Regeneration and Mass Difference of Neutral<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>K</mml:mi></mml:math>Mesons

Müller, F.; Birge, Robert W.; Fowler, W.B.; Good, R. H.; Hirsch, Warner; Matsen, R.P.; Oswald, Larry O.; Powell, Wilson M.; White, Howard S.; Piccioni, O.

doi:10.1103/physrevlett.4.418

Cited by 63 publications

(7 citation statements)

References 8 publications

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“…In the second half of the 1950s, mixing was proposed by Gell-Mann and Pais [3] to occur in the K° system and experimentally confirmed a little later [4], [5]. In 1964 violation of CP symmetry was observed in the mixing of K° [6].…”

Section: Introductionmentioning

confidence: 83%

“…Because m^ <C A/w, we can write the effective Hamiltonian for the case of semileptonic and non-leptonic decays, renormalised at the scale p, = m&, as C1 V2 C2(mb ) __ } + h.c. , (1. 5) where GF is the effective Fermi coupling, q^ = |(1 -75)9 denotes the left-handed quark fields, d' = dcosdc + ssmOc and s' = scosOc -dsinOc are the Cabibborotated downand strange-quark fields, and we have neglected b ->• u transitions. The Wilson coefficients c\ and c2 take into account the QCD corrections arising from the fact that the effective Hamiltonian is written at a renormalisation scale JJL = rather than AIW , the mass of the W boson.…”

Section: B Meson Lifetimesmentioning

confidence: 99%

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Measurement of the Average $B^{0}_{s}$ Lifetime in the Decay $B^{0}_{s} \to J/\Psi\Phi$

Pauly¹

2003

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The lifetime difference between the long (CP odd) and short (CP even) lived components of the Bg meson is currently predicted to be of the order of 10 % in the Standard Model. It has been suggested that the decay Bg->• J/\|> 4) is predominantly CP even and thus the measured average lifetime could be shorter than the lifetime measured in the inclusive decay modes. We present a measurement of the average lifetime of the 6° meson in its decay Eg->• J/4> cj), with J/\|)-> M.+ M.~ and cj)->• K+K-. During January 2002 and August 2003 the CDF experiment at the Tevatron has been exposed to about 135 pb" 1 of pp collisions with a centre-of-mass energy of A/S = 1.96 TeV. In the data sample collected with the J/\Jj dimuon trigger we fully reconstruct about 125 Bg-> J/\J) (J) candidates with precision silicon information. This is currently the largest exclusive Bg sample. We perform a fit to the proper decay time information to extract the average Bg lifetime and simultaneously use the mass information to disentangle signal from background. For cross-checks we measure the lifetime in the higher statistics modes Bj-» J/\J> K* and B°-> J/4> K*°, which both have similar decay topologies and kinematics. We obtain r(B°s-> J/\|> cf>) = (1.31±5:l3(stat.) ± 0.02(syst.)) ps , which is currently the best single measurement of the Bg lifetime and is consistent with other measurements. This result is not accurate enough to establish the existence of a possible significant lifetime difference between the CP odd and even states. This thesis would not have been possible without the help and contributions of many friends and colleagues. I want to take the opportunity to thank all of them, and in particular: • Todd Huffman for giving me the opportunity to work with the CDF group at Oxford and dealing with the administrative side of my D.Phil. I am especially grateful for the opportunity to stay at Fermilab for 1.5 years. • Jeff Tseng for competent guidance, patient supervision and his constant interest in my work. His sharp physical understanding provided vital input at any time. Together with Farrukh Azfar for the great culinary expeditions all across Chicagoland. • Joe Boudreau for his great experience in particle physics and many stimulating discussions on B lifetimes.

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Section: Introductionmentioning

confidence: 83%

Section: B Meson Lifetimesmentioning

confidence: 99%

Measurement of the Average $B^{0}_{s}$ Lifetime in the Decay $B^{0}_{s} \to J/\Psi\Phi$

Pauly¹

2003

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“…are vector and axial vector operators respectively, and c i are coefficients which accommodate the maximal parity violation by neutrinos in CP Violation It was assumed that the kaon eigenstates, K 0 S and K 0 L , were pure CP-even and CP-odd eigenstates respectively. In the early 1960s it was demonstrated that a pure K L beam could show K S regeneration when interacting with matter [14]. However, it was shown that there seemed to be an excess of K S regeneration in the forward direction [15].…”

Section: Historymentioning

confidence: 99%

Measurement of CP Violation in B0d Mixing Using B0d → D*-μ+(νμ)X Decays

Ross

2012

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This thesis describes the measurement of the time-integrated semileptonic charge asymmetry in B 0 d mixing, a d sl , using the decay chain of B 0 d → D * − µ + (ν µ), D * − → This is far from a complete list of the thanks, there have been countless people who have aided me, leant an ear, or made an impact in my life during my years as a student. Thank you all, especially for being so understanding. Grumpy students can require a lot of patience. Such is the cost of science! Thanks go to all the staff and fellow students in Lancaster's HEP group, for their guidance and academic support. Additionally, I am grateful to all the members of Fermilab's B-physics group, and to the people of DØ as a whole. To my colleagues and mentors: I hugely appreciate the assistence rendered to me by Dr. Mark Williams during and after my time spent in at Fermilab. There has not been a single mathematical, physical, computational, or furniture moving problem that this gentleman was unable to assist me with. I am deeply apologetic for causing much more hassle to his working life than he may have been expecting, but I am much obliged that he took the time to get me up to speed on most of the topics involved in my analyses. Dr. Guennadi Borissov, who wrote many of the software libraries that the DØ B-physics group uses. He is deeply knowledgeable in all matters to do with B physics phenomenology and experimentation, and I hope that the groundbreaking studies he undertakes afford him the world renown he deserves. Dr. Iain A. Bertram was my supervisor, and as such has had to sift through hundreds of my questions, draft talks, appraisals, and meeting requests over the last four years. I thank him for his advice, for steering me through my difficulties, and for the amusing barrages of creative swearing when any computer misbehaves. Dr. Rob Henderson taught my first postgraduate course in quantum field theory. His explanations and derivations were thorough and clear, but he deserves further acknowledgement for being both a theory and Linux guru. Similarly, Dr. Alex Finch should be thanked for starting me down the path of software engineering. 1 Mr. Rob Lewsey and Mrs. Christine Harmer battled on my behalf to manage the long term attachment funds and reimbursement during my time in North America. The process was not straight forward in the least, so these two deserve recognition for their patience and help. For my friends in and outside of academia: Alex Robson, a steadfast friend since my undergraduate years, has continued his role as entertainer, welcome distraction provider, and coffee drinker during this studentship. An ear for many of my rants and provider of a social life outside of work, he deserves my thanks. Sa Bom Nim Mark W. Wituk, 5 th Dan Tang Soo Do, was my martial arts master and a friend during my time in the United States. He is responsible for me staying in a working physical condition whilst I spent my working life at a computer desk. His guidance saw me competing in the 37 th National All Martial Arts Championship, in a ranke...

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“…In the 1960s, the regeneration method was used by O. Piccioni and his colleagues for a demonstration of the K L → K S transformation [50]. The mixing of neutral beam components K 0 and K 0 forms a two-level quantum system with weak decay eigenstates K L and K S .…”

Section: Introductionmentioning

confidence: 99%

Neutron-Mirror Neutron Oscillations in Absorbing Matter

et al. 2022

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The possibility that a neutron can be transformed to a hidden sector particle remains intriguingly open. Proposed theoretical models conjecture that the hidden sector can be represented by a mirror sector, and the neutron n can oscillate into its sterile mirror twin n′, exactly or nearly degenerate in mass with n. Oscillations n−n′ can take place in vacuum or in an environment containing regular matter and a magnetic field, in which only the neutron will be subject to interactions with the environment. We describe the propagation of the oscillating n−n′ system in a cold neutron beam passing through dense absorbing materials in connection to the possible regeneration type of experiments, where the effect of n→n′→n transformation can be observed.

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Regeneration and Mass Difference of NeutralKMesons

Cited by 63 publications

References 8 publications

Measurement of the Average $B^{0}_{s}$ Lifetime in the Decay $B^{0}_{s} \to J/\Psi\Phi$

Measurement of the Average $B^{0}_{s}$ Lifetime in the Decay $B^{0}_{s} \to J/\Psi\Phi$

Measurement of CP Violation in B<sup>0</sup><sub>d</sub> Mixing Using B<sup>0</sup><sub>d</sub> → D<sup>*-</sup>μ<sup>+</sup>(ν<sub>μ</sub>)X Decays

Neutron-Mirror Neutron Oscillations in Absorbing Matter

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