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Article ; Online: Nucleon axial radius and muonic hydrogen-a new analysis and review.

Hill, Richard J / Kammel, Peter / Marciano, William J / Sirlin, Alberto

Reports on progress in physics. Physical Society (Great Britain)

2018 Volume 81, Issue 9, Page(s) 96301

Abstract: Weak capture in muonic hydrogen (μH) as a probe of the chiral properties and nucleon structure predictions of quantum chromodynamics (QCD) is reviewed. A recent determination of the axial-vector charge radius squared, [Formula: see text], from a model ... ...

Abstract	Weak capture in muonic hydrogen (μH) as a probe of the chiral properties and nucleon structure predictions of quantum chromodynamics (QCD) is reviewed. A recent determination of the axial-vector charge radius squared, [Formula: see text], from a model independent z expansion analysis of neutrino-nucleon scattering data is employed in conjunction with the MuCap measurement of the singlet muonic hydrogen capture rate, [Formula: see text], to update the induced pseudoscalar nucleon coupling [Formula: see text] derived from experiment, and [Formula: see text] predicted by chiral perturbation theory. Accounting for correlated errors this implies [Formula: see text], confirming theory at the 8% level. If instead, the predicted expression for [Formula: see text] is employed as input, then the capture rate alone determines [Formula: see text], or together with the independent z expansion neutrino scattering result, a weighted average [Formula: see text]. Sources of theoretical uncertainty are critically examined and potential experimental improvements are described that can reduce the capture rate error by about a factor of 3. Muonic hydrogen can thus provide a precise and independent [Formula: see text] value which may be compared with other determinations, such as ongoing lattice gauge theory calculations. The importance of an improved [Formula: see text] determination for phenomenology is illustrated by considering the impact on critical neutrino-nucleus cross sections at neutrino oscillation experiments.
Language	English
Publishing date	2018-05-01
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	205657-4
ISSN	1361-6633 ; 0034-4885
ISSN (online)	1361-6633
ISSN	0034-4885
DOI	10.1088/1361-6633/aac190
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Article: Bilder

KAMMEL, PETER

Brückenschlag

2001 Volume 17, Issue 1, Page(s) 64

Language	German
Document type	Article
ZDB-ID	1174158-2
Database	Current Contents Medicine

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Article ; Online: Cryogenic distillation facility for isotopic purification of protium and deuterium.

Alekseev, I / Arkhipov, Ev / Bondarenko, S / Fedorchenko, O / Ganzha, V / Ivshin, K / Kammel, P / Kravtsov, P / Petitjean, C / Trofimov, V / Vasilyev, A / Vasyanina, T / Vorobyov, A / Vznuzdaev, M

The Review of scientific instruments

2015 Volume 86, Issue 12, Page(s) 125102

Abstract: Isotopic purification of the protium and deuterium is an important requirement of many physics experiments. A cryogenic facility for high-efficiency separation of hydrogen isotopes with a cryogenic distillation column as the main element is described. ... ...

Abstract	Isotopic purification of the protium and deuterium is an important requirement of many physics experiments. A cryogenic facility for high-efficiency separation of hydrogen isotopes with a cryogenic distillation column as the main element is described. The instrument is portable, so that it can be used at the experimental site. It was designed and built at the Petersburg Nuclear Physics Institute, Gatchina, Russia. Fundamental operating parameters have been measured including a liquid holdup in the column packing, the pressure drops across the column and the purity of the product at different operating modes. A mathematical model describes expected profiles of hydrogen isotope concentration along the distillation column. An analysis of ortho-parahydrogen isomeric composition by gas chromatography was used for evaluation of the column performance during the tuning operations. The protium content during deuterium purification (≤100 ppb) was measured using gas chromatography with accumulation of the protium in the distillation column. A high precision isotopic measurement at the Institute of Particle Physics, ETH-Zurich, Switzerland, provided an upper bound of the deuterium content in protium (≤6 ppb), which exceeds all commercially available products.
Language	English
Publishing date	2015-12
Publishing country	United States
Document type	Journal Article
ZDB-ID	209865-9
ISSN	1089-7623 ; 0034-6748
ISSN (online)	1089-7623
ISSN	0034-6748
DOI	10.1063/1.4936413
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Book ; Online: Testing Lepton Flavor Universality and CKM Unitarity with Rare Pion Decays in the PIONEER experiment

PIONEER Collaboration / Altmannshofer, W. / Binney, H. / Blucher, E. / Bryman, D. / Caminada, L. / Chen, S. / Cirigliano, V. / Corrodi, S. / Crivellin, A. / Cuen-Rochin, S. / Di Canto, A. / Doria, L. / Gaponenko, A. / Garcia, A. / Gibbons, L. / Glaser, C. / Godoy, M. Escobar / Göldi, D. /

Gori, S. / Gorringe, T. / Hertzog, D. / Hodge, Z. / Hoferichter, M. / Ito, S. / Iwamoto, T. / Kammel, P. / Kiburg, B. / Labe, K. / LaBounty, J. / Langenegger, U. / Malbrunot, C. / Mazza, S. M. / Mihara, S. / Mischke, R. / Mori, T. / Mott, J. / Numao, T. / Ootani, W. / Ott, J. / Pachal, K. / Polly, C. / Počanić, D. / Qian, X. / Ries, D. / Roehnelt, R. / Schumm, B. / Schwendimann, P. / Seiden, A. / Sher, A. / Shrock, R. / Soter, A. / Sullivan, T. / Tarka, M. / Tischenko, V. / Tricoli, A. / Velghe, B. / Wong, V. / Worcester, E. / Worcester, M. / Zhang, C.

2022

Abstract: The physics motivation and the conceptual design of the PIONEER experiment, a next-generation rare pion decay experiment testing lepton flavor universality and CKM unitarity, are described. Phase I of the PIONEER experiment, which was proposed and ... ...

Abstract	The physics motivation and the conceptual design of the PIONEER experiment, a next-generation rare pion decay experiment testing lepton flavor universality and CKM unitarity, are described. Phase I of the PIONEER experiment, which was proposed and approved at Paul Scherrer Institut, aims at measuring the charged-pion branching ratio to electrons vs.\ muons, $R_{e/\mu}$, 15 times more precisely than the current experimental result, reaching the precision of the Standard Model (SM) prediction at 1 part in $10^4$. Considering several inconsistencies between the SM predictions and data pointing towards the potential violation of lepton flavor universality, the PIONEER experiment will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles up to the PeV mass scale. The later phases of the PIONEER experiment aim at improving the experimental precision of the branching ratio of pion beta decay (BRPB), $\pi^+\to \pi^0 e^+ \nu (\gamma)$, currently at $1.036(6)\times10^{-8}$, by a factor of three (Phase II) and an order of magnitude (Phase III). Such precise measurements of BRPB will allow for tests of CKM unitarity in light of the Cabibbo Angle Anomaly and the theoretically cleanest extraction of $\|V_{ud}\|$ at the 0.02\% level, comparable to the deduction from superallowed beta decays. Comment: contribution to Snowmass 2021 based on the PIONEER proposal (arXiv:2203.01981)
Keywords	High Energy Physics - Experiment ; High Energy Physics - Phenomenology ; Physics - Instrumentation and Detectors
Subject code	612
Publishing date	2022-03-10
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm.

Aguillard, D P / Albahri, T / Allspach, D / Anisenkov, A / Badgley, K / Baeßler, S / Bailey, I / Bailey, L / Baranov, V A / Barlas-Yucel, E / Barrett, T / Barzi, E / Bedeschi, F / Berz, M / Bhattacharya, M / Binney, H P / Bloom, P / Bono, J / Bottalico, E /

Bowcock, T / Braun, S / Bressler, M / Cantatore, G / Carey, R M / Casey, B C K / Cauz, D / Chakraborty, R / Chapelain, A / Chappa, S / Charity, S / Chen, C / Cheng, M / Chislett, R / Chu, Z / Chupp, T E / Claessens, C / Convery, M E / Corrodi, S / Cotrozzi, L / Crnkovic, J D / Dabagov, S / Debevec, P T / Di Falco, S / Di Sciascio, G / Drendel, B / Driutti, A / Duginov, V N / Eads, M / Edmonds, A / Esquivel, J / Farooq, M / Fatemi, R / Ferrari, C / Fertl, M / Fienberg, A T / Fioretti, A / Flay, D / Foster, S B / Friedsam, H / Froemming, N S / Gabbanini, C / Gaines, I / Galati, M D / Ganguly, S / Garcia, A / George, J / Gibbons, L K / Gioiosa, A / Giovanetti, K L / Girotti, P / Gohn, W / Goodenough, L / Gorringe, T / Grange, J / Grant, S / Gray, F / Haciomeroglu, S / Halewood-Leagas, T / Hampai, D / Han, F / Hempstead, J / Hertzog, D W / Hesketh, G / Hess, E / Hibbert, A / Hodge, Z / Hong, K W / Hong, R / Hu, T / Hu, Y / Iacovacci, M / Incagli, M / Kammel, P / Kargiantoulakis, M / Karuza, M / Kaspar, J / Kawall, D / Kelton, L / Keshavarzi, A / Kessler, D S / Khaw, K S / Khechadoorian, Z / Khomutov, N V / Kiburg, B / Kiburg, M / Kim, O / Kinnaird, N / Kraegeloh, E / Krylov, V A / Kuchinskiy, N A / Labe, K R / LaBounty, J / Lancaster, M / Lee, S / Li, B / Li, D / Li, L / Logashenko, I / Lorente Campos, A / Lu, Z / Lucà, A / Lukicov, G / Lusiani, A / Lyon, A L / MacCoy, B / Madrak, R / Makino, K / Mastroianni, S / Miller, J P / Miozzi, S / Mitra, B / Morgan, J P / Morse, W M / Mott, J / Nath, A / Ng, J K / Nguyen, H / Oksuzian, Y / Omarov, Z / Osofsky, R / Park, S / Pauletta, G / Piacentino, G M / Pilato, R N / Pitts, K T / Plaster, B / Počanić, D / Pohlman, N / Polly, C C / Price, J / Quinn, B / Qureshi, M U H / Ramachandran, S / Ramberg, E / Reimann, R / Roberts, B L / Rubin, D L / Santi, L / Schlesier, C / Schreckenberger, A / Semertzidis, Y K / Shemyakin, D / Sorbara, M / Stöckinger, D / Stapleton, J / Still, D / Stoughton, C / Stratakis, D / Swanson, H E / Sweetmore, G / Sweigart, D A / Syphers, M J / Tarazona, D A / Teubner, T / Tewsley-Booth, A E / Tishchenko, V / Tran, N H / Turner, W / Valetov, E / Vasilkova, D / Venanzoni, G / Volnykh, V P / Walton, T / Weisskopf, A / Welty-Rieger, L / Winter, P / Wu, Y / Yu, B / Yucel, M / Zeng, Y / Zhang, C

Physical review letters

2023 Volume 131, Issue 16, Page(s) 161802

Abstract: We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from the Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. We have analyzed more than 4 times the number of positrons from muon decay than in our ... ...

Abstract	We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from the Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. We have analyzed more than 4 times the number of positrons from muon decay than in our previous result from 2018 data. The systematic error is reduced by more than a factor of 2 due to better running conditions, a more stable beam, and improved knowledge of the magnetic field weighted by the muon distribution, ω[over ˜]_{p}^{'}, and of the anomalous precession frequency corrected for beam dynamics effects, ω_{a}. From the ratio ω_{a}/ω[over ˜]_{p}^{'}, together with precisely determined external parameters, we determine a_{μ}=116 592 057(25)×10^{-11} (0.21 ppm). Combining this result with our previous result from the 2018 data, we obtain a_{μ}(FNAL)=116 592 055(24)×10^{-11} (0.20 ppm). The new experimental world average is a_{μ}(exp)=116 592 059(22)×10^{-11} (0.19 ppm), which represents a factor of 2 improvement in precision.
Language	English
Publishing date	2023-11-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.131.161802
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Article ; Online: Measurement of muon capture on the proton to 1% precision and determination of the pseudoscalar coupling gP.

Andreev, V A / Banks, T I / Carey, R M / Case, T A / Clayton, S M / Crowe, K M / Deutsch, J / Egger, J / Freedman, S J / Ganzha, V A / Gorringe, T / Gray, F E / Hertzog, D W / Hildebrandt, M / Kammel, P / Kiburg, B / Knaack, S / Kravtsov, P A / Krivshich, A G /

Lauss, B / Lynch, K R / Maev, E M / Maev, O E / Mulhauser, F / Petitjean, C / Petrov, G E / Prieels, R / Schapkin, G N / Semenchuk, G G / Soroka, M A / Tishchenko, V / Vasilyev, A A / Vorobyov, A A / Vznuzdaev, M E / Winter, P

Physical review letters

2013 Volume 110, Issue 1, Page(s) 12504

Abstract: The MuCap experiment at the Paul Scherrer Institute has measured the rate Λ(S) of muon capture from the singlet state of the muonic hydrogen atom to a precision of 1%. A muon beam was stopped in a time projection chamber filled with 10-bar, ultrapure ... ...

Abstract	The MuCap experiment at the Paul Scherrer Institute has measured the rate Λ(S) of muon capture from the singlet state of the muonic hydrogen atom to a precision of 1%. A muon beam was stopped in a time projection chamber filled with 10-bar, ultrapure hydrogen gas. Cylindrical wire chambers and a segmented scintillator barrel detected electrons from muon decay. Λ(S) is determined from the difference between the μ(-) disappearance rate in hydrogen and the free muon decay rate. The result is based on the analysis of 1.2 × 10(10) μ(-) decays, from which we extract the capture rate Λ(S) = (714.9 ± 5.4(stat) ± 5.1(syst)) s(-1) and derive the proton's pseudoscalar coupling g(P)(q(0)(2) = -0.88 m(μ)(2)) = 8.06 ± 0.55.
Language	English
Publishing date	2013-01-04
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.110.012504
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Article ; Online: Measurement of the positive muon lifetime and determination of the Fermi constant to part-per-million precision.

Webber, D M / Tishchenko, V / Peng, Q / Battu, S / Carey, R M / Chitwood, D B / Crnkovic, J / Debevec, P T / Dhamija, S / Earle, W / Gafarov, A / Giovanetti, K / Gorringe, T P / Gray, F E / Hartwig, Z / Hertzog, D W / Johnson, B / Kammel, P / Kiburg, B /

Kizilgul, S / Kunkle, J / Lauss, B / Logashenko, I / Lynch, K R / McNabb, R / Miller, J P / Mulhauser, F / Onderwater, C J G / Phillips, J / Rath, S / Roberts, B L / Winter, P / Wolfe, B

Physical review letters

2011 Volume 106, Issue 4, Page(s) 41803

Abstract: We report a measurement of the positive muon lifetime to a precision of 1.0 ppm; it is the most precise particle lifetime ever measured. The experiment used a time-structured, low-energy muon beam and a segmented plastic scintillator array to record more ...

Abstract	We report a measurement of the positive muon lifetime to a precision of 1.0 ppm; it is the most precise particle lifetime ever measured. The experiment used a time-structured, low-energy muon beam and a segmented plastic scintillator array to record more than 2×10(12) decays. Two different stopping target configurations were employed in independent data-taking periods. The combined results give τ(μ(+)) (MuLan)=2 196 980.3(2.2) ps, more than 15 times as precise as any previous experiment. The muon lifetime gives the most precise value for the Fermi constant: G(F) (MuLan)=1.166 378 8(7)×10(-5) GeV(-2) (0.6 ppm). It is also used to extract the μ(-)p singlet capture rate, which determines the proton's weak induced pseudoscalar coupling g(P).
Language	English
Publishing date	2011-01-28
Publishing country	United States
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.106.041803
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Article: Muon-catalyzed dd fusion between 25 and 150 K: Theoretical analysis.

Scrinzi / Kammel / Zmeskal / Breunlich / Marton / Faifman / Ponomarev / Strizh

Physical review. A, Atomic, molecular, and optical physics

1993 Volume 47, Issue 6, Page(s) 4691–4704

Language	English
Publishing date	1993-06
Publishing country	United States
Document type	Journal Article
ZDB-ID	209769-2
ISSN	1050-2947 ; 2469-9926 ; 0556-2791
ISSN	1050-2947 ; 2469-9926 ; 0556-2791
DOI	10.1103/physreva.47.4691
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Article ; Online: Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm.

Abi, B / Albahri, T / Al-Kilani, S / Allspach, D / Alonzi, L P / Anastasi, A / Anisenkov, A / Azfar, F / Badgley, K / Baeßler, S / Bailey, I / Baranov, V A / Barlas-Yucel, E / Barrett, T / Barzi, E / Basti, A / Bedeschi, F / Behnke, A / Berz, M /

Bhattacharya, M / Binney, H P / Bjorkquist, R / Bloom, P / Bono, J / Bottalico, E / Bowcock, T / Boyden, D / Cantatore, G / Carey, R M / Carroll, J / Casey, B C K / Cauz, D / Ceravolo, S / Chakraborty, R / Chang, S P / Chapelain, A / Chappa, S / Charity, S / Chislett, R / Choi, J / Chu, Z / Chupp, T E / Convery, M E / Conway, A / Corradi, G / Corrodi, S / Cotrozzi, L / Crnkovic, J D / Dabagov, S / De Lurgio, P M / Debevec, P T / Di Falco, S / Di Meo, P / Di Sciascio, G / Di Stefano, R / Drendel, B / Driutti, A / Duginov, V N / Eads, M / Eggert, N / Epps, A / Esquivel, J / Farooq, M / Fatemi, R / Ferrari, C / Fertl, M / Fiedler, A / Fienberg, A T / Fioretti, A / Flay, D / Foster, S B / Friedsam, H / Frlež, E / Froemming, N S / Fry, J / Fu, C / Gabbanini, C / Galati, M D / Ganguly, S / Garcia, A / Gastler, D E / George, J / Gibbons, L K / Gioiosa, A / Giovanetti, K L / Girotti, P / Gohn, W / Gorringe, T / Grange, J / Grant, S / Gray, F / Haciomeroglu, S / Hahn, D / Halewood-Leagas, T / Hampai, D / Han, F / Hazen, E / Hempstead, J / Henry, S / Herrod, A T / Hertzog, D W / Hesketh, G / Hibbert, A / Hodge, Z / Holzbauer, J L / Hong, K W / Hong, R / Iacovacci, M / Incagli, M / Johnstone, C / Johnstone, J A / Kammel, P / Kargiantoulakis, M / Karuza, M / Kaspar, J / Kawall, D / Kelton, L / Keshavarzi, A / Kessler, D / Khaw, K S / Khechadoorian, Z / Khomutov, N V / Kiburg, B / Kiburg, M / Kim, O / Kim, S C / Kim, Y I / King, B / Kinnaird, N / Korostelev, M / Kourbanis, I / Kraegeloh, E / Krylov, V A / Kuchibhotla, A / Kuchinskiy, N A / Labe, K R / LaBounty, J / Lancaster, M / Lee, M J / Lee, S / Leo, S / Li, B / Li, D / Li, L / Logashenko, I / Lorente Campos, A / Lucà, A / Lukicov, G / Luo, G / Lusiani, A / Lyon, A L / MacCoy, B / Madrak, R / Makino, K / Marignetti, F / Mastroianni, S / Maxfield, S / McEvoy, M / Merritt, W / Mikhailichenko, A A / Miller, J P / Miozzi, S / Morgan, J P / Morse, W M / Mott, J / Motuk, E / Nath, A / Newton, D / Nguyen, H / Oberling, M / Osofsky, R / Ostiguy, J-F / Park, S / Pauletta, G / Piacentino, G M / Pilato, R N / Pitts, K T / Plaster, B / Počanić, D / Pohlman, N / Polly, C C / Popovic, M / Price, J / Quinn, B / Raha, N / Ramachandran, S / Ramberg, E / Rider, N T / Ritchie, J L / Roberts, B L / Rubin, D L / Santi, L / Sathyan, D / Schellman, H / Schlesier, C / Schreckenberger, A / Semertzidis, Y K / Shatunov, Y M / Shemyakin, D / Shenk, M / Sim, D / Smith, M W / Smith, A / Soha, A K / Sorbara, M / Stöckinger, D / Stapleton, J / Still, D / Stoughton, C / Stratakis, D / Strohman, C / Stuttard, T / Swanson, H E / Sweetmore, G / Sweigart, D A / Syphers, M J / Tarazona, D A / Teubner, T / Tewsley-Booth, A E / Thomson, K / Tishchenko, V / Tran, N H / Turner, W / Valetov, E / Vasilkova, D / Venanzoni, G / Volnykh, V P / Walton, T / Warren, M / Weisskopf, A / Welty-Rieger, L / Whitley, M / Winter, P / Wolski, A / Wormald, M / Wu, W / Yoshikawa, C

Physical review letters

2021 Volume 126, Issue 14, Page(s) 141801

Abstract: We present the first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g-2 Experiment for the positive muon magnetic anomaly a_{μ}≡(g_{μ}-2)/2. The anomaly is determined from the precision measurements of two angular frequencies. ... ...

Abstract	We present the first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g-2 Experiment for the positive muon magnetic anomaly a_{μ}≡(g_{μ}-2)/2. The anomaly is determined from the precision measurements of two angular frequencies. Intensity variation of high-energy positrons from muon decays directly encodes the difference frequency ω_{a} between the spin-precession and cyclotron frequencies for polarized muons in a magnetic storage ring. The storage ring magnetic field is measured using nuclear magnetic resonance probes calibrated in terms of the equivalent proton spin precession frequency ω[over ˜]_{p}^{'} in a spherical water sample at 34.7 °C. The ratio ω_{a}/ω[over ˜]_{p}^{'}, together with known fundamental constants, determines a_{μ}(FNAL)=116 592 040(54)×10^{-11} (0.46 ppm). The result is 3.3 standard deviations greater than the standard model prediction and is in excellent agreement with the previous Brookhaven National Laboratory (BNL) E821 measurement. After combination with previous measurements of both μ^{+} and μ^{-}, the new experimental average of a_{μ}(Exp)=116 592 061(41)×10^{-11} (0.35 ppm) increases the tension between experiment and theory to 4.2 standard deviations.
Language	English
Publishing date	2021-04-23
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.126.141801
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Online: Muon Capture on the Deuteron -- The MuSun Experiment

Andreev, V. A. / Carey, R. M. / Ganzha, V. A. / Gardestig, A. / Gorringe, T. / Gray, F. E. / Hertzog, D. W. / Hildebrandt, M. / Kammel, P. / Kiburg, B. / Knaack, S. / Kravtsov, P. A. / Krivshich, A. G. / Kubodera, K. / Lauss, B. / Lynch, K. R. / Maev, E. M. / Maev, O. E. / Mulhauser, F. /

Myhrer, F. / Petitjean, C. / Petrov, G. E. / Prieels, R. / Schapkin, G. N. / Semenchuk, G. G. / Soroka, M. A. / Tishchenko, V. / Vasilyev, A. A. / Vorobyov, A. A. / Vznuzdaev, M. E. / Winter, P.

2010

Abstract: We propose to measure the rate \Rd\ for muon capture on the deuteron to better than 1.5% precision. This process is the simplest weak interaction process on a nucleus that can both be calculated and measured to a high degree of precision. The measurement ...

Abstract	We propose to measure the rate \Rd\ for muon capture on the deuteron to better than 1.5% precision. This process is the simplest weak interaction process on a nucleus that can both be calculated and measured to a high degree of precision. The measurement will provide a benchmark result, far more precise than any current experimental information on weak interaction processes in the two-nucleon system. Moreover, it can impact our understanding of fundamental reactions of astrophysical interest, like solar pp fusion and the $\nu+d$ reactions observed by the Sudbury Neutrino Observatory. Recent effective field theory calculations have demonstrated, that all these reactions are related by one axial two-body current term, parameterized by a single low-energy constant. Muon capture on the deuteron is a clean and accurate way to determine this constant. Once it is known, the above mentioned astrophysical, as well as other important two-nucleon reactions, will be determined in a model independent way at the same precision as the measured muon capture reaction. Comment: Proposal for PSI Experiment R-08-01, submitted February 8, 2008
Keywords	Nuclear Experiment ; Nuclear Theory
Subject code	612
Publishing date	2010-04-10
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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