Question: For what contribution did Simon van der Meer won the that is given by he Royal Swedish Academy of Sciences?

Context paragraphs:
Magnetic horn: A magnetic horn or neutrino horn (also known as the Van der Meer horn) is a high-current, pulsed focusing device, invented by the Dutch physicist Simon van der Meer in CERN, that selects pions and focuses them into a sharp beam.  The original application of the magnetic horn was in the context of neutrino physics, where beams of pions have to be tightly focused.  When the pions then decay into muons and neutrinos or antineutrinos, an equally well-focused neutrino beam is obtained.

Surfbook: Surfbook was an early social networking service created by Dutch programmer Joannes Jozef Everardus van der Meer in the years prior to his death in June 2004.  Surfbook was based on technologies whose patents were filed by Van der Meer in 1998 and granted in 2001 and 2002.  It allowed users share their information with selected people and approve posts using a "Like" button, and to link to external information.  On February 5, 2013, holders of the patents related to this site (Rembrandt Social Media, LP) filed a lawsuit against Facebook for infringement.

Vonne van der Meer: Vonne van der Meer (born December 15, 1952 in Eindhoven) is a Dutch prose writer and playwright.  Since 1978 Van der Meer has been married to the Dutch writer Willem Jan Otten.

Nobel Prize in Physics: The Nobel Prize in Physics (Swedish: "Nobelpriset i fysik" ) is a yearly award given by the Royal Swedish Academy of Sciences for those who conferred the most outstanding contributions for mankind in the field of physics.  It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895 and awarded since 1901; the others being the Nobel Prize in Chemistry, Nobel Prize in Literature, Nobel Peace Prize, and Nobel Prize in Physiology or Medicine.

Gerrit van der Meer: Gerrit "Gert" van der Meer (born 1950) is a Dutch television producer, film producer and unit production manager.  Van der Meer has worked on several Hollywood productions since 1980.

L. Bouke van der Meer: Dr. Lammert Bouke van der Meer (born 1945 in Leeuwarden, Friesland) is a Dutch classicist and classical archaeologist specialized in etruscology.  He studied classics and archaeology at the University of Groningen.  Van der Meer is retired associate professor of Classical Archaeology at Leiden University, The Netherlands.

Simon van der Meer: Simon van der Meer (24 November 19254 March 2011) was a Dutch particle accelerator physicist who shared the Nobel Prize in Physics in 1984 with Carlo Rubbia for contributions to the CERN project which led to the discovery of the W and Z particles, two of the most fundamental constituents of matter.

Xanthe Canning: Xanthe Canning is a fictional character from the Australian soap opera "Neighbours", played by Lilly Van der Meer.  The character's introduction was teased by actress Colette Mann, who plays Sheila Canning, during an interview in October 2015.  Van der Meer's casting was announced the following month.  She learned she had won the role during her school lunch break, and she relocated from Queensland to Melbourne for filming.  Xanthe is the granddaughter of Sheila Canning and the half-sister of Kyle Canning (Chris Milligan).  She made her first appearance during the episode broadcast on 22 January 2016.

Old-Reformed Congregations (unconnected): The Old-Reformed Congregations (unconnected) was founded by Rev. Van der Meer, who separated from the Old-Reformed Congregations in the Netherlands in 2007.  In October 2007 Rev. Van der Meer and some members in the congregation in Sint Philipsland separated from the Old-Reformed Congregations, and later the denomination suspended him and cancelled his membership.

List of female Nobel laureates: The Nobel Prizes are awarded annually by the Royal Swedish Academy of Sciences, the Swedish Academy, the Karolinska Institute, and the Norwegian Nobel Committee to individuals who make outstanding contributions in the fields of Chemistry, Physics, Literature, Peace, Physiology or Medicine and Economics.  All but the economics prize were established by the 1895 will of Alfred Nobel, which dictates that the awards should be administered by the Nobel Foundation.  The Nobel prize in Economics, or The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel, was established in 1968 by the Sveriges Riksbank, the central bank of Sweden, for outstanding contributions in the field of Economics.  Each prize is awarded by a separate committee; the Royal Swedish Academy of Sciences awards the Prizes in Physics, Chemistry, and Economics, the Swedish Academy awards the Prize in Literature, the Karolinska Institute awards the Prize in Physiology or Medicine, and the Norwegian Nobel Committee awards the Prize in Peace.  Each recipient receives a medal, a diploma and a cash prize that has varied throughout the years.

Supporting paragraphs: Simon van der Meer Nobel Prize in Physics
Answer: CERN