Jonathan Roberts
New York, New York, United States
3K followers
500+ connections
About
Activity
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It was a great team effort, thank you Mick Bowles Suleiman Disu, CertIOSH, MIIRSM, ALEX ARUNGWA , TechIOSH and Olawale Rasheed Olagoke. (Cert IOSH)…
It was a great team effort, thank you Mick Bowles Suleiman Disu, CertIOSH, MIIRSM, ALEX ARUNGWA , TechIOSH and Olawale Rasheed Olagoke. (Cert IOSH)…
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Great conversation with Nina Ruggiero, Crystal Vinisse Thomas, Tara Lewis, Gloria Loree and Jonathan Roberts at the brilliantly organized Travel +…
Great conversation with Nina Ruggiero, Crystal Vinisse Thomas, Tara Lewis, Gloria Loree and Jonathan Roberts at the brilliantly organized Travel +…
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Still beaming from my time in Aspen, Colorado. Thank you to Tricia Johnson for inviting me to be part of the 20th Aspen Ideas Festival. I had the…
Still beaming from my time in Aspen, Colorado. Thank you to Tricia Johnson for inviting me to be part of the 20th Aspen Ideas Festival. I had the…
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Experience & Education
Publications
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Limit on the mass of a long-lived or stable gluino.
Journal of High Energy Physics
We reinterpret the generic CDF charged massive particle limit to obtain a limit
on the mass of a stable or long-lived gluino. Various sources of uncertainty are examined.
The R-hadron spectrum and scattering cross sections are modeled based on known lowenergy hadron physics and the resultant uncertainties are quantified and found to be small
compared to uncertainties from the scale dependence of the NLO pQCD production cross
sections. The largest uncertainty in the limit comes from…We reinterpret the generic CDF charged massive particle limit to obtain a limit
on the mass of a stable or long-lived gluino. Various sources of uncertainty are examined.
The R-hadron spectrum and scattering cross sections are modeled based on known lowenergy hadron physics and the resultant uncertainties are quantified and found to be small
compared to uncertainties from the scale dependence of the NLO pQCD production cross
sections. The largest uncertainty in the limit comes from the unknown squark mass: when
the squark - gluino mass splitting is small, we obtain a gluino mass limit of 407 GeV, while
in the limit of heavy squarks the gluino mass limit is 397 GeV. For arbitrary (degenerate)
squark masses, we obtain a lower limit of 322 GeV on the gluino mass. These limits apply
for any gluino lifetime longer than ~30 ns, and are the most stringent limits for such a
long-lived or stable gluino.Other authors -
Pamela Through a Magnetic Lens
Journal of Cosmology and Astroparticle Physics
The PAMELA satellite has observed an excess in the positron to electron ratio above theoretical predictions in the range 10-100 GeV that increases with energy. We propose that the excess is not due to a change in the local interstellar spectrum, but is due to heliospheric modulation. We motivate this from the known form of the heliospheric magnetic field and predict that the excess will disappear when we enter a period of solar maximum activity.
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Did you know that young people prefer Dr Pepper to Coke? We did. #studyeverythingconstantly cc: Dr Pepper Snapple Group, The Coca-Cola Company…
Did you know that young people prefer Dr Pepper to Coke? We did. #studyeverythingconstantly cc: Dr Pepper Snapple Group, The Coca-Cola Company…
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This week our employees at IAC HQ enjoyed a summer mixer put on by Women@IAC. Complete with networking, refreshments and spectacular views, summer at…
This week our employees at IAC HQ enjoyed a summer mixer put on by Women@IAC. Complete with networking, refreshments and spectacular views, summer at…
Liked by Jonathan Roberts
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Good Impressions is back! We're continuing our commitment to amplifying diverse voices and empowering small businesses. Read, share, and apply.
Good Impressions is back! We're continuing our commitment to amplifying diverse voices and empowering small businesses. Read, share, and apply.
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Amazing work coming out of Dotdash Meredith Just Launched: Good Impressions! Good Impressions is Dotdash Meredith's pro-bono media and marketing…
Amazing work coming out of Dotdash Meredith Just Launched: Good Impressions! Good Impressions is Dotdash Meredith's pro-bono media and marketing…
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Just Launched: Good Impressions! Good Impressions is Dotdash Meredith's pro-bono media and marketing consultation program for BIPOC and…
Just Launched: Good Impressions! Good Impressions is Dotdash Meredith's pro-bono media and marketing consultation program for BIPOC and…
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Very excited we’re running this program. If you qualify, or know someone who does - get in touch! Don’t worry - the team helps every step of the way.
Very excited we’re running this program. If you qualify, or know someone who does - get in touch! Don’t worry - the team helps every step of the way.
Shared by Jonathan Roberts
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We're thrilled to announce that we've launched our 2024 Good Impressions program! Good Impressions is Dotdash Meredith's pro-bono media and marketing…
We're thrilled to announce that we've launched our 2024 Good Impressions program! Good Impressions is Dotdash Meredith's pro-bono media and marketing…
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THE FUTURE OF MEDIA: INSIGHTS FROM FIPP CONGRESS 24 Last month, I had the privilege of attending the 46th FIPP World Media Congress from June 4-6…
THE FUTURE OF MEDIA: INSIGHTS FROM FIPP CONGRESS 24 Last month, I had the privilege of attending the 46th FIPP World Media Congress from June 4-6…
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Back from two weeks delivering the Rothesay Classic in Birmingham. From freezing cold and wet to perfect tennis weather. A joy to work with the LTA…
Back from two weeks delivering the Rothesay Classic in Birmingham. From freezing cold and wet to perfect tennis weather. A joy to work with the LTA…
Liked by Jonathan Roberts
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Investigating innovation for publishers in Cannes… I had the great pleasure of writing a guest column for Media Makers Meet - Mx3 about this years…
Investigating innovation for publishers in Cannes… I had the great pleasure of writing a guest column for Media Makers Meet - Mx3 about this years…
Liked by Jonathan Roberts
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The Math is Mathing. Check out Dotdash Meredith's Neil Vogel and Axios' Sara Fischer on The Rebooting podcast, our live recording from Cannes last…
The Math is Mathing. Check out Dotdash Meredith's Neil Vogel and Axios' Sara Fischer on The Rebooting podcast, our live recording from Cannes last…
Liked by Jonathan Roberts
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