Saturday, December 26, 2015

A humongous Higgs?

Last week's blogs and websites have been atwitter with news of what could be a new Higgs boson. Both the ATLAS and CMS collaborations have seen `a bump in the data' at 750 GeV. Both collaborations have been seeing that proton-proton collisions that result in an unexpected number of di-photon pairs, pairs of photons which together carry away about 750 GeV of energy. This could be a new Higgslike boson, but 6 times more massive than the Higgs boson of the Standard model discovered in 2012. The statistics are nowhere near a level at which, anyone can claim an actual discovery, nor have the spokesmen of either collaboration done so. Atlas has discovered about 40 more pairs of photons, than what is predicted by the Standard model, and CMS has found just 10. However, it is intriguing that two independent experiments have found the photons at exactly identical energies. It could be a hulking Higgs after all! Of course, this could all vanish away into nothing. Watch this space for further updates.

Update: 05/08/16

Alas, it did vanish away into nothing, despite 500 theory papers. (The experimentalists were *not* guilty of overhyping the data). There was even a Game of Thrones citation contest on the this. Until
next time then, when we hope actual business will result.

Tailpiece: What did the HB say to the HHB ? You may be incredible, but I am Noble.

New Tailpiece: What did one photon say to another? I think all this was a bit much!

This blog post by Neelima Gupte and Sumathi Rao.

Sunday, November 8, 2015

Bihar and Samose

Jab tak  samose mein hai aloo,
Jungle mein  hai bhaloo,
Bihar mein hai Laloo.

Well, Nitish Kumar, strictly speaking, but there is no denying the role of Laloo in the Mahagathbandhan's thumping  victory in the Bihar elections. This was one occasion on which the Mahagathbandhan got everything right, the electoral alliance, the caste politics, Nitish's governance, Laloo's grassroots base and the Congress' achievement in putting everyone together.

The BJP erred in not controlling the RSS demagoguery, aroused fear among Muslims, made ill timed remarks on the abolition of reservations, and missed the fact that the Modi magic had waned, at least at the state level. The results were there for all to see. All but one of the exit polls had indicated the trends clearly, although the one which predicted the thumping victory, attributed it in the wrong direction. The TV channels leaned in the same direction, until the actual numbers started kicking in.

So does this indicate that the Indian electorate has changed its mind? Its hard to say. The jantajanardan has voted in opposite directions in state and central polls, a countless number of times. On the other hand, the ruling dispensation has perhaps received warning that it should not lose its way into delusions of invincibility. Maybe that is a sufficient lesson, for the present.

This blog post is by Neelima Gupte and Sumathi Rao.

Sunday, September 6, 2015

The cross roads of the world

Where does East meet West, Europe meet Asia, where do the great conquerors cross paths, where do the world's great religions clash and cross over? At Istanbul, of course, besides the beautiful blue Bosphorus. Identities merge and emerge, opinions clash and synthesise,  territories change and rechange hands, civilisations syncretise, resulting in the most glorious art, architecture and literature that the world has ever seen.  Here is a picture of the crossroads of the world, note the distances to Russian cities  and to Babylon. The actual ancient crossroads are the Milion monument, the stone structure on the right, which was the starting point of the great Roman road Via Egnetia, that lead to European cities, and the reference point to all distances on it.  The crossroads of the world now faces the influx of refugees from Syria, and as the Turkish premier pointed out, has been far more generous than most countries of Europe with its hospitality.

The city is full of mosques, and churches and palaces, minarets and steeples, Byzantine architecture overlaid with Ottoman flourishes. Practically nothing in the city has not changed hands, not once, but several times. The blue mosque is one of the most famous mosques in Istanbul. The Aya Sophia mosque  just opposite it is now a museum, and  has changed function many times.

The heart of the city is the Bosphorus, and the bridges across it, bridging Asia and Europe. The Bosphorus cruise and the suspension bridges across it, constitute the highlights of any Istanbul trip. Public transport in the city covers all bases, ferry, tram, bus and taxi.

Here is a not so common Istanbul experience. A trip to an island in the Bosphorus, a lovely place with 150 year old houses, and a charming neighbourhood feel. Lucky are the friends who live there, who shared their gracious household with us. No motorized transport allowed here. If you won't walk, take a horse drawn carriage.

As always it was too short a trip. So here's to hoping we visit again to catch the many wonders we missed, and to meet again the warm citizens of the city who spent enormous time and trouble shepherding around confused foreigners.

This blog post is by Neelima Gupte and Sumathi Rao.

Tuesday, July 14, 2015

New Horizons

Nasa's spacecraft, New horizons is flying by Pluto today, its point of closest approach scheduled for this morning EST (late afternoon for us). The mission is expected to yield new insights into the last known world, the icy dwarf planet, which had its status demoted from a planet a few  years ago, much to the chagrin of those who always thought it was a planet (viz. us!). Since this is the first fly by Pluto, the planetary scientists are licking their lips, waiting for data of kinds never seen before. Every first fly by other planets like Mars, Saturn and Jupiter has revealed unexpected features. Pluto is about to reveal its secrets. New horizons are about to be seen in planetary astronomy. Do stand by.

Photo: NASA, Pluto and Charon, July 12, 2015. Picture taken by the New Horizon spacecraft.


New horizons emerged safely from the fly by and communications blackout, and is beaming stunning pictures from the fly by. Here is an icy mountain.

 This mountain is as high as the Rockies, and is fairly young, as seen by the lack of craters. This evidence of recent geological activity in the icy planet will provoke much speculation, and new geological theories. Meanwhile CERN found the pentaquark yesterday, so quantum mechanical scales are competing with astronomical scales in new discoveries. This is truly an exciting time to be a physicist. Let's see what both scales throw up next.


More goodies from the New Horizons bag. A mountain in a moat on Charon. Here is the picture.

The heart shaped feature seen in the most popular Pluto picture are really icy plains which look like this:

By the way, the processor on New Horizons is a reprogrammed PlayStation chip. It shows anything that can play video games, can fly across the Solar System and and send back the most amazing data and pictures. Was it worthwhile having a nine year mission for a three minute flyby? You bet it was!
Just look above.

This blog post is by Neelima Gupte and Sumathi Rao.

Tuesday, June 30, 2015

The Chennai Metro

This is a highly local post, but why must we always be global?  The Chennai Metro was inaugurated yesterday, with minimal fanfare via video-conferencing,  by Tamil Nadu CM Jayalalitha, and with great enthusiasm by Tamil Nadu's (or more accurately) Chennai's general public. The first line from Alanthur to Koyambedu was crammed with everyone from children to housewives to office-goers to policemen, all in great spirits and busy clicking selfies, to mark the occasion. The first metro was driven by a young lady,  A. Preethi, who changed jobs to fulfil her dream of becoming a loco driver, and whose mother burst into tears at the happiness of the occasion.
Here you see the train, festooned with jasmine, as befits a smartly dressed lady from our city, and here you see where she is dressed up to go.  Alas, it's nowhere near us as yet. We will have to make do with the MRTS (that is the mustard line in the map), which was equally thrilling when it came, and still causes squeals of excitement when it whizzes past our balcony, albeit in the distance.  Finally,  fast cars, aeroplanes, rockets and the Mangalyaan not withstanding, there is nothing like a train!

This blog post by Neelima Gupte and Sumathi Rao.

Tuesday, May 12, 2015

Land of kings 3

Here is instalment three of the Land of Kings series. This time its Udaipur, Kumbhalgarh, Ranakpur and Mount Abu. Of these Udaipur needs no introduction. It's the most scenic location in Rajasthan, and as such, has featured in everything from movies to TV. Its most iconic son, Rana Pratap, is honoured in legend and song. The city palace at Udaipur has everything a palace should ever have, from the Sun symbol of the Sisodias, to grand rooms, beautiful murals, shady courtyards, and of course a sheesh mahal, apart from some of the

the most beautiful paintings that can be seen in Rajasthan. The lake palace, is a distant mirage in the lake, alas; only accessible to the well-heeled.  Haldi ghati, with its famous battle, and tales of valour, loyalty and betrayal, is also far from the city, but Rana Pratap and his loyal horse Chetak stand guardian over the city.

On next to Kumbhalgarh, made by Rana  Kumbha and used by Udai Singh and Rana Pratap during their long drawn battles with the Mughals. The fort  wall is second only to the great wall of China in length. The history of the fort consists  of happy occasions, such as the birth of Rana Pratap in 1540 as well as unhappy ones such as the murder of Rana Kumbha by his own traitorous son Ude in 1468.  The fort owes its existence to the sacrifice of a sage who offered himself as sacrifice so that the fort could be built. The gate of the fort was made where his head fell, and the walls where his body did.  A temple to him was made inside the fort walls. The fort is almost impregnable, and only fell in battle once. A spectacular view of the Aravallis can be seen from the topmost ramparts. The sound and light show at night is full of these wonderful stories, far better than the show at Amer, those who fought the Mughals make for the good stories, not the ones who fought for them! We had the good fortune of seeing it on a full moon night, when the air is full of the whisperings of those who lived here before.

The last leg of the journey were the Jain temples of Ranakpur and Mount Abu. The marble carving of the temples is literally lace in stone. No pictures, alas, photography being firmly prohibited. The Jain temples all over, over 300 in Kumbhalgarh, a huge number in Chittorgarh, reminds one that the history of Jainism in  the region predates both Rajputs and Mughals, and goes back to the 11th century. 
So we returned from the land of kings once again. No, no, this is not the last edition of the LOK. The golden fortress beckons still.

This blog post is by Neelima Gupte and Sumathi Rao.

Saturday, March 28, 2015

North by Northeast!

Last week was on the peripatetic side, involving both North and Northeast (with a brief stop at home base in the south!).  North was Delhi and Chandigarh. No long digressions on this one, having already appeared on this blog before. This is, however, the first appearance of the North east on this blog, except for peripheral references.

The Northeast excursion was to Manipur's capital Imphal, and its outskirts. While the journey is tedious, it can be surprisingly short, if you get the right connections (and incur the risk of missing one).
Coming out at Imphal blinking in the bright sunlight of the early afternoon into a small city in the middle of a flat valley, gives a sense of a culture which is very different from the plains with the influence of Myanmar, which lies barely 70 kilometres away, providing a strong flavour.

The first stop in the expedition was Kangla castle. Here the local museum firmly swept us out, literally with a broom, closing time being four p.m, and us having arrived at ten minutes to four. However, the rest of the castle made up for the loss(if it was one, we will never know!) . The castle contains many monuments, new and old, places of worship, and is the location of many legends. The entrance is guarded by horned animals, whose bodies resemble the lions seen all over southeast asia, but the horns provide a new touch. There are two temples in the complex. One is the ancient temple of Govindaji which is more than a hundred years old. The deities of Radha and Krishna are no longer here, and are to be found in the Govindajee temple of the new palace. The other important temple is the temple of Pakhangba, an important deity of the  indigenous religion of the Meitei, who is represented by the sacred snake sign. The palace also contains the sacred grounds of the Sani Mahi, another important deity of the region, to say nothing of a rock under which the devil has been trapped!  Sani Mahism, the indigenous religion of Manipur, co-exists in Manipur with Hinduism, which was later adopted by the Hindu rulers.  Every home contains a room dedicated to the Sani Mahi, who is worshipped with offerings of food, and vegetables, especially on the Manipuri new year day, which occurred during our visit.  Sani Mahism can be found in Manipur, Bangla Desh, and Myanmar, and is staging a comeback to the region, with the Manipur Times recently reporting the `ghar wapasi' of a fairly large contingent.

The next day was more recent history. The India peace memorial at Red Hills, the scene of the last battle between the Indian Army and the Japanese Army, with Indian troops on both sides. The memorial, built by the Indian and Japanese governments, commemorates those who died in this battle.
Even more historic is the Indian National Army memorial in Moirang, where the INA flag was first flown, with Netaji Subhash Chandra Bose's statue, and a museum which contains the proclamation of
the INA Government, and other historic photos and documents.

Finally some natural beauty, Loktak lake, the largest freshwater lake in India, with floating islands which are large enough to support settlements. Altogether a lovely trip, with new and old friends, and much yet left to explore, and hopes of another visit. BTW, we did some essential work too!

This blog post by Neelima Gupte and Sumathi Rao.

Thursday, March 5, 2015

Rahul Basu 04/03/1956-05/03/2011

Time is the root of all this earth;
These creatures, who from Time had birth,
Within his bosom at the end
Shall sleep; Time hath nor enemy nor friend.

All we in one long caravan
Are journeying since the world began;
We know not whither, but we know
Time guideth at the front, and all must go.

Like as the wind upon the field
Bows every herb, and all must yield,
So we beneath Time’s passing breath
Bow each in turn, – why tears for birth or death?

Bhartrihari, ‘Time’, tr. Paul Elmer More

This blog post by Neelima Gupte and Sumathi Rao.

Monday, February 2, 2015

Dust in our eyes?

It appears that the latest Planck satellite data is conducive to the conclusion that the discovery of gravitational waves claimed by the BICEP2 collaboration last year, is not yet one to get starry eyed about. The latest data which measures the concentration of dust in the region where the BICEP2 measurements are carried out indicates that the quantum of dust is sufficiently large that it could be responsible for about half the B-wave polarisation observed in the BICEP2 signal. This has led to wide-spread disavowal of the BICEP2 results, and caused some dismay in circles that have been heartened by their support for inflationary scenarios. Those that went overboard in the opposite direction even said `Big Bang theory disproved' ! (The Times of India should really get some proper science reporters).

However, these reports of the demise of the theory are also highly premature (as in the case of Mark Twain!). The European Space Agency, which manages the Planck satellite,  puts it more soberly, “Despite earlier reports of a possible detection, a joint analysis of data from ESA’s Planck satellite and the ground-based BICEP2 and Keck Array experiments has found no conclusive evidence of primordial gravitational waves”.

 This null result does not disprove the existence of gravitational waves, nor does it rule out inflation. It merely indicates that BICEP2 has not detected gravitational waves yet, with a high degree of certainty. The gravitational wave signal may still exist in the observed BICEP2 data, but may be obscured by the noise, so this new result can place an upper limit on the possible strength of the B-mode polarisation caused by gravitational waves. The search for gravitational waves still continues, and we look forward to more conclusively established results in the near future.

This blog post is by Neelima Gupte and Sumathi Rao.

BTW: Speaking of science reporting, this is a good place to draw attention to the  IIT Madras science magazine brought out completely by IITM students on some of the research done at IIT Madras, including research on inflationary scenarios carried out at the Physics Department. Do have a look.