Archive for November 11th, 2009

Physicists theorize about “reverse chronological causation” preventing discovery of the Higgs boson

Theoretical physicists, in the absence of new data on which to base their theories, are having a lot of fun these days. TIME reports that two prominent physicists explain the repeated problems with te Large Hadron Collider (LHC) through “reverse chronological causation” or sabotage from the future:

Did a Time-Traveling Bird Sabotage the Collider?

Sometime on Nov. 3, the supercooled magnets in sector 81 of the Large Hadron Collider (LHC), outside Geneva, began to dangerously overheat. Scientists rushed to diagnose the problem, since the particle accelerator has to maintain a temperature colder than deep space in order to work. The culprit? “A bit of baguette,” says Mike Lamont of the control center of CERN, the European Organization for Nuclear Research, which built and maintains the LHC. Apparently, a passing bird may have dropped the chunk of bread on an electrical substation above the accelerator, causing a power cut. The baguette was removed, power to the cryogenic system was restored and within a few days the magnets returned to their supercool temperatures.

While most scientists would write off the event as a freak accident, two esteemed physicists have formulated a theory that suggests an alternative explanation: perhaps a time-traveling bird was sent from the future to sabotage the experiment. Bech Nielsen of the Niels Bohr Institute in Copenhagen and Masao Ninomiya of the Yukawa Institute for Theoretical Physics in Kyoto, Japan, have published several papers over the past year arguing that the CERN experiment may be the latest in a series of physics research projects whose purposes are so unacceptable to the universe that they are doomed to fail, subverted by the future.

The LHC, a 17-mile underground ring designed to smash atoms together at high energies, was created in part to find proof of a hypothetical subatomic particle called the Higgs boson. According to current theory, the Higgs is responsible for imparting mass to all things in the universe. But ever since the British physicist Peter Higgs first postulated the existence of the particle in 1964, attempts to capture the particle have failed, and often for unexpected, seemingly inexplicable reasons.

In 1993, the multibillion-dollar United States Superconducting Supercollider, which was designed to search for the Higgs, was abruptly canceled by Congress. In 2000, scientists at a previous CERN accelerator, LEP, said they were on the verge of discovering the particle when, again, funding dried up. And now there’s the LHC. Originally scheduled to start operating in 2006, it has been hit with a series of delays and setbacks, including a sudden explosion between two magnets nine days after the accelerator was first turned on, the arrest of one of its contributing physicists on suspicion of terrorist activity and, most recently, the aerial bread bombardment from a bird. (A CERN spokesman said power cuts such as the one caused by the errant baguette are common for a device that requires as much electricity as the nearby city of Geneva, and that physicists are confident they will begin circulating atoms by the end of the year).

In a series of audacious papers, Nielsen and Ninomiya have suggested that setbacks to the LHC occur because of “reverse chronological causation,” which is to say, sabotage from the future. The papers suggest that the Higgs boson may be “abhorrent to nature” and the LHC’s creation of the Higgs sometime in the future sends ripples backward through time to scupper its own creation. Each time scientists are on the verge of capturing the Higgs, the theory holds, the future intercedes. The theory as to why the universe rejects the creation of Higgs bosons is based on complex mathematics, but, Nielsen tells TIME, “you could explain it [simply] by saying that God, in inverted commas, or nature, hates the Higgs and tries to avoid them.”

Many physicists say that Nielsen and Ninomiya’s theory, while intellectually interesting, cannot be accurate because the event that the LHC is trying to recreate already happens in nature. Particle collisions of an energy equivalent to those planned in the LHC occur when high-energy cosmic rays collide with the earth’s atmosphere. What’s more, some scientists believe that the Tevatron accelerator at Fermi National Accelerator Laboratory (or Fermilab) near Chicago has already created Higgs bosons without incident; the Fermilab scientists are now refining data from their collisions to prove the Higgs’ existence.

Nielsen counters that nature might allow a small number of Higgs to be produced by the Tevatron, but would prevent the production of the large number of particles the LHC is anticipated to produce. He also acknowledges that Higgs particles are probably produced in cosmic collisions, but says it’s impossible to know whether nature has stopped a great deal of these collisions from happening. “It’s possible that God avoids Higgs [particles] only when there are very many of them, but if there are a few, maybe He let’s them go,” he says.

Nielsen and Ninomiya’s theory represents one side of an intellectual divide between particle physicists today. Contemporary physicists tend to fall into one of two camps: the theorists, who posit ideas about the origins and workings of the universe; and experimentalists, who design telescopes and particle accelerators to test these theories, or provide new data from which novel theories can emerge. Most experimentalists believe that the theorists, due to a lack of new data in recent years, have reached a roadblock – the Standard Model, which is the closest thing the theorists have to an evidence-backed “theory of everything,” provides only an incomplete explanation of the universe. Until theorists get further data and evidence to move forward, the experimentalists believe, they end up simply making wild guesses – like those concerning time-traveling saboteurs – about how the universe works. “Nielsen and Ninomiya’s theories are clearly crazy theories,” says Dmitri Denisov, a physicist and Higgs-hunter at the DZero experiment at Fermilab. “In recent years theorists have been starving for experimental input and as a result, theories of second type are propagating widely. The majority of them have nothing to do with world we live in.”

Nielsen concedes, “We have very little data, so theorists are going their own ways and making a lot of theories that may not be very plausible. We need guidance from experimentalists to make the theories more healthy.”

“But,” he adds, “in terms of our theory, we are submitting to a form of experiment. We are saying the LHC won’t be allowed to produce a large number of Higgs. If it does, it would be very damaging to our theory.”

Particle physics has a long history of zany theories that turned out to be true. Niels Bohr, the doyen of modern physicists, often told a story about a horseshoe he kept over his country home in Tisvilde, Denmark. When asked whether he really thought it would bring good luck, he replied, “Of course not, but I’m told it works even if you don’t believe in it.” In other words: if preposterous theories are mathematically sound and can be confirmed by observation, they are true, even if seemingly impossible to believe. To scientists in the early 20th century, for example, quantum mechanics may have seemed outrageous. “The concept that you could have a wave-particle duality – that an object could take on either wave-like properties or point-like properties, depending on how you observe it – takes a huge leap of imagination,” says Roberto Roser, a scientist at Fermilab. “Sometimes outlandish papers turn out to be the laws of physics.”

So what would Peter Higgs himself make of the intellectual controversy surrounding his eponymous particle? Speaking on behalf of his friend, Professor Richard Kenway, who holds Higgs’ former position at the University of Edinburgh, says that the 78-year-old emeritus professor remains quietly confident that the LHC will discover the Higgs boson when it is eventually running at full strength. For his part, Kenway says the LHC’s delays are to be expected given the size and intricacy of the $9 billion experiment. And he says if he ever needs further proof that the Higgs boson is not abhorrent to nature, he need only spend time with his friend and mentor. “If nature truly did not want us to discover the Higgs, a cosmic ray would have zapped the embryo that became Peter, preventing its development into a physicist,” he says.

2 comments November 11th, 2009

NYT on Arar case: US government also subject to laws

The New York Times, in an editorial, joins those contrasting the Italian court conviction of CIA kidnappers with a US court’s decision that kidnap and torture victim Maher Arar has no legal recourse.

A National Disgrace

New York Times Editorial

Two courts, one in Italy and one in the United States, ruled recently on the Bush administration’s practice of extraordinary rendition, which is the kidnapping of people and sending them to other countries for interrogation — and torture. The Italian court got it right. The American court got it miserably wrong.

In Italy, a judge ruled that a station chief for the Central Intelligence Agency and 22 other Americans broke the law in the 2003 abduction of Osama Moustafa Hassan Nasr, a Muslim cleric who ended up in Egypt, where he said he was tortured.

Two days earlier, a federal appeals court in Manhattan brushed off a lawsuit by Maher Arar, a Syrian-born Canadian citizen who was seized in an American airport by federal agents acting on bad information from Canadian officials. He was held incommunicado and harshly interrogated before being sent to Syria, where he was tortured. He spent almost a year in a grave-size underground cell before the Syrians let him go.

The United States Court of Appeals for the Second Circuit decided that none of that entitled Mr. Arar to a day in court.

In Mr. Nasr’s case, authorities said that they had reason to suspect he was involved in recruiting militants to go to Iraq. It has long been established that Mr. Arar was not guilty of anything. Canada admitted that it had supplied false information to American authorities, and in 2007, it apologized and offered Mr. Arar $10 million in damages. Neither the Bush nor Obama administrations followed suit, leaving Mr. Arar to pursue litigation.

In June 2008, a three-judge panel of the same court dismissed Mr. Arar’s civil rights suit on flimsy grounds. The court then took a rare step, scheduling a rehearing before all of the court’s active members before an appeal was filed. Sadly, the full court’s decision is even more insensitive to the violation of his rights and the courts’ duty to hold government accountable for breaches of the law.

Written by Chief Judge Dennis Jacobs, the 59-page majority opinion held that no civil damages remedy exists for the horrors visited on Mr. Arar. To “decide how to implement extraordinary rendition,” he wrote, is “for the elected members of Congress — and not for us as judges.” Allowing suits against policy makers for rendition and torture would “affect diplomacy, foreign policy and the security of the nation,” Judge Jacobs said.

The ruling distorts precedent and the Constitutional separation of powers to deny justice to Mr. Arar and give officials a pass for egregious misconduct. The overt disregard for the central role of judges in policing executive branch excesses has frightening implications for safeguarding civil liberties, as four judges suggested in dissenting opinions.

It is painful to recall that this is the same federal circuit court that declared in 1980 that even foreigners accused of torture in foreign countries can be called to account in American courts. The torturer is the “enemy of all mankind,” the Court of Appeals for the Second Circuit declared back then. One of the dissenters, Judge Guido Calabresi, said that “when the history of this distinguished court is written, today’s majority decision will be viewed with dismay.”

The damage to Mr. Arar, America’s reputation and the rule of law is already quite plain. The Supreme Court should reverse this ruling.

November 11th, 2009


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