week. As part of ESA’s Meteron project, Andreas drove a second, car-sized rover from the International Space Station to repair a mockup lunar base in the Netherlands.
NASA telescopes find galaxy cluster with vibrant heart
The unexpected find suggests that behemoth galaxies at the cores of massive clusters can grow significantly by feeding off gas stolen from other galaxies.
Mysterious, massive, magnetic stars
A student has found a rare close binary composed of two massive stars with magnetic fields.
Galileo taking flight: ten satellites now in orbit
Europe’s own satellite navigation system has come a step nearer to completion today, with Galileo 9 and 10 which lifted off together at 02:08 GMT on 11 September (04:08 CEST; 23:08 local time, 10 September) from Europe’s Spaceport in French Guiana, atop a Soyuz launcher.
New Pluto images from NASA’s New Horizons show complex terrain
They reveal new features as diverse as possible dunes, nitrogen ice flows that apparently oozed out of mountainous regions onto plains, and even networks of valleys that may have been carved by material flowing over Pluto’s surface.
NASA Telescopes Find Galaxy Cluster with Vibrant Heart
Astronomers have discovered a rare beast of a galaxy cluster whose heart is bursting with new stars.
Sweeping over the south pole of Mars
An unusual observation by Mars Express shows a sweeping view over the planet’s south polar ice cap and across its ancient, cratered highlands.
Mercury’s movements give scientists peek inside the planet
New measurements show that Mercury is spinning on its axis about nine seconds faster than scientists had previously calculated.
Astronomers uncover signs of earliest galaxies
A new statistical method enabled scientists to parse out signals from the noise in Hubble’s deep-sky images, providing the first estimate of the number of small galaxies in the early universe.
Investigating sea level rise due to global warming in the teaching laboratory using Archimedes’ principle
A teaching laboratory experiment is described that uses Archimedes’ principle to precisely
investigate the effect of global warming on the oceans. A large component of sea level rise is due
to the increase in the volume of water due to the decrease…
Classroom reconstruction of the Schwarzschild metric
A promising way to introduce general relativity (GR) in the classroom is to study the physical
implications of certain given metrics, such as the Schwarzschild one. This involves lower
mathematical expenditure than an approach focusing on differentia…
Effects of surface roughness on rolling friction
Rolling friction is commonly associated with deformation of the rolling object or surface,
particularly if the object or surface is soft. When a hard object rolls on a hard surface, surface
roughness is also a significant factor. Several experiments …
Parallax in the park
This article describes a parallax experiment performed by undergraduate physics students at
Queensland University of Technology. The experiment is analogous to the parallax method used in
astronomy to measure distances to the local stars. The result …
Introduction to direct variational and moment methods and an application to the Child–Langmuir law
A short introduction is given of direct variational methods and its relation to Galerkin and moment
methods, all flexible and powerful approaches for finding approximate solutions of difficult
physical equations. A pedagogical application of moment m…
Ceres’ Bright Spots Seen in Striking New Detail
The brightest spots on the dwarf planet Ceres gleam with mystery in new views delivered by NASA’s Dawn spacecraft.
Generation of Stable Overlaps between Antiparallel Filaments
Author(s): D. Johann, D. Goswami, and K. KruseCross-linkers and molecular motors are behind the stable overlap of antiparallel microtubule regions that form during, and are needed for, successful cell division.[Phys. Rev. Lett. 115, 118103] Published W…
Gigantic Surface Lifetime of an Intrinsic Topological Insulator
Author(s): Madhab Neupane, Su-Yang Xu, Yukiaki Ishida, Shuang Jia, Benjamin M. Fregoso, Chang Liu, Ilya Belopolski, Guang Bian, Nasser Alidoust, Tomasz Durakiewicz, Victor Galitski, Shik Shin, Robert J. Cava, and M. Zahid HasanExceptionally long-lived …
Measurement of the Ratio of Branching Fractions B(B [over ¯] ^{0} →D^{*+} τ^{−} ν [over ¯] _{τ} )/B(B [over ¯] ^{0} →D^{*+} μ^{−} ν [over ¯] _{μ} )
Author(s): R. Aaij et al. (LHCb Collaboration)
The decay of B mesons into τ leptons is 2.1 standard deviations greater than the Standard Model prediction, according to measurements by the LHCb Collaboration. This agrees with a previous measurement of the BABAR Collaboration.
[Phys. Rev. Lett. 115, 111803] Published Wed Sep 09, 2015
Ceres’ bright spots seen in striking new detail
The new up-close view of Occator Crater from Dawn’s current vantage point reveals better-defined shapes of the brightest central spot and features on the crater floor.
Astronomers discover how lowly dwarf galaxy becomes star-forming powerhouse
The answer lies in densely packed and previously unrecognized nuggets of star-forming material sprinkled through the galaxy.
Galileo satellites in launch zone
Europe’s ninth and tenth Galileo satellites have reached their launch pad, taking their position atop the vertical Soyuz launcher in readiness for Friday’s launch.
Spectrotemporal Shaping of Seeded Free-Electron Laser Pulses
Author(s): David Gauthier, Primož Rebernik Ribič, Giovanni De Ninno, Enrico Allaria, Paolo Cinquegrana, Miltcho Bojanov Danailov, Alexander Demidovich, Eugenio Ferrari, Luca Giannessi, Benoît Mahieu, and Giuseppe Penco
A free-electron laser can be precisely controlled to produce temporally patterned pulses of ultraviolet light.
[Phys. Rev. Lett. 115, 114801] Published Tue Sep 08, 2015
New Horizons spacecraft begins intensive data downlink phase
The mission team has begun the yearlong intensive downlinking of the tens of gigabits of data the spacecraft collected and stored on its digital recorders from the Pluto flyby.
Understanding the pointer states
In quantum mechanics, pointer states are eigenstates of the observable of the measurement apparatus
that represent the possible positions of the display pointer of the equipment. The origin of this
concept lies in attempts to fill the blanks in Evere…
Understanding the pointer states
In quantum mechanics, pointer states are eigenstates of the observable of the measurement apparatus
that represent the possible positions of the display pointer of the equipment. The origin of this
concept lies in attempts to fill the blanks in Evere…
Understanding the pointer states
In quantum mechanics, pointer states are eigenstates of the observable of the measurement apparatus
that represent the possible positions of the display pointer of the equipment. The origin of this
concept lies in attempts to fill the blanks in Evere…